Free Time Zone Converter: Compare Times Across the World

You need to schedule a meeting with someone in London, another person in Tokyo, and your team in New York. What time works for everyone? Instead of doing the math in your head (and probably getting it wrong because of daylight saving time), use the time zone converter and see all the times side by side.

How the Time Zone Converter Works

Pick a time and date in one time zone, and the tool instantly shows you what that time is in any other zone you select. You can add as many time zones as you need — three, five, ten — and they all update together. Change the time in one zone and every other zone adjusts automatically.

It handles daylight saving time transitions too, which is honestly the main reason I use this instead of just adding or subtracting hours. DST changes on different dates in different countries, so the offset between two cities isn't always the same throughout the year.

Why Time Zone Math Is Harder Than It Looks

You'd think converting between time zones is simple subtraction. New York is UTC-5, London is UTC+0, so the difference is five hours, right? Except when the US switches to daylight saving time and the UK hasn't yet. Then it's four hours. Then the UK switches too and it's back to five. Then the US falls back first and... you get the idea.

And that's just two Western time zones. Add India (UTC+5:30 — yes, the half hour matters) or Nepal (UTC+5:45) and manual calculations become error-prone fast.

Finding Meeting Times That Work

The converter is perfect for finding overlap between time zones. Add all the relevant zones, then look for windows where everyone is in their working hours. For New York to Tokyo, the overlap is tiny — maybe early morning New York, late evening Tokyo. Knowing the exact times helps you find the least painful option.

I use this every week for calls with clients overseas. Instead of saying "is 3pm my time good?" and making them calculate, I check the converter first and propose a time that's reasonable for both sides. Small courtesy, big difference.

Daylight Saving Time Alerts

The tool flags when DST transitions are coming up, so you don't schedule a recurring meeting and then wonder why someone's an hour late two weeks later. If you're setting up a weekly call across time zones, check the converter around March and November when most DST changes happen.

Need to coordinate across time zones? Try it free →