GMT to WIB Time Converter
WIB is 6 hours ahead of GMT. The UK and Ireland are currently on BST (UTC+1:00), and WIB is UTC+7:00.
Best Time to Call Between GMT and WIB
Both zones are inside normal business hours between 9:00 AM and 11:00 AM GMT — that's 3:00 PM to 5:00 PM WIB. That's a 2-hour window.
both at work GMT only WIB only neither — hours along the strip are GMT.
Common Times Converted
GMT on the left, WIB on the right.
GMT to WIB: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| GMT | WIB | Working hours |
|---|---|---|
| 12:00 AM | 6:00 AM | — |
| 1:00 AM | 7:00 AM | — |
| 2:00 AM | 8:00 AM | — |
| 3:00 AM | 9:00 AM | WIB only |
| 4:00 AM | 10:00 AM | WIB only |
| 5:00 AM | 11:00 AM | WIB only |
| 6:00 AM | 12:00 PM | WIB only |
| 7:00 AM | 1:00 PM | WIB only |
| 8:00 AM | 2:00 PM | WIB only |
| 9:00 AM | 3:00 PM | Both zones |
| 10:00 AM | 4:00 PM | Both zones |
| 11:00 AM | 5:00 PM | GMT only |
| 12:00 PM | 6:00 PM | GMT only |
| 1:00 PM | 7:00 PM | GMT only |
| 2:00 PM | 8:00 PM | GMT only |
| 3:00 PM | 9:00 PM | GMT only |
| 4:00 PM | 10:00 PM | GMT only |
| 5:00 PM | 11:00 PM | — |
| 6:00 PM | 12:00 AM next day | — |
| 7:00 PM | 1:00 AM next day | — |
| 8:00 PM | 2:00 AM next day | — |
| 9:00 PM | 3:00 AM next day | — |
| 10:00 PM | 4:00 AM next day | — |
| 11:00 PM | 5:00 AM next day | — |
What GMT and WIB Actually Are
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.
WIB — Western Indonesian Time
Jakarta, Surabaya, Bandung, Medan. Standing at UTC+7:00 as written, and the region does not change its clocks, so that offset holds all year. Indonesia spans three zones: WIB (UTC+7), WITA (UTC+8) and WIT (UTC+9).
Indonesia spans three time zones. A long-running proposal to unify the country onto a single clock has repeatedly stalled.
What This Means in Practice
This gap is not fixed
GMT changes its clocks and WIB 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 GMT
Cities on WIB
Frequently Asked Questions
What is the time difference between GMT and WIB?
WIB is 6 hours ahead of GMT. That is the live figure. Taken strictly as written, the gap between GMT and WIB is 7 hours — the two differ because at least one of these regions is currently on daylight saving.
What is 9:00 AM GMT in WIB?
9:00 AM GMT is 3:00 PM WIB.
What are the best hours to schedule a call between GMT and WIB?
Between 9:00 AM and 11:00 AM GMT, which is 3:00 PM to 5:00 PM WIB. Both sides are inside normal business hours through that window.
Does the difference between GMT and WIB change during the year?
Yes. GMT observes daylight saving and WIB 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.
Does WIB always mean Western Indonesian Time?
Indonesia spans three zones: WIB (UTC+7), WITA (UTC+8) and WIT (UTC+9).