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ConvertCalculate

41 free tools

Time & Date Tools

Convert time zones, count the days between dates, work out an exact age and run timers. Daylight saving comes from the IANA database, not from an assumption.

NewTimezone ConverterConvertCalculate’s Time Zone Converter lets you instantly convert times across cities worldwide, handling daylight saving changes and 12/24-hour formats for accurate global scheduling.Open NewTime nowTime Now – Check the Current Time Anywhere InstantlyOpen NewPomodoro TimerBoost productivity with the Pomodoro Timer by ConvertCalculate, helping you manage focused work sessions, reduce distractions, and efficiently balance work and breaks for optimal performance.Open NewStopwatchTrack elapsed time accurately with ConvertCalculate’s Stopwatch, offering precise timing for workouts, tasks, and events, ensuring you never miss a second.Open NewCountdown TimerSet precise countdown timers for tasks, reminders, or events to boost productivity, manage deadlines efficiently, and never miss important moments. This tool helps you stay organized, focused, and on track throughout your day.Open NewAge CalculatorCalculate your exact age in years, months and days from your date of birth, plus total days, weeks and your next birthday.Open NewDate CalculatorCount the days between two dates, including weekdays, or add and subtract days, weeks, months and years from a date.Open

Timezone Converter — quick conversions

Date Calculator — quick conversions

In short

Convert between time zones with automatic daylight saving, check the current time anywhere, and use a stopwatch, countdown or Pomodoro timer.

Overview

Time zones, daylight saving and calendar arithmetic cause more scheduling mistakes than anything else. These tools read the IANA time zone database, so daylight saving is handled for the actual date rather than assumed.

Which one do you need?

All 41 tools in this section are free, work on a phone, and keep what you type on your own device. Nothing is stored and there is no sign-up.

Time & Date Tools: frequently asked questions

Why does the time difference between two cities change?

Because countries start and end daylight saving on different dates, and some never use it at all. India stays at UTC+5:30 all year while the US moves twice, so the gap between them shifts by an hour in March and November.

What is the difference between EST and EDT?

They are the same place at different times of year: EST is standard time (UTC−5) from November to March, EDT is daylight time (UTC−4) from March to November. Writing 'Eastern Time' avoids picking the wrong one.

Do the timers keep running if I switch tabs?

Yes. They measure against the system clock rather than counting ticks, so the time left is correct even when the browser throttles a background tab.