Calculators
Free online calculators for money, health, dates and everyday maths. Every calculator runs in your browser, shows its working, and explains what the result actually means.
Popular calculators
The ones people reach for most.
- Age CalculatorWork out an exact age in years, months and days from any date.Open
- Average CalculatorGet the mean, median, mode and range of any list of numbers.Open
- BMI CalculatorCheck body mass index in metric or imperial units.Open
- Compound Interest CalculatorSee how savings grow with compounding and regular contributions.Open
- Date CalculatorAdd or subtract days from a date, or count days between dates.Open
- Discount CalculatorWork out a sale price and exactly how much you save.Open
Browse by topic
Every calculator in the directory, grouped by what it helps you work out.
Money & finance
Loans, savings, pricing and the cost of borrowing.
Health & fitness
Body metrics and energy numbers, in metric or imperial.
Everyday maths
Percentages, averages and the quick sums you keep redoing.
Dates & time
Durations, deadlines, ages and working hours.
Measurement
Areas, quantities and unit-aware sizing.
Calculators A–Z
Jump straight to a letter, or open the full alphabetical directory.
Letters shown in grey have no calculators yet. Open the full A–Z directory to see all 26 in one list.