Everyday calculators
Small calculations you need in the moment, built to open fast and answer immediately on a phone.
- DiscountSale price after one discount or several — which do not add up the way people expect.
- TipTip, total and an even split per person — with rounding options.
- Sales TaxAdd sales tax to a price, or work backwards from a total to find the tax.
- Date DifferenceDays between two dates, in days, weeks, months and working days.
- AgeExact age in years, months and days, plus the countdown to the next birthday.
- PercentageEvery common percentage question in one place, including change and reverse.
- BMIBody mass index in either unit system, with what it can and cannot tell you.
- PacePace, time or distance for running, walking and cycling, with split times.
- Electricity CostWhat an appliance costs to run, including the standby draw people forget.
- Download TimeHow long a file takes at a given speed, with bits and bytes handled correctly.
- TimeAdd and subtract hours, minutes and seconds, and see what time it will be after.
- CaloriesEstimate how many calories you need a day from your age, height, weight and activity, with your BMR and an optional macro split.
- Dog AgeConvert your dog’s age to human years three ways side by side: the AVMA guideline, the UC San Diego DNA formula and the 7× rule.
- Due DateEstimate your due date from the first day of your last period, with weeks pregnant and the dates of early, full and late term.