UTC to GMT / BST Converter

Convert Coordinated Universal Time (UTC) to London time. The UK observes GMT (UTC+0) in winter and BST - British Summer Time (UTC+1) - from late March to late October.

LIVE CLOCK BST AWARE

Live Clocks

UTC (Coordinated Universal Time)

--

GMT / BST (London)

--

Custom Time Converter

Enter a UTC date and time to see the equivalent London (GMT/BST) time.

London (GMT/BST) Time

24-Hour Reference Table

UTC midnight-to-midnight compared to London time. The offset shown reflects the current GMT/BST status.

UTC London (GMT/BST)

How It Works

Formula

GMT = UTC+0 (Oct - Mar)
BST = UTC+1 (Mar - Oct)

Example

12:00 PM UTC = 12:00 PM GMT (winter) or 1:00 PM BST (summer)

Daylight Saving Time Note

UK observes BST (UTC+1) from the last Sunday of March to the last Sunday of October. Outside this window, the UK is on GMT (UTC+0). This converter automatically applies the correct offset based on the date you enter.

Frequently Asked Questions

UTC and GMT share the same offset (both UTC+0 in winter). However, UTC is the scientific standard maintained by atomic clocks, while GMT is a timezone identifier. In summer the UK switches to BST (UTC+1), so "London time" differs from UTC.
The UK moves to BST (UTC+1) on the last Sunday of March and returns to GMT (UTC+0) on the last Sunday of October.
The UK (in winter), Ireland, Portugal, Iceland, and several West African countries observe GMT. In summer the UK and Ireland use BST/IST (both UTC+1).
In winter (Oct - Mar), London time equals UTC. In summer (Mar - Oct), London is UTC+1 (BST).