Free Time Zone Converter Online
Convert any date and time between cities (with automatic DST handling) or fixed GMT/UTC offsets like GMT+5:30, GMT-8, IST, EST, PST, CET, JST. Includes a world clock view that shows the same moment across nine major cities.
UTCTry this example
You need to schedule a 30-minute call with a colleague in San Francisco. Your day is in Mumbai (IST). You want to know what 9:00 AM SF time is for you.
- 1Click "Use current time" to start with right now, then change the date to your meeting date.
- 2Set From to "Los Angeles (PT)" and To to "India (IST)".
- 3Edit the time portion to 09:00. The big result card now shows the matching IST time.
- 4Toggle "Show world clock" to also see what time it would be in London, Singapore, and other regions if more colleagues need to join.
How to Use
- 01Pick a date and time, or click "Use current time".
- 02Choose the source and target zones. By default these are city names with automatic DST. Toggle "Use fixed GMT offsets" if you need pure offsets like GMT+5:30 or GMT-8.
- 03Read the converted time in the big result card. Toggle the world clock to see the same moment in nine major cities at once.
FAQ
Does this handle Daylight Saving Time?▼
Yes when using city names. The tool uses your browser's built-in IANA database, which automatically applies the correct DST rules for every region and year. Switch to "Fixed GMT offsets" mode if you specifically need pure mathematical offsets that ignore DST.
When should I use city names versus GMT offsets?▼
Use city names (the default) for everyday scheduling. They are friendlier and DST-aware. Use fixed GMT offsets for technical work where the offset is part of the agreement (logging, sync windows, contractual SLAs) and you do not want behavior to shift twice a year.
Are unusual offsets like IST (GMT+5:30) or Nepal (GMT+5:45) supported?▼
Yes. The fixed offset list includes all real-world offsets from GMT-12:00 to GMT+14:00, including the half-hour and 45-minute variants used in India, Iran, Nepal, Afghanistan, Myanmar, and parts of Australia.
What is the world clock for?▼
It shows what time it is right now (or for the date you entered) across nine major cities at the same moment. Useful for scheduling meetings or checking whether colleagues in different regions are awake.
Is my data sent anywhere?▼
No. All conversions happen in your browser using native JavaScript APIs. Nothing is transmitted.