London time to Istanbul time
Istanbul is 3 hours ahead of London in January and 2 hours ahead of in July (London BST/UTC+01:00 in summer; Istanbul GMT+3/UTC+03:00). Enter a London time below to convert it, or leave it blank to see the current time in both cities.
How to use the London to Istanbul time
- Type a London time (24-hour) and optionally a date, or leave blank for now.
- Click Convert.
- Read the Istanbul time and the working-hours table.
Time difference between London and Istanbul
Istanbul is 3 hours ahead of London in January and 2 hours ahead of in July. London observes daylight saving time and Istanbul does not, so the difference changes twice a year. London uses Europe/London time (UTC+00:00 in January, UTC+01:00 in July); Istanbul uses Europe/Istanbul (UTC+03:00 in January, UTC+03:00 in July).
Working week in London and Istanbul
London: Office hours 09:00–17:30, weekend Saturday–Sunday. Clocks go forward on the last Sunday of March (BST, UTC+1) and back on the last Sunday of October (GMT).
Istanbul: Turkey stays on UTC+3 all year (no daylight saving since 2016). Weekend Saturday–Sunday; office hours 09:00–18:00.
Quick conversion table (summer difference)
| London | Istanbul |
|---|---|
| 08:00 | 10:00 |
| 09:00 | 11:00 |
| 10:00 | 12:00 |
| 12:00 | 14:00 |
| 14:00 | 16:00 |
| 16:00 | 18:00 |
| 18:00 | 20:00 |
| 20:00 | 22:00 |
| 22:00 | 00:00 (next day) |
Table uses the July difference; the tool above applies the exact rule for any date.
Best time to call between London and Istanbul
Within normal office hours (09:00–18:00) in both cities: 9:00–15:00 London time. For a compromise outside that window, the fairest slots are the ones nearest each side's start or end of day, alternating who takes the inconvenient hour.
Reverse
Need the other direction? See Istanbul to London, or the general time zone converter.
Frequently asked questions
How many hours ahead is Istanbul from London?
Istanbul is 3 hours ahead of London in January and 2 hours ahead of in July.
When it is 12:00 noon in London, what time is it in Istanbul?
14:00 in summer (); use the tool for a specific date.
Does the converter handle daylight saving?
Yes, for the exact date you enter, using the IANA time-zone rules in your browser.
Privacy
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Last updated 2026-09-23.