GMT to EST Converter
Convert Greenwich Mean Time (GMT/BST) to Eastern Standard Time (EST/EDT) instantly. See live clocks, convert any time, and view a full hour-by-hour comparison chart — free, no signup required.
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GMT to EST — Hour-by-Hour Comparison
| GMT (Greenwich) | EST (Eastern) |
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Frequently Asked Questions
GMT (Greenwich Mean Time) is 5 hours ahead of EST (Eastern Standard Time). This means when it is noon in London (GMT), it is 7:00 AM in New York (EST). During daylight saving time, both regions may shift, and the difference can temporarily change.
To convert GMT to EST, simply subtract 5 hours. For example: 3:00 PM GMT = 10:00 AM EST. To convert EST to GMT, add 5 hours. For example: 10:00 AM EST = 3:00 PM GMT. During EDT (daylight saving), subtract 4 hours instead.
Yes. Both the UK and the US observe daylight saving time, but they switch on different dates. When the US moves to EDT in March, the difference temporarily becomes 4 hours until the UK switches to BST. When the UK falls back in October before the US, the difference is also 4 hours briefly. For most of the year, the gap is 5 hours.
GMT cities: London, Dublin, Lisbon, Accra, Reykjavik.
EST cities: New York, Washington D.C., Miami, Atlanta, Boston.