Core Time Calculators

10 free calculators in this category — no sign-up required.

Add or subtract hours, minutes, and seconds to get an exact running total. Useful for stacking multi…

Find out exactly how much time passed between a start and an end point — in hours, minutes, and seco…

Calculate the exact difference between two points in time, including the date, so you can compare mo…

Turn a clock-in and clock-out time into a clean total in hours and minutes — the simplest way to che…

Add or subtract minutes quickly, with automatic conversion to hours once the total passes 60.…

Add or subtract seconds and instantly see the equivalent in minutes and hours — useful for lap times…

Convert between standard hours-and-minutes format and decimal hours — the format most payroll and in…

Convert a standard hours:minutes time into its decimal equivalent — the fastest way to prep hours fo…

Convert a decimal hour value back into hours and minutes — the reverse of the Time to Decimal Calcul…

Convert between 12-hour (AM/PM) and 24-hour military time instantly, in either direction.…

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Casio Digital Desk Clock

A no-frills desk clock with a large, easy-read display.

Handy for checking the time without unlocking a phone mid-task.

Multi-Function Digital Watch

12/24-hour display, stopwatch, and alarms on one wrist.

Pairs well with manual time tracking when you're away from a screen.