SGT to GMT Time Converter
GMT is 7 hours behind SGT. SGT is UTC+8:00, and The UK and Ireland are currently on BST (UTC+1:00).
Best Time to Call Between SGT and GMT
Both zones are inside normal business hours between 4:00 PM and 5:00 PM SGT — that's 9:00 AM to 10:00 AM GMT. That's a 1-hour window.
both at work SGT only GMT only neither — hours along the strip are SGT.
Common Times Converted
SGT on the left, GMT on the right.
SGT to GMT: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| SGT | GMT | Working hours |
|---|---|---|
| 12:00 AM | 5:00 PM prev day | — |
| 1:00 AM | 6:00 PM prev day | — |
| 2:00 AM | 7:00 PM prev day | — |
| 3:00 AM | 8:00 PM prev day | — |
| 4:00 AM | 9:00 PM prev day | — |
| 5:00 AM | 10:00 PM prev day | — |
| 6:00 AM | 11:00 PM prev day | — |
| 7:00 AM | 12:00 AM | — |
| 8:00 AM | 1:00 AM | — |
| 9:00 AM | 2:00 AM | SGT only |
| 10:00 AM | 3:00 AM | SGT only |
| 11:00 AM | 4:00 AM | SGT only |
| 12:00 PM | 5:00 AM | SGT only |
| 1:00 PM | 6:00 AM | SGT only |
| 2:00 PM | 7:00 AM | SGT only |
| 3:00 PM | 8:00 AM | SGT only |
| 4:00 PM | 9:00 AM | Both zones |
| 5:00 PM | 10:00 AM | GMT only |
| 6:00 PM | 11:00 AM | GMT only |
| 7:00 PM | 12:00 PM | GMT only |
| 8:00 PM | 1:00 PM | GMT only |
| 9:00 PM | 2:00 PM | GMT only |
| 10:00 PM | 3:00 PM | GMT only |
| 11:00 PM | 4:00 PM | GMT only |
What SGT and GMT Actually Are
SGT — Singapore Time
Singapore. Standing at UTC+8:00 as written, and the region does not change its clocks, so that offset holds all year.
Singapore sits at a longitude that would put it near UTC+7, but moved to UTC+8 in 1982 to align with Malaysia and Hong Kong — a trade decision rather than a solar one.
GMT — Greenwich Mean Time
The UK and Ireland in winter, plus Iceland, Portugal and much of West Africa. Standing at UTC as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, October 25, 2026, to GMT. Often used loosely as a synonym for UTC. They differ by less than a second, so for scheduling they are interchangeable.
Britain ran an experiment from 1968 to 1971 on permanent UTC+1, abandoning GMT entirely. It was scrapped after complaints about dark winter mornings in Scotland.
What This Means in Practice
This gap is not fixed
GMT changes its clocks and SGT does not, so the difference between them moves by an hour twice a year. A recurring meeting set now will drift for one side from Sunday, October 25, 2026 unless someone resets it.
Major Cities in Each Zone
Cities on SGT
Cities on GMT
Frequently Asked Questions
What is the time difference between SGT and GMT?
GMT is 7 hours behind SGT. That is the live figure. Taken strictly as written, the gap between SGT and GMT is 8 hours — the two differ because at least one of these regions is currently on daylight saving.
What is 9:00 AM SGT in GMT?
9:00 AM SGT is 2:00 AM GMT.
What are the best hours to schedule a call between SGT and GMT?
Between 4:00 PM and 5:00 PM SGT, which is 9:00 AM to 10:00 AM GMT. Both sides are inside normal business hours through that window.
Does the difference between SGT and GMT change during the year?
Yes. GMT observes daylight saving and SGT does not, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, October 25, 2026.
Does GMT always mean Greenwich Mean Time?
Often used loosely as a synonym for UTC. They differ by less than a second, so for scheduling they are interchangeable.