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Global ClockTime zone converter & meeting planner
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Working hours
Start
09
End
18
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AUTO follows the operating system. Working hours drive the green banding on every grid. All four persist on this device only.

Time in Singapore vs Tehran

Singapore keeps UTC+8 (UTC+8) and Tehran keeps UTC+3:30 (UTC+3:30) today. Tehran is 4½ hours behind Singapore; the rows below read both clocks live.

The working day, side by side

Hours shaded in both rows are inside working hours in both cities: 09:00–14:00 in Tehran (13:00–18:00 your time).

Singapore and Tehran hour by hour, with the working-hour overlap shaded
City00:00 in Singapore01:00 in Singapore02:00 in Singapore03:00 in Singapore04:00 in Singapore05:00 in Singapore06:00 in Singapore07:00 in Singapore08:00 in Singapore09:00 in Singapore10:00 in Singapore11:00 in Singapore12:00 in Singapore13:00 in Singapore14:00 in Singapore15:00 in Singapore16:00 in Singapore17:00 in Singapore18:00 in Singapore19:00 in Singapore20:00 in Singapore21:00 in Singapore22:00 in Singapore23:00 in Singapore
Singapore——000102030405060708091011121314151617181920212223
Tehran——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Singapore and Tehran

Open in the PlannerAdd more cities, find a meeting time that works for everyone, then share it as a link.Open in Watch ViewKeep Singapore, Tehran and other cities on screen as live clocks, under an animated sky and sun.

Best hours to call

13:00 in Singapore
Inside working hours on both sides
09:00 in Tehran
14:00 in Singapore
Inside working hours on both sides
10:00 in Tehran
15:00 in Singapore
Inside working hours on both sides
11:00 in Tehran
16:00 in Singapore
Inside working hours on both sides
12:00 in Tehran

Where daylight saving pulls them apart

Neither Singapore nor Tehran changes its clocks, so the gap above holds all year.

Also useful

Common questions

How many hours ahead is Tehran of Singapore?

Tehran is 4½ hours behind Singapore right now. The gap is not fixed: it moves whenever either side changes its clocks.

What is the best time to call between Singapore and Tehran?

Any hour in 13:00–18:00 Singapore time is inside working hours in both cities.

Do Singapore and Tehran change clocks on the same date?

Neither city changes its clocks, so the gap between them never moves.