GMT to UTC Time Converter
Use this GMT to UTC time converter to compare United Kingdom and UTC time instantly. UTC is 0 hours equal to GMT, so 9:00 AM GMT becomes 9:00 AM UTC and 5:00 PM GMT becomes 5:00 PM UTC. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.
GMT to UTC Quick Facts
Use this GMT to UTC converter to compare United Kingdom and Universal time, check the 0 hours gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 9:00 AM GMT / 9:00 AM UTC.
How to Convert GMT to UTC
Converting between Greenwich Mean Time and Coordinated Universal Time means no offset adjustment — here's how to do it in under 10 seconds with no sign-up.
Pick the date and time in Greenwich Mean Time (UTC +0) that you want to convert. Hit "Now" to load the current GMT time instantly, or use "+1h" to step forward and compare.
The equivalent Coordinated Universal Time (UTC +0) time appears immediately. Since UTC is 0 hours behind of GMT, most daytime conversions stay on the same calendar day.
Click "Copy Time" to grab the UTC result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — useful when Daylight Saving Time changes the gap.
Why Choose Our GMT to UTC Converter
When someone in Universal suggests 9:00 AM GMT, that's 9:00 AM UTC. This converter shows the overlap so both sides agree on one slot — no back-and-forth.
Late-night GMT times can land on a different date in UTC because of the 0 hours offset. The converter labels "next day" or "previous day" next to the result so you never send a message a day early or miss a deadline.
Daylight Saving adjustments can widen or narrow the GMT–UTC gap by an hour. During transition weeks many people get it wrong. This converter pulls the current UTC offsets automatically, so the result is right even on the changeover day.
Product launches, sports matches, and webinars are often announced in GMT. Convert the event time to UTC so you know exactly when to tune in — since both zones share the same offset, no conversion is needed but this tool confirms it instantly.
GMT to UTC Time Conversion Chart
Quick-reference conversion table covering every hour of the day at a glance.
Greenwich Mean Time to Coordinated Universal Time full day schedule
| Greenwich Mean Time | Coordinated Universal Time |
|---|---|
| 12:00 AM |
12:00 AM
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| 1:00 AM |
1:00 AM
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| 2:00 AM |
2:00 AM
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| 3:00 AM |
3:00 AM
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| 4:00 AM |
4:00 AM
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| 5:00 AM |
5:00 AM
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| 6:00 AM |
6:00 AM
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| 7:00 AM |
7:00 AM
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| 8:00 AM |
8:00 AM
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| 9:00 AM |
9:00 AM
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| 10:00 AM |
10:00 AM
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| 11:00 AM |
11:00 AM
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| 12:00 PM |
12:00 PM
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| 1:00 PM |
1:00 PM
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| 2:00 PM |
2:00 PM
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| 3:00 PM |
3:00 PM
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| 4:00 PM |
4:00 PM
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| 5:00 PM |
5:00 PM
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| 6:00 PM |
6:00 PM
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| 7:00 PM |
7:00 PM
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| 8:00 PM |
8:00 PM
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| 9:00 PM |
9:00 PM
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| 10:00 PM |
10:00 PM
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| 11:00 PM |
11:00 PM
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Timezone offsets and DST rules verified against the IANA Time Zone Database. Conversion math and business-hour overlap windows double-checked against real-world scheduling scenarios.
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