Istanbul Time to GMT Converter
GMT is 3 hours behind TRT. 9:00 AM TRT = 6:00 AM GMT.
GMT is 3 hours behind TRT. To convert Istanbul Time to GMT, subtract 3 hours from the Istanbul Time time: 9:00 AM TRT = 6:00 AM GMT.
Istanbul Time (Istanbul time) is used in Istanbul, Turkey. GMT (GMT) is used in Same offset as UTC. The UK and Ireland use GMT in winter; Iceland, Ghana and Senegal all year.
The UK is on GMT only in winter; in summer it uses BST (UTC+1).
Istanbul Time to GMT time conversion table
Istanbul Time to GMT on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| Istanbul Time | GMT | Day |
|---|---|---|
| 12:00 AM TRT | 9:00 PM GMT | previous day |
| 1:00 AM TRT | 10:00 PM GMT | previous day |
| 2:00 AM TRT | 11:00 PM GMT | previous day |
| 3:00 AM TRT | 12:00 AM GMT | night |
| 4:00 AM TRT | 1:00 AM GMT | night |
| 5:00 AM TRT | 2:00 AM GMT | night |
| 6:00 AM TRT | 3:00 AM GMT | night |
| 7:00 AM TRT | 4:00 AM GMT | night |
| 8:00 AM TRT | 5:00 AM GMT | night |
| 9:00 AM TRT | 6:00 AM GMT | — |
| 10:00 AM TRT | 7:00 AM GMT | — |
| 11:00 AM TRT | 8:00 AM GMT | — |
| 12:00 PM TRT | 9:00 AM GMT | work hours |
| 1:00 PM TRT | 10:00 AM GMT | work hours |
| 2:00 PM TRT | 11:00 AM GMT | work hours |
| 3:00 PM TRT | 12:00 PM GMT | work hours |
| 4:00 PM TRT | 1:00 PM GMT | work hours |
| 5:00 PM TRT | 2:00 PM GMT | — |
| 6:00 PM TRT | 3:00 PM GMT | — |
| 7:00 PM TRT | 4:00 PM GMT | — |
| 8:00 PM TRT | 5:00 PM GMT | — |
| 9:00 PM TRT | 6:00 PM GMT | — |
| 10:00 PM TRT | 7:00 PM GMT | — |
| 11:00 PM TRT | 8:00 PM GMT | — |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert Istanbul Time to GMT
Subtract 3 hours from the Istanbul Time time to get GMT.
Example: 9:00 AM TRT = 6:00 AM GMT.
Across midnight: 1:00 AM TRT = 10:00 PM GMT (previous day). The date changes, so always check the day as well as the hour.
Time difference between Istanbul Time and GMT
The time difference between Istanbul Time and GMT is 3 hours all year – GMT is behind TRT.
Istanbul Time and GMT during daylight saving time
- Istanbul Time does not observe daylight saving time; it stays on UTC+3 all year.
- GMT does not observe daylight saving time; it stays on UTC+0 all year.
Best time for a meeting between Istanbul Time and GMT
Istanbul Time and GMT share 5 hours of the 9 AM–5 PM working day. Any time between 12:00 PM and 5:00 PM TRT lands between 9:00 AM and 2:00 PM GMT, inside working hours for both.
Istanbul Time to GMT FAQ
What is the time difference between Istanbul Time and GMT?
GMT is 3 hours behind TRT all year. 9:00 AM TRT = 6:00 AM GMT.
What is 9 AM Istanbul Time in GMT?
9:00 AM TRT is 6:00 AM GMT.
What is 12 PM (noon) Istanbul Time in GMT?
12:00 PM TRT is 9:00 AM GMT.
Is GMT ahead of or behind Istanbul Time?
GMT is 3 hours behind TRT, so it is earlier in GMT than in Istanbul Time.
Does Istanbul Time change for daylight saving time?
No. Istanbul Time stays on the same offset all year, so conversions never shift for daylight saving time.
Does GMT change for daylight saving time?
No. GMT stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between Istanbul Time and GMT?
Istanbul Time and GMT share 5 hours of the 9 AM–5 PM working day. Any time between 12:00 PM and 5:00 PM TRT lands between 9:00 AM and 2:00 PM GMT, inside working hours for both.
Related conversions
Convert GMT to Istanbul Time
Convert Istanbul Time to other time zones
Convert other time zones to GMT
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.