Calculators
Passwords, UUIDs, QR codes, and random data
Percentage Calculator
Three calculations in one place: find a percentage of a number, work out what percent one value is of another, and measure percentage increase or decrease between two figures.
Time Duration Calculator
Four calculations in one place: how long between two times, how long between two dates, what time it will be after a duration, and the sum of several durations. Shifts over midnight are handled for you.
Time Zone Calculator
Search 70 cities, move any moment between two of them, watch both clocks tick side by side, and find the hours when your working days actually overlap. Daylight saving is taken from your browser's own time zone data, so the answer stays right all year.
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