Converts GMT (Greenwich Mean Time) or London time to US Eastern Time. The difference varies: during winter, EST is 5 hours behind GMT. During summer, the gap narrows because the UK (BST) and US (EDT) observe daylight saving at slightly different dates.
GMT to EST Converter
Convert London time to US Eastern Time
How to GMT to EST
- 1.Enter the GMT/London time in hours and minutes.
- 2.Select a date if needed.
- 3.The Eastern Time equivalent appears instantly.
- 4.Use the swap button to convert EST to GMT.
About This Tool
Frequently Asked Questions
EST is 5 hours behind GMT. During daylight saving (EDT vs BST), it can be 4 or 5 hours depending on exact dates — the US and UK switch DST on different weekends.
For practical purposes, yes. GMT and UTC are within a second of each other. GMT is technically a time zone (Europe/London in winter), while UTC is a time standard.
If both work 9-5 local time, they overlap from 2 PM to 5 PM London time (9 AM to 12 PM New York time) — about 3 hours in winter.