Calculators

Everyday maths for money, study, health and time.

Practical calculators for the numbers that come up in real life: loan repayments, exam grades, percentages, attendance and more. Each one shows the formula it used and explains the result, so you can check the working rather than trust a black box.

Most used

Percentage CalculatorWork out percentages, increases, decreases and 'what percent of'.

Age CalculatorFind an exact age in years, months, days — and the next birthday.

EMI CalculatorMonthly instalment, total interest and a full repayment schedule.

BMI CalculatorBody mass index in metric or imperial, with the healthy weight range.

Scientific CalculatorTrigonometry, logs, powers and parentheses with a full history.

All calculators