Time Difference: London to Johannesburg

Summary

See the current time in London and Johannesburg side by side, with the live UTC offset (SAST is UTC+2, no DST), updated every second.

How it works

1. Your browser reads the current moment from your device clock.
2. It converts that moment to Europe/London time using the IANA timezone database built into modern browsers.
3. The same moment is converted to Africa/Johannesburg time (SAST, UTC+2).
4. The UTC offsets of both cities are compared to calculate the exact hour difference.
5. All three values — London time, Johannesburg time, and the offset — refresh every second.
6. When London switches between GMT and BST, the displayed offset adjusts automatically from +2 to +1 hour.

Use cases

• Scheduling video calls between London and Johannesburg offices.
• Checking if a colleague in Johannesburg is still at their desk.
• Planning UK-South Africa travel and arrival time comparisons.
• Remote teams coordinating daily standups across the UK and South Africa.
• Finding overlapping business hours for London-Johannesburg meetings.
• Verifying whether London is currently on GMT or BST.
• Investors monitoring London and Johannesburg stock exchange hours.
• Students and teachers arranging online lessons between the UK and South Africa.

Frequently Asked Questions