Calc Hub

Percentages, loans, BMI, conversions — the numbers you keep looking up.

Standard CalculatorAdd, subtract, multiply and divide. Keyboard friendly.PercentagePercent of a number, share of a total, or percent change.Tip SplitterTip amount, total, and what each person owes.DiscountSale price after a percentage off, with optional tax.Loan PaymentMonthly repayment, total interest and total repaid.Compound InterestWhat savings grow to, with optional monthly deposits.BMIBody mass index in metric or imperial, with a healthy range.Length ConverterMillimetres to miles and everything between.TemperatureCelsius, Fahrenheit and Kelvin at once.AgeExact age in years, months and days, plus the next birthday.Date DifferenceDays, weekdays and hours between two dates.

About the Calc Hub

The Calc Hub covers the numbers people look up constantly: what a monthly loan repayment works out to, what a percentage change actually is, how much each person owes when a bill is split, what a sale price comes to after tax, how old someone is in exact years, months and days. Each calculator updates as you type — there is no Calculate button to press — and each shows its working where the working matters, like the total interest on a loan rather than just the comfortable monthly figure.

Questions

Which currency do the finance tools use?

None — amounts are formatted as plain numbers with no symbol, so they work in any currency. Enter dinars, dollars or euros and read the answer in the same unit.

Do I need to press a calculate button?

No. Every calculator recalculates on each keystroke, so you can drag a figure up and down and watch the result move.

Are the results saved?

No. Nothing is stored or sent anywhere — refresh the page and the fields are empty again.