BST to GMT Converter

Category: Time Zone Converters

- July 01, 2025

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British Summer Time (BST)

UTC+1 • London, Edinburgh, Cardiff

Conversion Settings

Configure your timezone conversion preferences

Auto Convert

Daylight Saving Aware

Show UTC Offset

Greenwich Mean Time (GMT)

UTC+0 • London, Dublin, Lisbon

--:--:--

Select a time to convert

Time Difference: --

UTC Offset (BST): +01:00

UTC Offset (GMT): +00:00

DST Status: --

BST/GMT Time: --

GMT Time: --

Time Format:

Current BST/GMT: --:--:--

Current GMT: --:--:--

🇬🇧 BST (UTC+1) is used during British Summer Time from March to October. GMT (UTC+0) is used during winter months and is the standard time zone.

BST to GMT Conversion Guide

What is BST to GMT Conversion?

BST to GMT conversion helps you translate time between British Summer Time and Greenwich Mean Time zones. BST is UTC+1 during British Summer Time (March to October), while GMT is always UTC+0 and serves as the standard time zone for the UK during winter months.

Time Zone Information

British Summer Time (BST): Used in the UK during daylight saving time from late March to late October. Always UTC+1 during this period.

Greenwich Mean Time (GMT): The standard time zone for the UK during winter months. Always UTC+0 and serves as the baseline for world time zones.

Time Difference: BST is 1 hour ahead of GMT. During winter, the UK observes GMT (no time difference).

Daylight Saving Time Impact

Summer Period (BST): Last Sunday in March to last Sunday in October - BST is 1 hour ahead of GMT

Winter Period (GMT): Last Sunday in October to last Sunday in March - No time difference (both GMT)

Transition Times: Clocks change at 1:00 AM GMT/2:00 AM BST on transition dates

Common Conversion Examples

Summer Period (BST Active)

BST 12:00 PM → GMT 11:00 AM

BST 6:00 PM → GMT 5:00 PM

BST is 1 hour ahead of GMT during summer

Winter Period (GMT Only)

GMT 12:00 PM → GMT 12:00 PM

GMT 6:00 PM → GMT 6:00 PM

No time difference during winter months

Business Hours

BST 9:00 AM → GMT 8:00 AM

BST 5:00 PM → GMT 4:00 PM

Standard UK business hours conversion

International Scheduling

BST Noon → GMT 11:00 AM

BST Midnight → GMT 11:00 PM (prev day)

Important for global coordination

Conversion Tips & Best Practices

• BST begins on the last Sunday in March at 1:00 AM GMT (clocks spring forward to 2:00 AM BST)

• BST ends on the last Sunday in October at 2:00 AM BST (clocks fall back to 1:00 AM GMT)

• GMT is the reference point for all other time zones worldwide

• During winter months, UK time is effectively GMT with no daylight saving adjustment

• Always check if the UK is currently observing BST or GMT when scheduling international meetings

• GMT remains constant year-round, making it reliable for scientific and navigation purposes

Convert Between British Summer Time and GMT

Need to match a UK meeting time with a GMT-based calendar? Or maybe you're trying to plan an event that falls right around the seasonal switch? This BST to GMT converter helps make those shifts much easier to manage. Below is a quick snapshot of where BST and GMT apply around the world, so you can see what aligns with your needs at a glance.

BST (UTC+1)	GMT (UTC+0)
🇬🇧 United Kingdom (March to October) 🇮🇪 Ireland (Seasonally) 🇵🇹 Portugal (Mainland, Seasonally) 🇫🇴 Faroe Islands (Seasonally) 🇲🇦 Morocco (During DST overlap)	🇬🇧 United Kingdom (October to March) 🇮🇪 Ireland (Winter) 🇵🇹 Portugal (Winter) 🇮🇸 Iceland (Year-round) 🇬🇲 The Gambia 🇬🇭 Ghana 🇬🇳 Guinea 🇬🇼 Guinea-Bissau 🇱🇷 Liberia 🇲🇱 Mali 🇲🇷 Mauritania 🇲🇦 Morocco (Standard Time) 🇸🇳 Senegal 🇸🇱 Sierra Leone 🇹🇬 Togo 🇸🇭 Saint Helena

Why Use This Time Converter?

If you’ve ever missed a call because someone said “2 PM London time” and you weren’t sure if that meant BST or GMT, this is for you. The UK switches between two time zones each year, and that one-hour difference can really trip up your schedule. This converter clears that up fast. It handles the seasonal shifts, knows if daylight saving is active, and shows the exact time difference.

Using the Converter Is Pretty Straightforward

Step 1: Pick a Date and Time

Start by choosing the date and time you want to convert. There’s a calendar input for the date and a clock input for the time. No need to worry about seconds unless you want to turn them on later.

Step 2: Choose Your Starting Time Zone

Use the dropdown to select whether you're starting in BST/GMT (UK time) or GMT (universal time). The default is BST/GMT, but you can swap it any time.

Step 3: Tap Convert

Click the convert button and the result shows instantly. You’ll see the time and date in the other zone, with clear labels so you know what you’re looking at.

Step 4: Check the Details

Below the main time result, you’ll get some extras like:

The time difference
Whether Daylight Saving Time is active
UTC offsets for both zones

More Than Just a Simple Flip

Switching Zones Made Easy

Hit the "Swap" button and your input and output zones will flip. The converter updates everything accordingly, so you don't have to re-enter anything.

Auto-Convert While You Type

If you check the "Auto Convert" box, the tool will instantly calculate as you change the date or time. No extra clicks needed.

Smart About Daylight Saving

The converter knows when the UK is on BST or GMT. It automatically factors in the last Sundays in March and October, which is when the switch happens. You can also toggle whether DST should be considered with the "Daylight Saving Aware" setting.

Show or Hide UTC Offsets

Turn on the "Show UTC Offset" option and you’ll see how many hours ahead or behind each zone is from UTC. That’s useful if you’re coordinating with other global locations.

Set the Clock to Now

One tap on the "Now" button fills in the current time in your chosen input zone. From there, you can convert instantly or tweak the time a little.

Reset If Things Get Messy

Not sure where you left off? The "Reset" button takes you back to the default settings and current time. Clean slate, ready to start again.

12-Hour or 24-Hour Clock

Use the format toggle to switch between 12-hour and 24-hour time. Whatever feels easier to read is fair game.

What If You’re Coordinating Across Continents?

Imagine you're organizing a team meeting with colleagues in Accra, Ghana (which stays on GMT all year), and others in London, where the time shifts with the seasons. Scheduling in September? London is on BST, so 3 PM London is 2 PM in Accra. This converter helps you spot that instantly, with no mental math or calendar checking required.

Let This Tool Handle the Shifting Hours for You

Whether you're juggling business calls, travel plans, or international livestreams, keeping up with the UK's time changes doesn't have to be a headache. With this converter, you get the current time, future schedules, and past conversions in a way that's easy to understand. It's here whenever you need it, and it does all the timezone math without making you guess.