Percentage, tax, loan, interest, investment and business calculators that show the formula alongside the answer. Every figure is computed in your browser from the numbers you enter — nothing is sent anywhere, and nothing here is financial advice.
21 of 21 tools
See how savings grow with compounding, including regular contributions.
Estimate a monthly mortgage payment including tax, insurance and deposit.
Calculate the monthly payment, total interest and full cost of a loan.
Work out a sale price, the amount saved, and what stacked discounts really come to.
Project investment growth from a lump sum and regular contributions.
Work out the tip and split the bill, with big buttons for common percentages.
Convert a salary between hourly, daily, weekly, monthly and annual.
Calculate profit margin from cost and revenue, with markup shown alongside.
Generate a full payment schedule showing principal, interest and balance.
Project retirement savings and see the gap against your target.
Add or remove sales tax at any rate, in either direction.
See what regular saving builds up to, and how long a goal will take.
Calculate return on investment, and the annualised rate that makes it comparable.
Add VAT, remove VAT, or find the VAT inside a gross amount.
Split a bill between any number of people, including tip and tax.
See how inflation changes what an amount is worth over time.
Work out what a raise is worth per year, per month and after inflation.
Calculate simple interest with the formula shown alongside the result.
Calculate a selling price from cost and markup, with the margin shown.
Find how many units you must sell to cover your costs.
Turn an hourly rate into daily, weekly, monthly and annual pay.
Create strong random passwords with full control over length and characters.
Format, validate and minify JSON, with errors that point to the exact line.
Work out any percentage — of a number, as a share, or as a change.
Find the mean, median, mode and range of a list of numbers, with the working shown.
Sample and population standard deviation and variance, both shown, with the working.
Turn a logo into favicon.ico, the PNG sizes a site needs, and the HTML to declare them.