Time Zone Converter

What this tool does

Pick a date and time in any city around the world, and see the equivalent wall-clock time in every other zone you care about. Daylight saving transitions, half-hour and 45-minute offsets, and historical timezone rules are all resolved by your browser using the IANA time zone database — so the answer matches what a calendar app would show on that exact day.

How to convert times across zones

Pick the date and time you want to convert. The field starts on your local now, so for quick "what time is it for them?" lookups you can just change the source zone.
Choose the source zone — that's where the wall-clock time you typed actually happens.
Read off the equivalent time in every active zone in the list. The source row is highlighted, and each row shows the current UTC offset (handy for DST edge cases).
Add more zones from the dropdown, or remove ones you don't need with the × button.
Adjust the date or time and the whole list updates instantly — no reloads, no API calls.

How the offsets are computed

A wall-clock time is meaningless without a zone, so the converter first anchors your input to the source zone's UTC offset for that exact moment (DST included), then projects the resulting absolute instant into every target zone. Two passes are used near DST boundaries so that times like 02:30 on a spring-forward day land on the correct side of the transition.

About the time zones list

The default list covers the most common business and travel hubs: New York, Los Angeles, London, Paris, São Paulo, Tokyo, Sydney, Mumbai/Kolkata and Dubai, anchored by UTC. Your local zone is auto-detected and added to the top so you always have a familiar reference point. Add or remove zones freely — they're remembered only for the current session.

Frequently asked questions

Does it handle daylight saving time correctly?

Yes. The browser uses the IANA time zone database, which knows the DST rules for every region historically and going forward. So if you pick March 13 02:30 in New York on a spring-forward day, the tool resolves the offset just like a calendar app would.

Why does the offset show UTC+5:30 or UTC+5:45?

Several time zones don't sit on whole-hour offsets — India is UTC+5:30, Nepal is UTC+5:45, parts of Australia use 9:30 and 8:45. The converter shows the exact offset rather than rounding, which matters for scheduling calls.

Is my local zone added automatically?

Yes. We detect it via your browser and add it to the source dropdown and active list, so you always have a reference point. If you're on a VPN or your system clock is off, you can still pick any zone manually.

Does anything get sent to a server?

No. All the conversion logic runs in your browser. You can confirm by opening DevTools > Network — typing a date or switching zones fires no requests. Safe to use with internal meeting times.

Why doesn't my favourite city appear?

We curate the list to the most-used hubs; everything else maps to a nearby major city in the same zone. If your local zone isn't in the list, it's auto-added at the top. The IANA zone IDs (e.g. Europe/Madrid, America/Sao_Paulo) are shown beside each label.

Can I share a converted time?

Copy the resulting wall-clock string from any row, or send the source date plus the source zone — anyone opening the same converter and typing those will get the matching equivalents in their own zones. ISO 8601 with offset (e.g. 2026-05-06T15:00-04:00) is the unambiguous form for emails and calendar invites.

Time Zone Converter