BST to BRT Converter
Start by searching for a time zone, city, or town.
Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
12:00 pm12:00 GMT (UTC+0), Oct 29, 2026 = 9:00 am09:00 BRT (UTC-3), Oct 29, 2026
GMT is 3 hours ahead of BRT.
BST and BRT examples
These examples always use BST (UTC+1) and BRT (UTC-3). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
BST is 4 hours ahead of BRT.
How the time difference changes
For most of the year, BST is 4 hours ahead of BRT. From Oct 25, 2026 to Mar 28, 2027, GMT is 3 hours ahead of BRT.
For most of the year, working hours of 9:00 am to 6:00 pm in BST correspond to 5:00 am to 2:00 pm in BRT. At other times of the year, working hours of 9:00 am to 6:00 pm in GMT correspond to 6:00 am to 3:00 pm in BRT.For most of the year, working hours of 09:00 to 18:00 in BST correspond to 05:00 to 14:00 in BRT. At other times of the year, working hours of 09:00 to 18:00 in GMT correspond to 06:00 to 15:00 in BRT.
Compare BST time with BRT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Greenwich Mean Time is 3 hours ahead of Brasilia Time.
12:00 pm12:00 in GMT is 9:00 am09:00 in BRT
GMT to BRT call time
Best time for a conference call or a meeting is between 12pm-6pm12:00-18:00 in GMT which corresponds to 9am-3pm09:00-15:00 in BRT
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
9:00 am09:00 Brasilia Time (BRT). Offset UTC -3:00 hours
12:00 pm12:00 GMT / 9:00 am09:00 BRT
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
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British Summer Time
Offset: BST is 1 hour ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Guernsey, Isle of Man, Jersey, United Kingdom
Principal Cities: The largest city in the BST time zone is London in the United Kingdom, with about 8.962 million people. Other major cities in this time zone include Birmingham, Glasgow, Manchester, Sheffield.
Greenwich Mean Time (GMT) originally referred to the mean solar time at the Royal Observatory in Greenwich, London. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, and in casual use the two are the same. In the military, GMT is known as Zulu time. Greenwich Mean Time was the same as Universal Time (UT), a standard astronomical concept used in many technical fields, until the introduction of UTC in 1972.
Current time in the United Kingdom: UK time now
Today the shaded areas are on UTC+0 (GMT).
BST representations, usage and related time zones
- +01 - basic short
- +0100 - basic
- +01:00 - extended
- +0100 - sign character (+) followed by a four digit time providing hours (01) and minutes (00) of the offset. Indicates an offset of one hour to the east of the zero meridian.
- Alpha - Military abbreviation for BST
- A - short form of 'Alpha'
- Europe/Belfast
- Europe/Guernsey
- Europe/Isle_of_Man
- Europe/Jersey
- Europe/London
- GB
- GB-Eire
- British Summer Time - UTC +1
- Bangladesh Standard Time - UTC +6
- Bougainville Standard Time - UTC +11
- BST - British Summer Time
- CET - Central European Time
- IST - Irish Standard Time
- WEST - Western European Summer Time
- A - Alpha Time Zone
- CET - Central European Time
- MEZ - Mitteleuropäische Zeit
- WAT - West Africa Time
- WST - Western Sahara Summer Time
- BMT - Biel Mean Time
Brasilia Time
Offset: BRT is 3 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Brazil
Principal Cities: The largest city in the BRT time zone is São Paulo in Brazil, with about 12.4 million people. Other major cities in this time zone include Rio de Janeiro, Belo Horizonte, Salvador, Fortaleza.
Daylight Saving: Clocks in Brasilia Time (BRT) do not change for daylight saving time, so BRT stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
BRT representations, usage and related time zones
- -03 - basic short
- -0300 - basic
- -03:00 - extended
- -0300 - sign character (-) followed by a four digit time providing hours (03) and minutes (00) of the offset. Indicates an offset of three hours to the west of the zero meridian.
- Papa - Military abbreviation for BRT
- P - short form of 'Papa'
- ADT - Atlantic Daylight Time
- PMT - Pierre & Miquelon Standard Time
- PMST - Pierre & Miquelon Standard Time
- AMST - Amazon Summer Time
- ART - Argentina Time
- BRT - Brasilia Time
- CLST - Chile Summer Time
- FKST - Falkland Islands Summer Time
- FKT - Falkland Islands Time
- GFT - French Guiana Time
- P - Papa Time Zone
- PYST - Paraguay Summer Time
- PYT - Paraguay Time
- SRT - Suriname Time
- UYT - Uruguay Time