UTC to IST conversion: Indian Standard Time is UTC+5:30, so add 5 hours 30 minutes to any UTC or GMT time. London is UTC+1 during British Summer Time and Central Europe UTC+1 or UTC+2. The Kalinga Times converter below handles all three, plus Unix timestamps.
Runs in your browser on its IANA time zone data, so UK and EU daylight saving is applied for the date you pick. Nothing you enter leaves your device.
UTC, GMT, BST and CET offsets to IST in 2026
| Zone | UTC offset | In use (2026) | India (IST) is ahead by |
|---|---|---|---|
| UTC | UTC+0 | all year (reference time, no daylight saving) | 5 h 30 min |
| GMT (London winter) | UTC+0 | 1 Jan – 29 Mar and 25 Oct – 31 Dec | 5 h 30 min |
| BST (London summer) | UTC+1 | 29 Mar – 25 Oct | 4 h 30 min |
| CET (Central Europe winter) | UTC+1 | 1 Jan – 29 Mar and 25 Oct – 31 Dec | 4 h 30 min |
| CEST (Central Europe summer) | UTC+2 | 29 Mar – 25 Oct | 3 h 30 min |
The UK and the EU both switch at 01:00 UTC on the last Sunday of March and the last Sunday of October: in 2026 that is 29 March and 25 October. Sources: The Summer Time Order 2002 (UK) and Directive 2000/84/EC (EU), checked 9 October 2026 against the IANA time zone database. IST has no daylight saving.
For a page focused on London, with a GMT and BST overlap table, use our gmt to ist converter.
India–Central Europe business hours overlap
India 09:00–18:00 IST, Central Europe 09:00–17:00 local; working hours in bold. The overlap is 13:30–18:00 IST in winter (CET) and 12:30–18:00 IST in summer (CEST).
| IST (India) | UTC | Frankfurt, CET (winter) | Frankfurt, CEST (summer) |
|---|---|---|---|
| 08:00 | 02:30 | 03:30 | 04:30 |
| 09:00 | 03:30 | 04:30 | 05:30 |
| 10:00 | 04:30 | 05:30 | 06:30 |
| 11:00 | 05:30 | 06:30 | 07:30 |
| 12:00 | 06:30 | 07:30 | 08:30 |
| 13:00 | 07:30 | 08:30 | 09:30 |
| 14:00 | 08:30 | 09:30 | 10:30 |
| 15:00 | 09:30 | 10:30 | 11:30 |
| 16:00 | 10:30 | 11:30 | 12:30 |
| 17:00 | 11:30 | 12:30 | 13:30 |
| 18:00 | 12:30 | 13:30 | 14:30 |
| 19:00 | 13:30 | 14:30 | 15:30 |
| 20:00 | 14:30 | 15:30 | 16:30 |
| 21:00 | 15:30 | 16:30 | 17:30 |
| 22:00 | 16:30 | 17:30 | 18:30 |
Unix timestamp to IST
A Unix timestamp counts seconds since 1 January 1970 00:00 UTC. To read it in India time, convert to UTC and add 5 h 30 min; the second box in the converter does this, and also accepts millisecond timestamps (13 digits). In a spreadsheet: =A2/86400+DATE(1970,1,1)+5.5/24, formatted as date and time.
Share your result or suggest a fix
Did the converter show a time you did not expect? Email [email protected] with the date, the places and what you expected; we check it against the IANA time zone database and note any correction with its date. Comments are switched off on this site.
FAQ
How do I convert UTC to IST?
Add 5 hours 30 minutes. For example 12:00 UTC is 17:30 IST, and 20:00 UTC is 01:30 IST the next day.
Is GMT the same as UTC?
For converting clock times, yes: both are UTC+0. London only differs from UTC during British Summer Time, when it is UTC+1.
What is CET to IST?
India is 4 h 30 min ahead of CET (winter) and 3 h 30 min ahead of CEST (summer, late March to late October).
Does IST change in summer?
No. IST stays at UTC+5:30 all year; only the European side changes.
Kalinga Times is an independent time tools site, not affiliated with the former Kalinga Times newspaper. Kalinga Times home.
Updated 9 October 2026 · Kalinga Times editorial team
Was this page helpful?
One tap tells us which guides need more detail.
Thanks for your feedback!