Karachi is 2 hours ahead of Istanbul for most of the year: when it is 10:00 am in Istanbul it is 12:00 pm in Karachi. In offset terms Istanbul is on UTC+03:00 and Karachi is on UTC+05:00 in January, and UTC+03:00 and UTC+05:00 in July. The converter above works from your browser’s own time zone data, so the figure it shows is the one in force today rather than the one that was in force when this page was written.
Neither city changes its clocks. Istanbul stays on UTC+03:00 and Karachi stays on UTC+05:00 all year. The difference is therefore fixed for all of 2026, which makes this one of the few city pairs where a single number is the whole answer: Karachi is always 2 hours ahead of Istanbul. Recurring meetings between the two never drift, and the table below confirms it period by period.
For arranging anything, the number that matters is the overlap. Istanbul works 09:00 to 18:00 and Karachi works 09:00 to 17:00, which leaves 09:00 to 15:00 in Istanbul — 11:00 to 17:00 in Karachi — as the window when both are open. That is 6 hours of shared working time. Both cities work Monday to Friday, so only the clock has to be reconciled.
Two local details worth knowing. Turkey moved to permanent UTC+03:00 in 2016 and no longer changes clocks, putting it an hour ahead of central Europe in winter and level in summer. Pakistan keeps UTC+05:00 all year, half an hour behind India, which is the usual source of confusion on regional calls.
The safest way to write a time for these two cities is to give both, as in "10:00 Istanbul / 12:00 Karachi", or to give the UTC offset. Abbreviations are the trap: Istanbul is on +03 for part of the year and +03 for the rest, and the same three letters are reused in other parts of the world for entirely different offsets.
The formula
local Istanbul- The time you enter, on the Istanbul clock
offset- Each city’s UTC offset at that moment, read live from the IANA time zone database in your browser
+2- The difference in hours that holds for most of 2026: Karachi is 2 hours ahead of Istanbul
day shift- Whether the converted time falls on the previous, same or next calendar day in Karachi
How it works, step by step
- Enter a time in Istanbul using the 24-hour hour box and the minute box — 15:30 is hour 15, minute 30.
- Your browser reports the UTC offset in force in Istanbul and in Karachi for that moment, so a date near a daylight saving transition is handled correctly rather than with a fixed 2 hour rule.
- The second offset minus the first gives the difference, which is added to the time you entered. A result past midnight is marked as the next or previous day, because that is where most conversion mistakes live.
- The panel also shows the current time in both cities, the date in Karachi, and whether the two offices are open at the same moment.
Worked examples
09:00 in Istanbul
09:00 in Istanbul is 11:00 in Karachi — inside Karachi office hours. In 12-hour terms, 9:00 am against 11:00 am. Both offices are open at that moment, so it is a slot either side can accept.
12:00 in Istanbul
12:00 in Istanbul is 14:00 in Karachi — inside Karachi office hours. In 12-hour terms, 12:00 pm against 2:00 pm. Both offices are open at that moment, so it is a slot either side can accept.
17:00 in Istanbul
17:00 in Istanbul is 19:00 in Karachi — after the Karachi working day has finished. In 12-hour terms, 5:00 pm against 7:00 pm. Only one of the two offices is open at that moment, so it is worth offering rather than assuming.
23:00 in Istanbul, and the date problem
23:00 in Istanbul is 01:00 in Karachi (next day). This is where conversions go wrong in writing: the time is right, the day is not, and a meeting invitation sent for "Tuesday" arrives for the wrong Tuesday. Give the date in both cities whenever the converted time is near midnight.
How to read your score
Frequently asked questions
How many hours ahead of Istanbul is Karachi?
Karachi is 2 hours ahead of Istanbul for most of 2026, so 09:00 in Istanbul is 11:00 in Karachi. That difference holds for the whole year, because the two clocks either never change or change on the same dates — the table on this page confirms it period by period.
What is 2 pm Istanbul time in Karachi?
4:00 pm, inside Karachi office hours. In 24-hour form 14:00 in Istanbul is 16:00 in Karachi, and that is a normal working moment in both cities.
What is the best time to call between Istanbul and Karachi?
Anywhere between 09:00 and 15:00 Istanbul time, which is 11:00 to 17:00 in Karachi. Both offices are open across that whole window — 6 hours of it. If you want one answer rather than a range, 12:00 in Istanbul is the middle of the overlap.
Is Karachi ahead of or behind Istanbul?
Karachi is ahead. Istanbul is at UTC+03:00 and Karachi is at UTC+05:00 in mid-January, and UTC+03:00 and UTC+05:00 in mid-July. The clock moves forward going from Istanbul to Karachi, which is why Karachi reaches the end of its working day first.
Do Istanbul and Karachi change their clocks on the same date?
Neither city changes its clocks. In 2026, Istanbul does not change its clocks at all, and Karachi does not change its clocks at all. The difference between the two cities therefore holds all year.
What do the abbreviations for Istanbul mean?
Istanbul is on +03 in winter and +03 in summer, while Karachi uses PKT and PKT. Abbreviations are the least reliable way to write a time: several are ambiguous between regions, and the summer and winter forms are an hour apart. A UTC offset, or the time given in both cities, cannot be misread.
Does this converter stay correct after the clocks change?
Yes. It does not use a stored number for the difference. Each time you change a value it asks your browser for the UTC offset that Europe/Istanbul and Asia/Karachi are on at that moment, using the IANA time zone database that ships with your operating system, and takes the difference. The tables on this page are computed from the same database for 2026.
Istanbul to Karachi: every hour, every period of 2026, and meeting slots
| Istanbul (24h) | Istanbul (12h) | Karachi (24h) | Karachi (12h) | Status |
|---|---|---|---|---|
| 00:00 | 12:00 am | 02:00 | 2:00 am | outside office hours |
| 01:00 | 1:00 am | 03:00 | 3:00 am | outside office hours |
| 02:00 | 2:00 am | 04:00 | 4:00 am | outside office hours |
| 03:00 | 3:00 am | 05:00 | 5:00 am | outside office hours |
| 04:00 | 4:00 am | 06:00 | 6:00 am | outside office hours |
| 05:00 | 5:00 am | 07:00 | 7:00 am | outside office hours |
| 06:00 | 6:00 am | 08:00 | 8:00 am | outside office hours |
| 07:00 | 7:00 am | 09:00 | 9:00 am | office hours in Karachi |
| 08:00 | 8:00 am | 10:00 | 10:00 am | office hours in Karachi |
| 09:00 | 9:00 am | 11:00 | 11:00 am | office hours in both |
| 10:00 | 10:00 am | 12:00 | 12:00 pm | office hours in both |
| 11:00 | 11:00 am | 13:00 | 1:00 pm | office hours in both |
| 12:00 | 12:00 pm | 14:00 | 2:00 pm | office hours in both |
| 13:00 | 1:00 pm | 15:00 | 3:00 pm | office hours in both |
| 14:00 | 2:00 pm | 16:00 | 4:00 pm | office hours in both |
| 15:00 | 3:00 pm | 17:00 | 5:00 pm | office hours in Istanbul |
| 16:00 | 4:00 pm | 18:00 | 6:00 pm | office hours in Istanbul |
| 17:00 | 5:00 pm | 19:00 | 7:00 pm | office hours in Istanbul |
| 18:00 | 6:00 pm | 20:00 | 8:00 pm | outside office hours |
| 19:00 | 7:00 pm | 21:00 | 9:00 pm | outside office hours |
| 20:00 | 8:00 pm | 22:00 | 10:00 pm | outside office hours |
| 21:00 | 9:00 pm | 23:00 | 11:00 pm | outside office hours |
| 22:00 | 10:00 pm | 00:00 (next day) | 12:00 am (next day) | outside office hours |
| 23:00 | 11:00 pm | 01:00 (next day) | 1:00 am (next day) | outside office hours |
Computed at a difference of 2 hours, which is the one that holds for most of 2026. During the transition windows in the table below, shift the right-hand columns by an hour.
| Period | Length | Istanbul offset | Karachi offset | Difference | Abbreviations |
|---|---|---|---|---|---|
| 01 Jan to 31 Dec | 365 days | UTC+03:00 | UTC+05:00 | +2:00 | +03 / PKT |
Every row is read from the IANA time zone database. Short periods appear where one city has changed its clocks and the other has not yet done so.
| Istanbul | 12-hour | Karachi | Verdict |
|---|---|---|---|
| 06:00 | 6:00 am | 08:00 | Outside both |
| 06:30 | 6:30 am | 08:30 | Outside both |
| 07:00 | 7:00 am | 09:00 | Too early in Istanbul |
| 07:30 | 7:30 am | 09:30 | Too early in Istanbul |
| 08:00 | 8:00 am | 10:00 | Too early in Istanbul |
| 08:30 | 8:30 am | 10:30 | Too early in Istanbul |
| 09:00 | 9:00 am | 11:00 | Good — both offices open |
| 09:30 | 9:30 am | 11:30 | Good — both offices open |
| 10:00 | 10:00 am | 12:00 | Good — both offices open |
| 10:30 | 10:30 am | 12:30 | Good — both offices open |
| 11:00 | 11:00 am | 13:00 | Good — both offices open |
| 11:30 | 11:30 am | 13:30 | Good — both offices open |
| 12:00 | 12:00 pm | 14:00 | Good — both offices open |
| 12:30 | 12:30 pm | 14:30 | Good — both offices open |
| 13:00 | 1:00 pm | 15:00 | Good — both offices open |
| 13:30 | 1:30 pm | 15:30 | Good — both offices open |
| 14:00 | 2:00 pm | 16:00 | Good — both offices open |
| 14:30 | 2:30 pm | 16:30 | Good — both offices open |
| 15:00 | 3:00 pm | 17:00 | After hours in Karachi |
| 15:30 | 3:30 pm | 17:30 | After hours in Karachi |
| 16:00 | 4:00 pm | 18:00 | After hours in Karachi |
| 16:30 | 4:30 pm | 18:30 | After hours in Karachi |
| 17:00 | 5:00 pm | 19:00 | After hours in Karachi |
| 17:30 | 5:30 pm | 19:30 | After hours in Karachi |
| 18:00 | 6:00 pm | 20:00 | Outside both |
| 18:30 | 6:30 pm | 20:30 | Outside both |
| 19:00 | 7:00 pm | 21:00 | Outside both |
| 19:30 | 7:30 pm | 21:30 | Outside both |
| 20:00 | 8:00 pm | 22:00 | Outside both |
| 20:30 | 8:30 pm | 22:30 | Outside both |
| 21:00 | 9:00 pm | 23:00 | Outside both |
| 21:30 | 9:30 pm | 23:30 | Outside both |
Office hours taken as 09:00–18:00 in Istanbul and 09:00–17:00 in Karachi, which are the customary hours in each city rather than a generic nine to five.