Turn a India Standard Time reading into Coordinated Universal Time. The panels show both clocks live, and the roller lets you line up any IST time against its UTC equivalent.
India Standard Time
Coordinated Universal Time
United Kingdom Time
THE CLOCKS ABOVE ALWAYS SHOW THE LIVE CURRENT TIME. THE ROLLER BELOW IS A LOOKUP TOOL — ROTATING IT NEVER CHANGES THEM.
IST is 5 hours 30 minutes ahead of UTC
GMT/BST is 1 hour ahead of UTC
India is 4 hours 30 minutes ahead of United Kingdom
| IST | UTC | Date |
|---|---|---|
| 05:30 | 00:00 | Same day |
| 06:30 | 01:00 | Same day |
| 07:30 | 02:00 | Same day |
| 08:30 | 03:00 | Same day |
| 09:30 | 04:00 | Same day |
| 10:30 | 05:00 | Same day |
| 11:30 | 06:00 | Same day |
| 12:30 | 07:00 | Same day |
| 13:30 | 08:00 | Same day |
| 14:30 | 09:00 | Same day |
| 15:30 | 10:00 | Same day |
| 16:30 | 11:00 | Same day |
| 17:30 | 12:00 | Same day |
| 18:30 | 13:00 | Same day |
| 19:30 | 14:00 | Same day |
| 20:30 | 15:00 | Same day |
| 21:30 | 16:00 | Same day |
| 22:30 | 17:00 | Same day |
| 23:30 | 18:00 | Same day |
| 00:30 | 19:00 | Previous day in UTC |
| 01:30 | 20:00 | Previous day in UTC |
| 02:30 | 21:00 | Previous day in UTC |
| 03:30 | 22:00 | Previous day in UTC |
| 04:30 | 23:00 | Previous day in UTC |
India Standard Time is the local clock in India. Converting it to UTC removes the local offset so the time can be shared with anyone in the world without ambiguity — which is exactly why UTC is used for servers, aviation and international scheduling.
India Standard Time covers the whole country from a single meridian near Mirzapur (82.5° E), which is why the offset lands on a half hour rather than a full hour.
Subtract the current offset shown in the offset panel from the local IST time. If the result goes below 00:00, UTC is still on the previous date. Use the roller to read the pairing directly instead of doing the arithmetic.
IST has no daylight saving changes, so the offset to UTC is stable all year. It is still calculated live from the Asia/Kolkata IANA database rather than hard-coded.
Early-morning or late-night local times frequently sit on a different UTC date. The converter labels every selection as SAME DAY, NEXT DAY or PREVIOUS DAY so a deadline written in UTC is never off by 24 hours.
India does not use daylight saving time. IST stays at UTC +05:30 every day of the year, so a conversion you learn in January still works in July.