All time tools

24 tools for timing, calculations, work, dates, time zones, and rates.

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24 tools

Timers4

Online timer

Start a free online timer in seconds, or count down to a clock time in any time zone.
Countdown to a date

Create an editable countdown to an event with an exact date, time, and time zone.
Stopwatch with laps

Measure elapsed time with a free stopwatch, pause controls, and split laps.
Work & rest interval timer

Repeat work and rest intervals for exercise, focus sessions, or practice.

Time calculator

Add, subtract, multiply, or divide hours, minutes, and seconds without converting them by hand.
Sum durations

Add a list of times to find a playlist, agenda, or total task duration.
Time between clock readings

Calculate the hours and minutes between two clock times, including overnight periods.
Time unit converter

Convert seconds, minutes, hours, fixed days, and weeks.
Start / finish time calculator

Find a finish time from a duration, or work backwards to a starting time.

Work hours calculator

Calculate working time after unpaid breaks for a daytime or overnight shift.
Weekly timesheet

Total a weekly timesheet with daily breaks, overnight shifts, and CSV export.
Decimal hours converter

Convert hours and minutes to decimal hours, or decimal hours back to clock time.

Date difference calculator

Find the number of calendar days, months, and years between two dates.
Add or subtract dates

Move a calendar date forward or back by days, months, and years.
Business days calculator

Count working days using your own working week and excluded dates.
Weekday finder

Find which day of the week a date falls on, with its day of the year.
ISO week number

Find the ISO week number, week year, and weekday for a date.

Time zone converter

Convert a dated clock time between cities, including daylight-saving changes.
Meeting time overlap planner

Find half-hour meeting slots within working hours across two to four time zones.

Playback speed calculator

Calculate video, podcast, or audiobook listening time at any playback speed. See the new duration, time saved or added, and worked examples.
Speech duration estimate

Estimate speaking time from a word count and an adjustable delivery rate.
Running pace calculator

Calculate average running pace per kilometre or mile and average speed.
Render time calculator

Estimate animation render time from frame count, seconds per frame, parallel workers, and overhead. See worked examples and planning limits.
Frames to seconds calculator

Convert frames to seconds, minutes, and hours at your chosen FPS. Compare common frame rates, use custom values, and see worked examples.