The full toolkit

All time tools

Every converter, calculator, timer, and chart on the site — 44 tools in all, grouped into 7 categories. Search for what you need, or browse below.

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Time Format Converters 3

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24 to 12 Hour Converter Any 24-hour or military time as 12-hour AM/PM. 12 to 24 Hour Converter Turn AM/PM times into the 24-hour clock. Military Time Converter Read military time like 1430 as 2:30 PM.

Duration & Calculators 10

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Hours Calculator Hours and minutes worked between two times, with breaks. Time Duration Calculator The exact gap between two date-times. Add & Subtract Time Move a time forward or back by hours and minutes. Time Card Calculator Add a full week of shifts into one total. Time to Decimal Convert hours and minutes into decimal hours. Decimal to Time Convert decimal hours back into hours and minutes. Time Ago Calculator Find the time a set duration in the past. Time From Now Calculator Find the time a set duration in the future. Business Days Calculator Count workdays between two dates. Sleep Calculator Best bedtimes and wake-up times by sleep cycle.

Time Unit Converters 11

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Time Unit Converter Convert between any time units at once. Minutes to Hours Turn minutes into hours. Hours to Minutes Turn hours into minutes. Seconds to Minutes Turn seconds into minutes. Minutes to Seconds Turn minutes into seconds. Hours to Days Turn hours into days. Days to Hours Turn days into hours. Weeks to Days Turn weeks into days. Days to Weeks Turn days into weeks. Hours to Seconds Turn hours into seconds. Seconds to Hours Turn seconds into hours.

Time Zone Converters 4

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Time Zone Converter Convert a time between any two zones. UTC Converter Convert to and from UTC. GMT Converter Convert to and from GMT. Meeting Planner Find a time that works across zones.

Developer / Timestamp 5

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Unix Timestamp Converter Unix time to a human date and back. Epoch Converter Convert epoch timestamps to dates. ISO 8601 Converter Parse and format ISO 8601 date-times. Milliseconds to Time Turn milliseconds into readable time. Cron Expression Generator Build and read cron schedules.

Timers & Clocks 8

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Countdown Timer Count down to any date or duration. Online Timer A simple set-and-go timer. Stopwatch Start, stop, and lap an online stopwatch. World Clock Current time in cities worldwide. Online Alarm Clock Set an alarm for any time. Pomodoro Timer Focus sessions with built-in breaks. Online Clock A full-screen digital clock, 12 or 24-hour. Interval Timer Repeating intervals for workouts.

Reference & Charts 3

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Military Time Chart Every military time mapped to 12-hour. 24-Hour Clock Chart The full 24-hour to 12-hour reference. Time Zone Abbreviations What EST, PST, GMT and others mean.

Every tool here is built and reviewed by Fletcher Langley, with the method shown on each page and the examples verified by hand — see our editorial policy. Can’t find what you need? Tell us and we’ll consider building it.