All time tools

Every clock, timer, converter and calculator on onlineclock.app. All free, with no sign-up.

• Online clockBig digital clock with seconds, full screen, themes.
• Flip clockRetro flip-card clock for a second screen.
• StopwatchLap times to 1/100 second. Space to start and stop.
• Countdown timerSet minutes or hours. Alarm sound when it ends.
• Alarm clockWake-up alarm with snooze and four sounds.
• Pomodoro timer25-minute focus blocks with automatic breaks.
• World clockLive time in any city, side by side.
• Time around the worldLive time in 56 major cities, grouped by continent.
• Time zone converterConvert a time between any two zones.
• Time differenceHours between two cities, with a full table.
• US time zonesMap of every US zone and what time zone each state is in.
• Current time by cityLive local time in 2,870 major cities, plus search for 170,000+ towns.
• Military time converter24-hour time to 12-hour time and back.
• Hours from nowWhat time it will be in a set number of hours.
• Work hours calculatorWeekly time card with breaks, overtime and pay.
• Date calculatorDays between dates, or add days to a date.
• Age calculatorExact age in years, months and days.
• Today's dateDate, week number, day of the year, leap year.
• Unix timestampCurrent epoch time and a two-way converter.
• Moon phaseTonight's moon, illumination and next full moon.
• Sunrise and sunsetSunrise, sunset and daylight for your location.
• Countdown to a dateCount down to any date and share the link.
• Clock widgetFree live clock to embed on your website.
• Time zone abbreviationsWhat EST, PST, GMT, CET, IST and others mean.
• Day and night mapLive world map showing where the sun is up.
• World time zone mapLive map of every time zone, with the time anywhere you point.
• Analog clockLive wall clock with a sweeping second hand.
• Exact timeThe time to the millisecond, and how far off your clock is.
• Atomic clockAtomic time now, and how atomic clocks work.
• 24-hour clockLive clock in 24-hour format with a conversion chart.
• Time calculatorAdd and subtract hours, minutes and seconds.
• Interval timerWork/rest rounds for HIIT, Tabata and EMOM.
• Chess clockTwo-player game clock with increment.
• Learn to tell timeClock-reading game for kids, five levels.
• What week is it?Today's week number and week tables.
• 2027 calendarPrintable calendar with holidays and week numbers.
• Daylight saving timeWhen clocks change in 2026 and 2027, everywhere.
• What's my time zone?Your time zone, UTC offset and next clock change.
• Stock market hoursWhich exchanges are open now, in your time.
• Time zones by countryHow many time zones every country has.
• Classroom timerBig visual countdown ring for teachers.
• Zulu timeCurrent UTC and military time zone letters.
• Keeping TimeThe history of time in ten chapters, from bone calendars to atomic clocks.
• Learn about timeUTC vs GMT, leap seconds, the date line and more.
• Christmas countdownDays, hours and minutes until Christmas.
• New Year countdownLive countdown to midnight on January 1.
• Thanksgiving countdownDays until US Thanksgiving.
• Halloween countdownDays until October 31.