Free Time Zone Converter: Compare Times Across the World

You need to set up a meeting with someone in London, someone in Tokyo, and your team in New York. When is a good time for everyone? Don't try to figure it out in your head (you'll probably get it wrong because of daylight saving time).

Instead, use the time zone converter to see all the times next to each other.

How the time zone converter works

You can choose a date and time in one time zone, and the tool will instantly tell you what that time is in any other time zone you choose. You can add as many time zones as you want—three, five, ten—and they will all update at the same time.

You can change the time in one zone, and all the other zones will change automatically.

It also takes care of the changes for daylight saving time, which is honestly the main reason I use this instead of just adding or taking away hours. Different countries have different dates for daylight saving time, so the time difference between two cities isn't always the same all year. Why math with time zones is harder than it looks You'd think that changing time zones is just a matter of subtracting.

London is UTC+0 and New York is UTC-5, so the time difference is five hours. Except when the UK hasn't switched to daylight saving time yet and the US has.

Then it's four hours.

Then the UK changes too, and it's back to five. Then the US goes back first, and you get the idea. And that's only two time zones in the West.

If you add India (UTC+5:30—yes, the half hour matters) or Nepal (UTC+5:45), it gets hard to do the math by hand quickly. Finding Times That Work for Meetings The converter is great for figuring out when two time zones are the same.

Add all the important zones, and then look for times when everyone is at work.

There isn't much overlap between New York and Tokyo, maybe early morning New York and late evening Tokyo. Knowing the exact times will help you find the option that hurts the least. I use this every week to talk to clients in other countries.

Instead of asking, "Is 3 p.m. my time good?" and making them do the math, I check the converter first and suggest a time that works for both sides. A small act of kindness can make a big difference.

Alerts for Daylight Saving Time The tool lets you know when DST changes are coming up, so you don't set up a meeting every week and then wonder why someone is an hour late two weeks later.

Check the converter in March and November, when most DST changes happen, if you're setting up a weekly call across time zones. Need to work together across different time zones?

Give it a shot for free.