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World Time Lab
  • Explore time around EarthWorld Clock

    See the live globe, local clocks, and places around the world.

    • Live World ClockExplore day, night, time zones, and pinned places.
    • Time by CitySearch current local time in cities worldwide.
    • Time by CountrySee every civil time zone used by a country.
    • Distance Between CitiesMeasure great-circle distance on a real globe.
    • Day & Night WidgetAdd the live day and night map to another site.
    About & dataAbout World Time LabMethodology & Data SourcesReport an ErrorContact
  • Convert and coordinateTime Zones

    Translate city times, UTC offsets, and abbreviations without guesswork.

    • Time Zone ConverterCompare cities, PST, WAT, UTC offsets, and more in one view.
    • Meeting Time FinderFind working-hour overlap across as many as six locations.
    • Time Zone Conversion ChartsBrowse quick reference tables for common zone pairs.
    About & dataAbout World Time LabMethodology & Data SourcesReport an ErrorContact
  • Follow the skySun & Moon

    Track sunlight, moon phases, eclipses, and the changing seasons.

    • Sunrise & SunsetFind solar times and day length for any listed city.
    • Moon PhasesSee the live Moon, moonrise, moonset, and phase calendar.
    • Solar & Lunar EclipsesExplore upcoming eclipses and local visibility.
    • Equinoxes & SolsticesUnderstand the tilt, sunlight, and season changes.
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  • Plan dates your wayCalendars & Dates

    Build calendars, count days, and answer practical date questions.

    • 2026 CalendarBrowse the full year with week numbers and holidays.
    • Printable Calendar MakerCustomize columns, colors, logos, holidays, PDF, and ICS.
    • Date CalculatorsAdd dates, count days, find weekdays, and check weeks.
    • Days Between DatesCalculate an exact calendar difference.
    • Add or Subtract a DateMove forward or backward by a duration.
    • Days UntilCreate or browse live event countdowns.
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  • Measure every momentTimers

    Count down, measure laps, or test your reaction speed.

    • Online TimerCount down or up with speed, precision, and optional sound.
    • StopwatchMeasure elapsed time and visual lap splits.
    • Reaction Time TestMeasure keyboard or tap response in milliseconds.
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  • Experiment with a worldPlanet Lab

    Change a planet, inspect the physics, and explore what-if scenarios.

    • Planet SimulatorBuild a world and see computed physical changes.
    • All What-If ScenariosBrowse climate, orbit, impact, and ocean experiments.
    • Snowball EarthFollow ice-albedo feedback across Earth.
    • Runaway GreenhouseExplore an illustrated Venus-like end state.
    • Asteroid ImpactReplay a staged impact, shock ring, and crater.
    • Mega-TsunamiWatch teaching wavefronts cross an ocean.
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Explore World Time Lab

Tools & guides

    • Live World Clock
    • Time by City
    • Time by Country
    • Distance Between Cities
    • Day & Night Widget
    • Time Zone Converter
    • Meeting Time Finder
    • Time Zone Conversion Charts
    • Sunrise & Sunset
    • Moon Phases
    • Solar & Lunar Eclipses
    • Equinoxes & Solstices
    • 2026 Calendar
    • Printable Calendar Maker
    • Date Calculators
    • Days Between Dates
    • Add or Subtract a Date
    • Days Until
    • Online Timer
    • Stopwatch
    • Reaction Time Test
    • Planet Simulator
    • All What-If Scenarios
    • Snowball Earth
    • Runaway Greenhouse
    • Asteroid Impact
    • Mega-Tsunami
About & data
About World Time LabMethodology & Data SourcesReport an ErrorContact
In this sectionTimers
Time tools
  • Online Timer
  • Stopwatch
  • Reaction Time Test
Timer presets
  • 1 Minute Timer
  • 2 Minute Timer
  • 3 Minute Timer
  • 5 Minute Timer
  • 10 Minute Timer
  • 15 Minute Timer
  • 20 Minute Timer
  • 25 Minute Timer
  • 30 Minute Timer
  • 45 Minute Timer
  • 60 Minute Timer
  • 90 Minute Timer
Home/Timer

Animated online timer

Count down to zero, or count up to a target. Repeat it, name it, and keep it.

Timer directionFinish at zero
Playback speed

Real time: one timer second equals one real second. Alarm sound is off by default. The visual timer will still finish normally.

Ready to count down

10:00

Starts at 10:00 and drains to zero

Repeat and save

Repeat

Name the current duration to keep it here. Saved timers stay in this browser on this device only, up to 8 of them, and starting one loads its direction and repeat setting too.

Space start, pause, or resume

The 60 fixed beads divide the whole target into equal parts. Countdown beads go dark; count-up beads light clockwise. At 1× the exact wall-clock deadline remains the source of truth. Other speeds are simulations for rehearsal and testing. Everything stays on this device.

Timer ready.

What the dial is showing

Sixty stable beads divide the whole interval into equal parts while one marker follows actual elapsed time. You can set up to 365 days, reveal milliseconds, change playback speed for a clearly labeled simulation, or turn on the optional alarm sound, which stays off by default.

Repeat runs the same target again as soon as it finishes, and the round number is shown beside the phase so you always know which repetition is running. Saved timers keep a name, a duration, a direction, and a repeat setting in this browser on this device.

Common questions

Will the alarm still fire if I switch tabs?

Alarm sound is off by default. Turn it on before the timer finishes when you want the triple beep. The timer stores the exact end time rather than counting interval ticks, so the display catches up after normal background throttling. Browsers can suspend inactive tabs and cannot run an alarm after a tab is closed, so keep this tab open when the alarm matters.

What does Count up do?

Count up starts at zero and stops automatically at the days, hours, minutes, and seconds you set. Use the stopwatch when you want open-ended timing instead of a fixed target.

What does playback speed change?

At 1×, timer time and real time match. Other speeds deliberately simulate time faster or slower. For example, a 10 minute timer at 10× reaches its alarm in one real minute. The current speed and estimated real duration stay visible above the dial.

Can a timer repeat, and can I save it with a name?

Yes. Repeat runs the same target 2, 3, 4, 5, or 10 times, or until you stop it, and the round counter above the dial says which repetition is running. When a round would last under two seconds of real time, which a very short target or a fast playback speed can do, the rounds change quietly: the beep and the spoken update would be cut off before either could be heard, so the round number carries it instead. Give the current duration a name and Save timer keeps it, together with its direction and repeat setting, in this browser on this device. Saved timers are never uploaded, up to eight are kept, and clearing your browser data removes them.

Why did I not hear the beep?

Sound starts off to avoid surprising you. Turn on Alarm sound above the dial before the timer finishes. If your device is muted or the tab's sound is blocked, the visual "Time's up!" still appears. When sound is on, "Beep again" can replay the alarm.

One-tap timers

  • 1 minute timer
  • 2 minute timer
  • 3 minute timer
  • 5 minute timer
  • 10 minute timer
  • 15 minute timer
  • 20 minute timer
  • 25 minute timer
  • 30 minute timer
  • 45 minute timer
  • 60 minute timer
  • 90 minute timer
Animated stopwatch with lapsReaction time testCountdowns to holidaysDate calculators
World clock globeTime zone converterMeeting Time FinderTime by countryTime by cityConverter pagesSunrise and sunsetMoon phasesEclipsesSeasonsPlanet LabCalendarPrintable calendar makerDate calculatorsCountdownsTimerStopwatchReaction timeDistanceEmbeddable widget
AboutMethodology & data sourcesReport an errorContactPrivacyCookiesTerms

World Time Lab shows live day and night across the planet. Sun positions are computed with standard NOAA solar equations, and local times come from your browser's own IANA time zone database, so every calculation on this site runs on your device. This build loads no advertising, no analytics, and no third-party scripts at all, and asks for no account. It never asks where you are unless you press "Use my location" on an eclipse page, and that reading stays in your browser. The privacy page explains what that does and does not cover.

© 2026 World Time Lab · this build shipped July 24, 2026. Times are shown to the minute and can differ by a minute or two from horizon observations. Time zone boundaries derived from the timezone-boundary-builder project (ODbL); map shapes from Natural Earth; named administrative boundaries from geoBoundaries gbOpen with source years and licenses varying by country. City search data © GeoNames under CC BY 4.0, transformed for prefix search and updated July 2026. Seasons view climate groups derived from the Kottek et al. Koeppen-Geiger world map (2006). World Time Lab v2026.7.5.