ET to GMT Converter

Category: Time Zone Converters

- July 03, 2025

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Eastern Time (ET)

UTC-5/UTC-4 • New York, Toronto, Atlanta

Conversion Settings

Configure your timezone conversion preferences

Auto Convert

Daylight Saving Aware

Show UTC Offset

Show Seconds

Greenwich Mean Time (GMT)

UTC+0 • London, Dublin, Reykjavik

--:--:--

Select a time to convert

Time Difference: --

UTC Offset (ET): -5/-4

UTC Offset (GMT): +0

DST Status: --

ET Time: --

GMT Time: --

Time Format:

Current ET: --:--:--

Current GMT: --:--:--

🌍 Eastern Time is UTC-5 (EST) in winter and UTC-4 (EDT) in summer. GMT is UTC+0 and never changes. Time difference varies between 4-5 hours.

ET to GMT Conversion Guide

What is ET to GMT Conversion?

ET to GMT conversion helps you translate time between Eastern Time and Greenwich Mean Time. Eastern Time switches between EST (UTC-5) in winter and EDT (UTC-4) in summer due to daylight saving time. GMT is UTC+0 and remains constant year-round. The time difference varies between 4-5 hours depending on the season.

Time Zone Information

Eastern Standard Time (EST): Used in winter months (November-March). Always UTC-5, making GMT 5 hours ahead.

Eastern Daylight Time (EDT): Used in summer months (March-November). Always UTC-4, making GMT 4 hours ahead.

Greenwich Mean Time (GMT): The world time standard based on the Royal Observatory in Greenwich, London. Always UTC+0.

Daylight Saving Time Impact

DST Begins: Second Sunday in March at 2:00 AM, clocks spring forward to 3:00 AM (EST to EDT)

DST Ends: First Sunday in November at 2:00 AM, clocks fall back to 1:00 AM (EDT to EST)

GMT Consistency: GMT never observes daylight saving time and remains constant throughout the year

Common Conversion Examples

Winter (EST to GMT)

EST 9:00 AM → GMT 2:00 PM

EST 5:00 PM → GMT 10:00 PM

5-hour difference during standard time

Summer (EDT to GMT)

EDT 9:00 AM → GMT 1:00 PM

EDT 5:00 PM → GMT 9:00 PM

4-hour difference during daylight time

International Business

EDT 10:00 AM → GMT 2:00 PM

EST 10:00 AM → GMT 3:00 PM

Meeting coordination varies by season

Date Boundaries

EDT 11:00 PM → GMT 3:00 AM (next day)

EST 10:00 PM → GMT 3:00 AM (next day)

Late evening times cross date boundaries

Conversion Tips & Best Practices

• Eastern Time automatically switches between EST and EDT based on daylight saving rules

• Add 5 hours to EST or 4 hours to EDT to get GMT time

• GMT is equivalent to UTC and is used as the global time reference

• Pay attention to date changes when converting late evening or early morning times

• GMT is also known as "Zulu time" in aviation and military contexts

• Always verify DST status for accurate conversions during transition periods

ET to GMT Time Converter

Whether you're coordinating a meeting between New York and London or setting a deadline that spans continents, this ET to GMT Time Converter helps you keep everything aligned. Before jumping into how to use it, here’s a quick glance at which countries fall under each time zone:

Eastern Time (ET)	Greenwich Mean Time (GMT)
🇺🇸 United States 🇨🇦 Canada 🇧🇸 Bahamas 🇭🇹 Haiti 🇰🇾 Cayman Islands 🇯🇲 Jamaica 🇹🇨 Turks and Caicos Islands	🇬🇧 United Kingdom 🇮🇪 Ireland 🇮🇸 Iceland 🇬🇲 The Gambia 🇬🇭 Ghana 🇸🇱 Sierra Leone 🇱🇷 Liberia 🇹🇬 Togo 🇧🇫 Burkina Faso 🇨🇮 Côte d'Ivoire 🇬🇳 Guinea 🇬🇼 Guinea-Bissau 🇲🇱 Mali 🇲🇷 Mauritania 🇸🇳 Senegal 🇸🇭 Saint Helena

Why This Converter Stands Out for Cross-Timezone Planning

This tool doesn’t just flip numbers. It keeps track of daylight saving time, lets you see the difference in hours between Eastern Time and GMT, and updates everything live as you change your input. You can use it for one-off conversions or keep it running to track both zones in real time.

Let’s say you work from Atlanta and have daily sync-ups with a team in Dublin. This calculator lets you punch in your local time and instantly see what it looks like across the ocean, even factoring in the oddities of daylight time changes.

Using the Converter Step-by-Step

1. Choose Your Time

Start by selecting a date and time in the Eastern Time zone or GMT, depending on which is your starting point. You can choose either by using the dropdown to swap zones.

2. Check the Conversion Settings

The tool gives you some helpful toggles:

Auto Convert: As soon as you change your input, the result updates without extra clicks.
Daylight Saving Aware: Adjusts for DST automatically, so you don’t have to guess if it’s EDT or EST.
Show UTC Offset: Adds the UTC offset for each zone, if you prefer to see it numerically.
Show Seconds: Toggle seconds in the output if precision matters to you.

3. Click or Let It Auto-Update

If you turned off auto-convert, just hit the "Convert Time" button. You'll see the converted time, date, and the current difference in hours, clearly displayed.

4. Swap, Reset, or Use “Now”

Swap: Switches your input and output zones in one click.
Now: Fills in your current time instantly so you can check what time it is somewhere else right this second.
Reset: Takes you back to the default setup with today’s date and local time.

Helpful Extras for Regular Users

Format Toggle

Prefer military time? Just switch the format to 24-hour with a single tap. You can flip between 12-hour and 24-hour as needed.

Live Clocks

Two real-time clocks run just below the format button, always showing the current ET and GMT time so you can compare at a glance.

Conversion Memory

If you already converted a time and decide to change your format or toggle a setting, the tool updates the result automatically, so there’s no need to re-enter anything.

Common Questions This Tool Helps Answer

Does it handle Daylight Saving Time correctly? Yes. It uses accurate rules for US Eastern Time so you won’t get caught off guard by the time jump in March or November.
Can I see what the offset is right now? Turn on "Show UTC Offset" and you’ll get the exact offset displayed next to both zones.
What if I want to check multiple dates quickly? Use the auto-convert feature, then just scroll through the calendar and your results update in real time.
What happens with times late at night? The tool adjusts for date boundaries too. A 10 PM ET time can turn into 3 AM the next day in GMT and the converter makes that clear.

Where It Comes in Handy

Here’s an example. Say you're working in Jamaica and trying to set up a webinar for people in Ireland. Both countries observe different daylight policies, and your best guess might be off by an hour. Using this calculator, you plug in 7 PM Jamaica time, hit convert, and immediately see that it’s either midnight or 11 PM in Dublin, depending on the time of year. No mental math, no timezone mix-ups.

Stay in Sync Between East Coast and Greenwich

Scheduling doesn’t have to be a headache. This ET to GMT Time Converter is built to do one thing really well, make sure you and whoever you're working with show up at the right time. Whether you’re setting deadlines, running a livestream, or joining a call across the pond, this tool keeps it simple, accurate, and clear every time you use it.