Calculators
Quick, exact calculators for pricing, tax, pay and finance. Results update as you type, never leave your browser, and every calculation has a link you can share.
16 tools
Profit Margin Calculator
Work out profit, margin and markup from cost and price, or the price you need for a target margin. Free.
Markup Calculator
Find the selling price from cost and markup, or the markup from cost and price, with the matching margin.
VAT & Sales Tax Calculator
Add VAT, GST or sales tax to a price, or take it out of a gross amount. Any rate, instant results. Free.
Discount Calculator
See the sale price and how much you save from a percentage or fixed discount, including stacked discounts.
Percentage Calculator
Percent of a number, what percent one number is of another, and percentage increase or decrease.
Loan & EMI Calculator
Monthly payment, total interest and an amortisation schedule for any loan amount, rate and term. Free.
Break-Even Calculator
How many units you need to sell to cover your costs, or to reach a profit target, and the revenue that takes.
Compound Interest Calculator
See how savings grow with compound interest and monthly contributions, year by year. Free and instant.
Salary to Hourly Calculator
Convert pay between hourly, daily, weekly, monthly and annual, using your own hours and weeks worked.
Freelance Rate Calculator
Work out the hourly and day rate you need to charge for your target income after tax, expenses and time off.
Late Payment Interest Calculator
Calculate interest and fees on an overdue invoice from the amount, rate and days late. Free, instant.
ROI Calculator
Return on investment, net profit and annualised return for any investment, campaign or project. Free and instant.
Tip & Split Bill Calculator
Work out the tip and split the bill between any number of people, with optional rounding up. Free and instant.
Overtime Pay Calculator
Work out overtime pay at time and a half, double time or any rate, with regular and overtime pay shown separately. Free.
Working Days Calculator
Count working days between two dates, or add business days to a date, skipping weekends and holidays. Free.
Currency Converter
Convert between 160+ currencies with daily reference rates from the European Central Bank and Exchange Rate API. Free.
Pricing and profit
Set prices with the profit margin and markup calculators, check how many sales cover your costs with the break-even calculator, measure returns with the ROI calculator, and see what a sale really costs you with the discount calculator.
Tax, pay and money
Add or remove VAT, GST and sales tax, convert a salary to an hourly rate, work out overtime pay, set a freelance rate that covers tax and expenses, compare loans, project savings growth, work out interest on a late invoice, and split a bill with a tip.
Frequently asked questions
How accurate are the calculators?
They use exact decimal arithmetic rather than floating-point maths, so money results are correct to the cent. Each page explains the formula it uses.
Can I share a calculation?
Yes. The numbers you enter are kept in the page address, so copying the link (or using “Share this calculation”) opens the same result for anyone.
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