Business & e-commerce calculators

Margin, break-even, tax, ROI, plus Amazon and Etsy seller fee calculators — everything runs locally in your browser.

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Profit Margin Calculator
Calculate gross profit, net profit, and margin percentage from revenue and costs. Updates instantly.
Calculator☆
Break-even Calculator
Find your break-even point in units and revenue. Enter fixed costs, price per unit, and variable cost per unit.
Calculator☆
VAT / Sales Tax Calculator
Add or remove VAT and sales tax from any amount. Preset rates for US, UK, EU, and custom percentage.
Tax☆
Salary Converter — Annual, Monthly, Hourly
Convert salary between annual, monthly, bi-weekly, weekly, daily, and hourly rates. Adjust for hours and weeks worked.
Pay☆
ROI Calculator — Return on Investment
Calculate return on investment percentage from initial cost and final value. See profit and ROI instantly.
Calculator☆
Amazon Seller Fee Calculator
Estimate Amazon referral fees, FBA fees, and net profit per sale. Enter price, category, and fulfillment method.
Fees☆
Etsy Fee Calculator
Calculate Etsy listing, transaction, payment processing, and shipping fees. See net profit per sale instantly.
Fees☆
Commission Calculator — Sales Commission
Calculate sales commission from deal value and commission rate. Supports flat rate and tiered percentages.
Calculator☆
Contractor Rate Calculator — Hourly to Salary
Convert desired annual salary to an hourly contractor rate. Factor in billable hours, expenses, and tax buffer.
Pay☆
Pricing Calculator — Markup & Margin
Calculate selling price from cost and markup or margin. See profit per unit instantly.
Calculator☆
Invoice Due Date Calculator
Calculate invoice due dates from issue date and payment terms. Net 30, Net 60, or custom days.
Invoicing☆
Shopify Discount Calculator — Stacked Discounts
Calculate final price after stacked Shopify discounts. Enter original price and multiple discount percentages.
Pricing☆
GTIN Validator — EAN-13 & UPC Check Digit
Validate GTIN, EAN-13, and UPC barcodes. Verify check digits and format. Free, runs in your browser.
Pricing☆
Generate Invoice Numbers Online
Generate Invoice Numbers Online. Free, instant, runs in your browser.
Invoicing☆
Generate Purchase Order Online
Generate Purchase Order Online. Free, instant, runs in your browser.
Invoicing☆
Generate Business Name Ideas
Generate Business Name Ideas. Free, instant, runs in your browser.
Generate☆
Currency Margin Calculator
Currency Margin Calculator. Free, instant, runs in your browser.
Calculator☆
Shipping Cost Calculator
Shipping Cost Calculator. Free, instant, runs in your browser.
Pricing☆
SKU Generator Online
SKU Generator Online. Free, instant, runs in your browser.
Pricing☆

About these business calculators

Running a business means constantly answering margin, pricing, tax, and payroll questions. These calculators give instant answers without a spreadsheet.

What you can calculate

The profit margin calculator shows gross and net margins. The break-even calculator finds how many units you need to sell. The VAT calculator adds or removes tax. The salary converter translates between annual, monthly, and hourly pay.

E-commerce fee calculators

Selling on a marketplace means platform fees eat into every sale. These marketplace fee calculators and pricing tools estimate fees and net profit before you list, so you can price products to stay profitable.

The Amazon fee calculator estimates referral and FBA fees by category. The Etsy fee calculator breaks down listing, transaction, and payment processing costs. The Shopify discount calculator works out stacked discount prices, the shipping calculator estimates delivery cost, and the SKU generator and GTIN validator keep product catalogs clean. All of these e-commerce tools used to live under the separate /e-commerce hub and now sit here alongside the rest of the business calculators.

Privacy

All calculations run in your browser. Revenue, costs, salary, and pricing figures never leave your device.