London
Johannesburg
Convert GMT to SAST
Greenwich Mean Time to South Africa Standard Time — Johannesburg is 1 hour ahead of London
Quick Facts
Time Difference
+1 hours
GMT Full Name
Greenwich Mean Time
SAST Full Name
South Africa Standard Time
GMT to SAST Conversion Table
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About GMT and SAST Time Zones
GMT (Greenwich Mean Time) is UTC+0 and covers cities like London, Dublin, Lisbon. SAST (South Africa Standard Time) is UTC+2 and covers cities like Johannesburg, Cape Town, Durban.
When it's 12:00 PM (noon) in London (GMT), it's 1:00 PM in Johannesburg (SAST). The time difference between GMT and SAST is 1 hour — Johannesburg is ahead of London.
With only a 2-hour difference, London and Johannesburg share nearly a full business day overlap, making scheduling straightforward.
Use our world clock tool to compare London and Johannesburg with a visual timeline, or browse more timezone conversions.
Frequently Asked Questions
What is the time difference between GMT and SAST?
Johannesburg (SAST) is 1 hour ahead of London (GMT). The offset is +1 hours.
Is SAST ahead or behind GMT?
SAST is 1 hour ahead of GMT. GMT is UTC+1 and SAST is UTC+2.
When it's 12:00 PM in London, what time is it in Johannesburg?
When it's 12:00 PM (noon) in London (GMT), it's 1:00 PM in Johannesburg (SAST).
When it's 5:00 PM in London, what time is it in Johannesburg?
When it's 5:00 PM in London (GMT), it's 6:00 PM in Johannesburg (SAST).