Convert GMT/BST to UTC

UK time (GMT/BST) to Coordinated Universal Time (UTC)

When it's 12:00 PM in London, it's 11:00 AM UTC

On Jan 1 – Mar 28, 2026; Oct 25, 2026 – Mar 27, 2027; Oct 31 – Dec 31, 2027: 12:00 PM UTC.

GMT/BST UTC±0 / UTC+1 UTC UTC±0 -1/+0h

Interactive Converter

Pick any time and date to convert between GMT/BST and UTC.

Full 24-hour comparison. Business hours (9 AM -- 6 PM) are highlighted.

These times apply on all dates in 2026–2027 except:

Jan 1 – Mar 28, 2026; Oct 25, 2026 – Mar 27, 2027; Oct 31 – Dec 31, 2027: UTC times are 1 hour later.

Top meeting times for teams in GMT/BST and UTC (9 AM -- 6 PM work hours, 1-hour meeting).

12a

12p

London

UTC

Overlap

Everyone available

Most available

Some overlap

Outside work hours

1 2:00 PM -- 3:00 PM in London

London: 2:00 PM UTC: 1:00 PM

All members within working hours. Everyone in mid-day range.

9.7 / 10

2 1:00 PM -- 2:00 PM in London

London: 1:00 PM UTC: 12:00 PM

All members within working hours. Everyone in mid-day range.

9.3 / 10

3 3:00 PM -- 4:00 PM in London

London: 3:00 PM UTC: 2:00 PM

All members within working hours. Everyone in mid-day range.

9.3 / 10

These times apply on all dates in 2026–2027 except:

Jan 1 – Mar 28, 2026; Oct 25, 2026 – Mar 27, 2027; Oct 31 – Dec 31, 2027: UTC times are 1 hour later.

The GMT/BST to UTC gap is -1h or +0h, depending on daylight saving time. The table lists each period.

Dates	London	UTC	Difference
Jan 1 – Mar 28, 2026	UTC±0	UTC±0	+0h
Mar 29 – Oct 24, 2026	UTC+1	UTC±0	-1h
Oct 25, 2026 – Mar 27, 2027	UTC±0	UTC±0	+0h
Mar 28 – Oct 30, 2027	UTC+1	UTC±0	-1h
Oct 31 – Dec 31, 2027	UTC±0	UTC±0	+0h