Everyday calculators
Dates, units, journeys, grades and the small sums of ordinary life.
Age CalculatorExact age in years, months and days — plus every other unit.Date Difference CalculatorTime between two dates, in every unit, with or without weekends.Date Add & Subtract CalculatorAdd or subtract days, weeks, months or years from a date.Time Duration CalculatorHours and minutes between two times, with breaks deducted.Unit ConverterLength, weight, temperature, volume, area and speed.Fuel Cost CalculatorWhat a journey costs in fuel, and per person when shared.Speed, Distance & Time CalculatorSolve for any one of the three, plus pace.GPA CalculatorWeighted grade point average on a 4.0 scale.Random Number GeneratorRandom integers in a range, with or without duplicates.Sleep CalculatorBedtimes and wake times aligned to 90-minute sleep cycles.