All online calculators
Pick a calculator below. Each page explains the formula, gives a worked example and answers common questions.
Everyday calculators
- Percentage Calculator Work out a percentage of a number, find what percent one value is of another, or measure the percentage chang...
- Age Calculator Pick a date of birth and, if you like, a different date to measure to. The calculator returns exact age in ye...
- Discount Calculator Enter the original price and the percentage off. Add a second discount if the store stacks offers, and sales...
- Tip Calculator Enter the bill, choose a tip percentage and say how many people are sharing. The calculator shows the tip, th...
Finance calculators
- Loan EMI Calculator Enter the amount you want to borrow, the yearly interest rate and the loan term. You get the monthly instalme...
- Mortgage Calculator Enter the home price, your down payment, the interest rate and the term. Add yearly property tax and insuranc...
- Compound Interest Calculator Enter a starting balance, a monthly contribution, the yearly rate and how long you will invest. The result sh...
- Profit Margin Calculator Enter what an item costs you and what you sell it for. You get gross profit, gross margin and markup, and the...