Time in Tehran vs Singapore

Tehran keeps UTC+3:30 (UTC+3:30) and Singapore keeps UTC+8 (UTC+8) today. Singapore is 4½ hours ahead of Tehran; 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: 14:00–18:00 in Singapore (09:00–13:00 your time).

Tehran and Singapore hour by hour, with the working-hour overlap shaded
City	00:00 in Tehran	01:00 in Tehran	02:00 in Tehran	03:00 in Tehran	04:00 in Tehran	05:00 in Tehran	06:00 in Tehran	07:00 in Tehran	08:00 in Tehran	09:00 in Tehran	10:00 in Tehran	11:00 in Tehran	12:00 in Tehran	13:00 in Tehran	14:00 in Tehran	15:00 in Tehran	16:00 in Tehran	17:00 in Tehran	18:00 in Tehran	19:00 in Tehran	20:00 in Tehran	21:00 in Tehran	22:00 in Tehran	23:00 in Tehran
Tehran——	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Singapore——	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23

Working hours
Shoulder
Night
Overlap

Do more with Tehran and Singapore

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

Best hours to call

09:00 in Tehran

Inside working hours on both sides

14:00 in Singapore

10:00 in Tehran

Inside working hours on both sides

15:00 in Singapore

11:00 in Tehran

Inside working hours on both sides

16:00 in Singapore

12:00 in Tehran

Inside working hours on both sides

17:00 in Singapore

Where daylight saving pulls them apart

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

Also useful

Common questions

How many hours ahead is Singapore of Tehran?

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

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

Any hour in 09:00–13:00 Tehran time is inside working hours in both cities.

Do Tehran and Singapore change clocks on the same date?

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