Free Business Tools & Calculators
Every free invoice24 tool in one place, built for United States businesses — invoicing, payroll, tax calculators, converters, PDF tools, and generators. All free, no sign-up required.
Invoicing & Documents
Invoice Generator →Create and send professional invoices, free, no sign-up required.Receipt Generator →Generate itemized, print-ready receipts for any sale or payment.Estimate Generator →Create a professional quote or estimate to send to a prospective client.Quote Generator →Create a firm, fixed-price quote or quotation a client can accept, then download as PDF.Credit Memo Generator →Correct or cancel an already-issued invoice with a referenced credit note, then download as PDF.United States Purchase Order Generator →Create and send purchase orders to suppliers, tracked and print-ready.Expense Report Generator →Log business expenses and generate an expense report for reimbursement or accounting.Invoice Templates →Free, downloadable invoice templates in Word, Excel, and PDF.Estimate Template →Download a free estimate template for the United States with editable line items, validity dates, sales tax notes, and Word or Excel formats.Quote Template →Download a free quote template for the United States with acceptance terms, expiry dates, sales tax notes, and Word or Excel formats.Proforma Invoice Template →Download a free proforma invoice template for the United States with line items, customs/payment notes, sales tax caution, and Word or Excel formats.Credit Memo Template →Download a free credit memo template for the United States with original invoice reference, reason, sales tax adjustment, and Word or Excel formats.Delivery Note Template →Download a free delivery note template for the United States with delivery address, item quantities, carrier details, signature fields, and Word or Excel formats.Purchase Order Template →Download a free purchase order template for the United States with PO number, supplier details, delivery address, approval fields, and Word or Excel formats.Itemized Invoice Template →Download a free itemized invoice template for the United States with detailed line items, quantities, unit prices, sales tax, totals, and Word or Excel formats.Receipt Template →Create professional receipts for your US business. Add line items, apply sales tax, and download as a clean PDF — free, no sign-up required.Document Templates →Fill-in legal and business document templates — free Word and PDF downloads, no sign-up.Invoice Templates by Industry →Download industry-specific invoice templates in Google Sheets, Google Docs, Excel, and Word.Invoice Generators by Industry →Invoice generators tailored field-by-field to your specific trade or profession.E-Signature →Sign documents electronically or collect signatures from clients online.
Payroll & Tax Calculators
Sales Tax Calculator →Calculate the correct sales/VAT/GST tax to charge on an invoice.Paycheck Calculator →Calculate gross-to-net salary, tax, and deductions for an employee.Payslip Generator →Generate compliant, itemized payslips for employees each pay period.Hourly Paycheck Calculator →Calculate take-home pay from an hourly rate, overtime, and the full employer cost.Income Tax Calculator →Estimate personal income tax owed based on income and allowances.Corporation Tax Calculator →Calculate corporation/company tax owed on business profits.Two Jobs Tax Calculator →Estimate the federal tax withholding mismatch that happens when you work two jobs at once in the US, caused by each employer's W-4 assuming it is your only job.Pro Rata Salary Calculator →Calculate prorated salary from full-time pay, weekly hours and part-year work.Bradford Factor Calculator →Calculate an absence-pattern score for HR policy review.PTO Accrual Calculator →Estimate US vacation or PTO allowance from an employer policy, with federal FLSA caveats.FMLA Medical Leave Calculator →Estimate federal FMLA medical leave eligibility and remaining protected weeks.FMLA Parental Leave Calculator →Estimate federal FMLA parental and bonding leave eligibility and remaining protected weeks.Company Car Personal Use Tax Calculator →Calculate the taxable value of personal use of an employer-provided vehicle using the IRS cents-per-mile rule.W-4 Withholding Calculator →Estimate federal tax withholding to fill out Form W-4 correctly.
Project & Time Tracking
Project Cost Calculator →Estimate total project cost from labor, materials, and overheads.Revenue Forecaster →Forecast future revenue based on historical growth and trends.Work Hours Calculator →Calculate total hours worked between a start and end time.Time Card Calculator →Total up weekly time card hours for payroll, including overtime.Timesheet Template →Log hours, breaks and overtime with automatic totals — no sign-up.
Business Calculators
Margin Calculator →Work out profit margin, markup, and selling price from cost and margin percentage.Percentage Calculator →Calculate percentages, percentage change, and percentage of a total instantly.Loan Calculator →Estimate monthly repayments, total interest, and amortization for any loan.Investment Calculator →Project mutual fund and investment growth with compounding returns over time.Mortgage Calculator →Calculate mortgage repayments, interest, and amortization schedules.Amortization Calculator →See your full amortisation schedule, compare repayment methods, and model extra payments.Date Calculator →Add, subtract, or find the difference between dates in days, weeks, or months.Board Foot Calculator →Calculate timber volume, cut lists, log scaling, and firewood conversions.
Converters & Lookup Tools
Currency Converter →Convert between world currencies using live exchange rates.Unit Converter →Convert length, weight, volume, area, temperature, and more between units.Time Zone Converter →Compare times across time zones and find overlapping working hours.Routing Number Lookup →Look up bank routing, sort, or SWIFT/IBAN codes for domestic and international transfers.
PDF Tools
Edit PDF →Add text, images, and annotations to any PDF directly in your browser.Watermark PDF →Add text or logo watermarks to PDF files in your browser, with no upload.Merge PDF →Combine multiple PDF files into a single document in seconds.Split PDF →Extract specific pages or split a PDF into multiple separate files.Compress PDF →Reduce PDF file size for easier sharing and emailing without losing quality.PDF to Word →Convert a PDF into an editable Word (.docx) document.PDF to Excel →Extract tables and data from a PDF into an editable Excel spreadsheet.Word to PDF →Convert a Word document into a shareable, print-ready PDF.JPG to PDF →Combine one or more JPG images into a single PDF file.PDF to JPG →Convert each page of a PDF into a high-quality JPG image.
Generators & Design Tools
QR Code Generator →Create a free QR code for a URL, Wi-Fi network, contact card, or plain text.Barcode Generator →Create free EAN, UPC, Code 128, GS1-128, QR, DataMatrix and print-ready barcode labels.Logo Maker →Design a professional logo for your business in minutes, no design skills needed.Logo templates for your business →Logo templates for 450+ industries and trades. Customize on the page and download SVG and transparent PNG free — no account, no watermark.Letterhead templates built for US Letter →Design a letterhead in your browser – free, no account needed. US Letter size, address positioned for a #10 window envelope; export as PDF or Word in seconds.Menu Maker →Make a restaurant menu free — photograph your current one or start fresh.Menu Templates →Editable restaurant menu templates — fill in and download a print-ready PDF.Business Card Maker →Create and download print-ready business cards with your branding.Business Name Generator →Generate unique, available business name ideas for your new venture.SKU Generator →Generate consistent, structured SKU codes for your product inventory.Random Number Generator →Generate random numbers within a custom range for draws, samples, or testing.Password Generator →Create strong, random passwords with customizable length and character sets.Word Counter →Count words, characters, sentences, and estimated reading time instantly.Online whiteboard →Open a free online whiteboard for drawing, lessons, brainstorming and quick exports. No install required.Remove Image Background →Automatically remove the background from any photo or product image.Image Resizer →Resize, compress and convert images in your browser — set exact pixels or a target size in KB, with no upload.Color Picker →Pick any color from an image and get instant HEX, RGB, HSL, HSV and CMYK codes.Email Signature Generator →Create a professional HTML email signature and copy it straight into Gmail or Outlook.QR Code Scanner →Scan a QR code from your camera, screenshot, or image.
Finance & Reporting
Conversions & geometry
Square Footage Calculator →Free square footage calculator for rooms, floors, and lots. Enter length and width to instantly get square footage for flooring, paint, or real estate — with a multi-room total.Square Meter Calculator →Free square meter calculator for square, rectangular, circular, and polygon rooms. Get an instant m² figure for flooring, tiling, or paint — enter your shape and dimensions.Square Yards Calculator →Square yards calculator for carpet, turf, and flooring. Enter length and width in feet or metres to get square yards instantly, plus a waste-adjusted quantity and cost.Wall Square Footage Calculator →Calculate wall square footage for paint, wallpaper, or drywall — enter room dimensions and door/window openings for an accurate paintable area and material cost estimate.Cubic Yard Calculator →Cubic yard calculator for gravel, mulch, topsoil, and concrete. Choose your shape, enter dimensions, and get cubic yards plus an estimated delivered material cost.Square Feet to Cubic Yards Calculator →Convert square feet to cubic yards for concrete slabs, mulch, or gravel. Enter area (or length x width) and depth to get the cubic yards you need to order, plus cost.Gallons Per Square Foot Calculator →Gallons per square foot calculator for pools, tanks, and raised beds. Enter area (or length x width) and height/depth to get total gallons and the gal/sq ft coverage rate.Elevation Grade Calculator →Free elevation grade calculator: enter rise and run to get slope grade percentage, ratio, and angle of elevation — for driveways, drainage, ramps, and site grading.Ramp Slope Calculator →Ramp slope calculator for wheelchair and ADA-compliant accessibility ramps. Enter rise and choose a slope ratio (e.g. ADA 1:12) to get the required run, ramp length, and grade percent.Miter Angle Calculator →Miter angle calculator for trim, crown molding, and framing corners. Enter the joint angle and board widths to get the exact miter saw cut angle for each board.Angle Cut Calculator →Angle cut calculator for knee braces and diagonal supports. Enter plank thickness and the two leg distances to get the cutting angle and required plank length.Angle of Depression Calculator →Angle of depression calculator: enter vertical drop and horizontal distance to find the angle below horizontal for a line of sight — useful for surveying and site planning.Taper Calculator →Taper calculator for machining and woodworking: enter major diameter, minor diameter, and taper length to get the taper angle and taper ratio (e.g. 1:x).Rolling Offset Calculator →Rolling offset calculator for pipefitters: enter roll, set, and fitting angle to get the true offset, travel (cut length), and run for angled pipe around obstructions.
Concrete & masonry
Concrete Slab Calculator →Free concrete slab calculator: enter length, width and thickness in feet/inches to get cubic yards, bag count or ready-mix order size and a real cost estimate.Concrete Column Calculator →Concrete column calculator: work out concrete volume for round or square columns from diameter/side and height, in cubic yards, with bag count and cost.Concrete Cylinder Calculator →Concrete cylinder calculator for pours and ASTM C39/C31 test cylinders: enter diameter and height (4x8 in / 6x12 in) for volume, bags and material cost.Concrete Block Calculator →US concrete block (CMU) calculator: work out how many 16x8 in blocks and mortar bags you need for a wall, with joint-aware maths and a real cost estimate.Concrete Block Fill Calculator →US CMU core-fill calculator: work out how much grout fills the hollow cores of a standard 8x8x16 in concrete block wall, with bags and material cost. The standard method for reinforced CMU cavity walls in US construction.Cement Calculator →US cement calculator: enter your wet (placed) volume and mix ratio to get cement, sand and aggregate quantities, 94 lb bag count and material cost.Sonotube Calculator →US sonotube calculator: pick a standard tube diameter (6 in - 24 in) and enter height to get concrete volume, bag count and material cost for piers and footings.Rebar Calculator →US rebar calculator: enter slab size and bar spacing (#3-#8, ASTM A615 Grade 60) to get bar count, total weight in lbs and material cost.Brick Calculator →US brick calculator: work out how many modular bricks (7⅝ x 2¼ in actual, 8x2⅔x4 in nominal) you need for a wall, single or double wythe, plus mortar and cost.Retaining Wall Calculator →US retaining wall calculator: work out how many segmental wall blocks you need plus gravel backfill volume and weight, with a real material cost estimate.Wall Volume & Cost Calculator →US wall volume and cost calculator: enter wall length, height and thickness for a poured concrete wall, or block/brick size for a masonry wall, to get cost.
Aggregates & earthworks
Gravel Calculator →Calculate how much gravel you need for a driveway, path or landscaping job. Get volume, weight in tons and an instant cost estimate — pea gravel, crusher run and more.Sand Calculator →Calculate how much sand you need for concrete, mortar or landscaping. Get volume, weight in tons and an instant cost estimate for dry, wet or fill sand.Crushed Stone Calculator →Work out how much crushed stone (crusher run, #57, #4) you need for a driveway or sub-base. Instant volume, weight in tons and cost estimate.River Rock Calculator →Calculate how much river rock or decorative stone you need to cover a landscaping area. Get volume, weight in tons and cost by rock type.Limestone Calculator →Calculate how much crushed limestone you need for a driveway or sub-base. Get volume, weight in tons and an instant cost estimate.Asphalt Calculator →Calculate how much asphalt you need for a driveway, accounting for compaction. Get tonnage, loose-mix volume and an instant cost estimate.Paver Sand Calculator →Calculate how much bedding sand and polymeric joint sand you need for a paver patio or walkway. Get volume, weight and cost.French Drain Calculator →Plan a French drain from trench dimensions: gravel backfill volume, perforated pipe run length and slope, filter fabric area, plus total cost.
Weights
Steel Weight Calculator →Calculate the weight of round bar, rebar, tube or rectangular steel stock from its dimensions and grade. Instant weight in lb/kg and cost estimate.Steel Plate Weight Calculator →Calculate the weight of a rectangular, circular or ring steel plate from its dimensions and grade. Instant weight in lb/kg and cost estimate.Aluminum Weight Calculator →Calculate the weight of aluminum sheet, plate, round bar or tube by alloy (6061, 5083, 7075 and more). Instant weight in lb/kg and cost estimate.Metal Weight Calculator →Calculate the weight of bar, tube, plate or box stock in steel, aluminum, brass, copper, titanium and more. Instant weight in lb/kg and cost estimate.Glass Weight Calculator →Calculate the weight of a glass sheet, panel or rod by shape, thickness and glass type. Instant weight in lb/kg and cost estimate.Pipe Weight Calculator →Calculate pipe or tube weight from outer diameter, wall thickness (or bore) and length. Instant weight in lb/kg and cost estimate.Lumber Weight Calculator →Calculate the weight of dimensional lumber (2x4, 2x6, 2x8 and more) from length, width, thickness and species, adjusted for moisture state.Log Weight Calculator →Calculate the weight of a tapered round log from its small-end/large-end diameters, length and species, adjusted for moisture state.Concrete Weight Calculator →Calculate the weight of a concrete pour from its volume or dimensions, by concrete type. Instant weight in lb/tons and cost estimate.Size to Weight Calculator (Rectangular Cuboid) →Calculate the weight of any rectangular box or cuboid from its length, width and height, using a built-in materials density table or your own custom density.
Carpentry & framing
Framing Calculator →Calculate the number of 2x4 studs, plates, and corner studs for a framed wall. Standard 16in on-center spacing with 19.2in/24in options.Rafter Length Calculator →Calculate rafter length from rise, run, and overhang, plus rafter count for your roof.Roof Truss Calculator →Calculate rafter/top-chord length and truss count for your roof, with material and installation cost.Stair Calculator →Calculate step count, riser height, tread depth, and stringer length for your staircase, checked against IRC guidance.Spiral Staircase Calculator →Calculate step count, tread angle, handrail length, and headroom clearance for a spiral staircase.Baluster Spacing Calculator →Calculate baluster (spindle) count and spacing for a deck or stair railing, checked against a 4in maximum gap convention.Wood Beam Span Calculator →Check a wood beam span against deflection, bending, and shear limits per US NDS 2018 (National Design Specification, AWC).Floor Joist Calculator →Calculate floor joist count and cost, or find the maximum allowable span, per US NDS 2018 / 2012 IBC.Plywood Calculator →Calculate how many plywood sheets you need, using the standard 4x8ft sheet size.Roof Pitch Calculator →Convert roof rise and run into pitch as a percent grade, degrees, or x-in-12 ratio, plus rafter length.
Structural
Beam Deflection Calculator →Calculate maximum beam deflection for simply-supported or cantilever beams, with a deflection-limit pass/fail check.Beam Load Calculator →Calculate support reactions, shear force, and bending moment for a simply-supported beam carrying up to 10 point loads.Bending Stress Calculator →Calculate bending stress or applied moment using the flexure formula for common cross-sections, with a utilization-ratio check.Snow Load Calculator →Calculate ground-to-roof snow load per ASCE 7, with exposure, thermal, and importance factors, and a roof-capacity pass/fail check.
HVAC, energy & flow
CFM Calculator →Calculate the required airflow in CFM for any room from its size and target air changes per hour (ACH).Air Changes Per Hour Calculator →Work out the ACH a room is actually getting from its size and measured airflow, and check it against the recommended target.Heat Loss Calculator →Calculate a room’s fabric heat loss for HVAC/heater BTU load sizing from wall, window, door, floor and ceiling U-values.Air Conditioner Room Size (BTU) Calculator →Find the right air conditioner size in BTU/hr for your room from its floor area, sunlight, ceiling height and occupancy.Insulation (R-Value) Calculator →Calculate the total R-value of a multi-layer wall, roof or floor insulation build-up from material type and thickness.Gallons Per Minute (GPM) Calculator →Calculate flow rate in gallons per minute from volume and time, or solve for volume or time instead.Pipe Volume Calculator →Calculate the internal fluid volume and liquid mass of a straight pipe from its inner diameter, length and liquid density.Tank Volume Calculator →Calculate the total and partial-fill capacity of a vertical cylinder, horizontal cylinder, rectangular or capsule-shaped tank, in gallons.
Surfaces & finishes
Flooring Calculator →Calculate how much flooring you need for a room in square feet, with material-specific waste allowance and total cost.Tile Calculator →Calculate how many tiles and boxes you need for a floor or wall, including grout gap, layout pattern and waste allowance.Grout Calculator →Calculate how many bags of grout you need for a tiled area from tile size, joint width and depth, and grout type.Thinset Calculator →Calculate how many bags of thinset mortar you need for a tile job, with thickness and trowel-notch size looked up by tile size.Drywall Calculator →Calculate how many drywall sheets you need for a room from wall/ceiling area, door and window openings, panel size and waste allowance.Wallpaper Calculator →Calculate how many rolls of wallpaper you need for a room, using the standard US double roll size and pattern repeat.Paint Calculator →Calculate how many gallons of paint you need for a room from wall area, number of coats and coverage rate.Epoxy Calculator →Calculate how much epoxy resin and hardener you need for a rectangular or circular surface, at any mix ratio and coating thickness.Sealant Calculator →Calculate how many tubes or cartridges of sealant (caulk) you need for a joint or gap from its length, width and depth.Roofing Calculator →Calculate your roof’s sloped surface area from its footprint and pitch, then estimate material and cost for asphalt shingle, metal, tile or membrane roofing.Roof Shingle Calculator →Calculate how many bundles and squares of asphalt shingles you need from your roof’s footprint, pitch and material coverage.
Outdoor & fencing
Fence Calculator →Work out how many fence posts, rails, pickets and bags of concrete you need for your fence, plus total material cost in USD.Fence Picket Calculator →Calculate exactly how many fence pickets you need from picket width and gap spacing, plus material cost in USD.Board on Board Fence Calculator →Calculate posts, rails and overlapping boards for a board-on-board privacy fence, plus material cost in USD.Decking Calculator →Calculate how many decking boards and fasteners you need for your deck, plus material cost in USD.Paver Calculator →Calculate how many pavers you need for a patio or driveway from area and paver size, including waste allowance and installed cost in USD.Pool Volume Calculator →Calculate your swimming pool volume in gallons or cubic feet and an estimated water-fill cost in USD.Round Pen Calculator →Work out how many fence panels you need for a round pen from its diameter and panel length, plus cost in USD.
Mechanical & electrical
Thread Calculator →Calculate metric or UTS/UNC/UNF screw thread geometry — pitch diameter, minor diameter and tolerance envelopes — from major diameter and pitch.Thread Pitch Calculator →Work out threads-per-inch (TPI) or thread pitch from a measured length and count, and match it to the nearest standard UNC/UNF size.Bolt Torque Calculator →Calculate bolt tightening torque from clamping force using K-factor, diameter and lubrication factor, with an SAE J429/ISO 898-1 torque table.Welding Calculator →Calculate fillet or butt weld load capacity from leg size, length and base-metal strength, checked against AWS D1.1, with a typical callout cost in USD.Box Fill Calculator →Check whether a junction box is within its NEC 314.16(B) fill capacity from conductor count, gauge, devices, clamps and grounds.
Contractor status & IR35-style calculators
1099 vs W-2 Cost Calculator →See the real 2026 cost gap between hiring a 1099 contractor and a W-2 employee — employer FICA, FUTA and benefits vs. contractor take-home, side by side.W-2 Take-Home Pay Calculator →Calculate your 2026 W-2 take-home pay after federal income tax, Social Security and Medicare — built for contractors comparing a W-2 agency offer.1099 / Self-Employed Tax Calculator →Work out your 2026 1099 take-home pay after federal income tax and the 15.3% self-employment tax, with real per-bracket math — not a flat-rate guess.1099 vs W-2 Calculator →Compare 2026 take-home pay as a 1099 contractor vs a W-2 employee at the same gross pay, with federal tax, SE tax and FICA both worked out in full.Worker Misclassification Back-Tax Calculator →Estimate the federal back-tax exposure if a 1099 worker is reclassified as an employee, referencing IRC Section 3509 reduced rates and Section 530 relief.
Contract vs. permanent comparisons
Salary to Contract Rate Calculator →Convert a W-2 salary into an equivalent 1099/C2C hourly or day rate for 2026, accounting for self-employment tax, benefits and billable utilization.Contract Rate to Salary Calculator →Turn a 1099 or C2C hourly rate into an equivalent W-2 salary for 2026 — adjusted for benefits value, PTO and employer-paid FICA.Contract Offer Comparison Calculator →Compare two or more 2026 contract offers side by side — rate, hours, duration, benefits and utilization — to see which pays more after tax.Salary Comparison Calculator →Compare two 2026 salary offers after federal tax, Social Security and Medicare to see the real take-home difference between them.C2C vs W-2 Rate Calculator →Compare corp-to-corp (C2C) and W-2 agency contract rates for 2026, including S-corp payroll costs, insurance and admin overhead.
Contractor payroll & dividend tax
FICA & Payroll Tax Calculator →Calculate 2026 FICA — Social Security and Medicare, employee and employer share — plus the equivalent 15.3% self-employment tax for 1099 workers.Dividend Tax Calculator →Work out 2026 federal tax on qualified dividends at the 0/15/20% brackets, plus the 3.8% Net Investment Income Tax (NIIT) where it applies.
Small business & VAT
S Corp Tax Calculator →Model 2026 S-corp reasonable salary vs. distribution, payroll-tax savings over a sole proprietorship, and the QBI deduction — federal only.Sales Tax Calculator →Add or remove US sales tax from a price using the 2026 national average combined rate, or plug in your own state and local rate for an exact figure.
Contractor financial planning
Self-Employed Mortgage Affordability Calculator →Estimate 2026 mortgage affordability from 1099/Schedule C income using 2-year averaging and common lender add-backs, for bank-statement and full-doc loans.Mortgage Payment & Net Income Impact Calculator →See a 2026 mortgage payment (PITI) against your actual after-tax 1099 or W-2 income, with a lean-month stress test for variable earners.Solo 401(k) / SEP-IRA Contribution Calculator →Work out your maximum 2026 Solo 401(k) or SEP-IRA contribution from self-employment income, including the age-based catch-up tiers.Life Insurance Needs Calculator →Work out how much life insurance you need in 2026 using income replacement, debts and existing cover — with a freelancer mode for lost group benefits.Freelancer Financial Health Check →Check your 2026 freelancer finances in one view — tax set-aside percentage, runway in months, effective hourly rate and a benefits self-funding gap.Employee Financial Health Check →Check your 2026 W-2 finances in one view — paycheck-linked budget, 401(k) match capture and a savings-rate benchmark.
Target income & budget impact
Freelance Rate Calculator →Work backwards from your target 2026 take-home pay, through real SE tax, federal tax and benefits, to the hourly or day rate you need to charge.Required Salary (Gross-Up) Calculator →Find the 2026 gross salary you need to take home a target amount, after federal income tax, Social Security and Medicare.2026 Tax Law Changes Calculator (OBBBA) →See how the One Big Beautiful Bill Act's 2026 changes — new deductions, the SALT cap and QBI — affect a W-2 employee or 1099 self-employed filer.Invoice Late Fee Calculator →Calculate late-payment interest on an overdue US invoice using a standard 1.5%-a-month contractual rate — the US has no single federal statutory rate.
