Calculators
Deterministic maths for dates, durations, money and everyday percentages.
7 tools
Age CalculatorCalculate exact age in years, months and days, total elapsed units and the next birthday countdown.Hours CalculatorAdd up shift durations with break deductions and get decimal hours for invoicing.Percentage CalculatorSolve percentage of a number, what percent one value is of another, and percentage change.Average CalculatorMean, median, mode, range and standard deviation for a list of numbers.Loan CalculatorMonthly repayment, total interest and payoff totals for an amortising loan.Sales Tax CalculatorAdd or remove tax from a price at any rate, with the tax portion shown separately.BMI CalculatorBody mass index in metric or imperial units with the standard category bands.