SGT to Tehran Time Converter
IRST is 4 hours 30 minutes behind SGT. 9:00 AM SGT = 4:30 AM IRST.
IRST is 4 hours 30 minutes behind SGT. To convert SGT to Tehran Time, subtract 4 hours 30 minutes from the SGT time: 9:00 AM SGT = 4:30 AM IRST.
SGT (Singapore Time) is used in Singapore. Tehran Time (Tehran time) is used in Tehran, Iran.
SGT to Tehran Time time conversion table
SGT to Tehran Time on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| SGT | Tehran Time | Day |
|---|---|---|
| 12:00 AM SGT | 7:30 PM IRST | previous day |
| 1:00 AM SGT | 8:30 PM IRST | previous day |
| 2:00 AM SGT | 9:30 PM IRST | previous day |
| 3:00 AM SGT | 10:30 PM IRST | previous day |
| 4:00 AM SGT | 11:30 PM IRST | previous day |
| 5:00 AM SGT | 12:30 AM IRST | night |
| 6:00 AM SGT | 1:30 AM IRST | night |
| 7:00 AM SGT | 2:30 AM IRST | night |
| 8:00 AM SGT | 3:30 AM IRST | night |
| 9:00 AM SGT | 4:30 AM IRST | night |
| 10:00 AM SGT | 5:30 AM IRST | night |
| 11:00 AM SGT | 6:30 AM IRST | — |
| 12:00 PM SGT | 7:30 AM IRST | — |
| 1:00 PM SGT | 8:30 AM IRST | — |
| 2:00 PM SGT | 9:30 AM IRST | work hours |
| 3:00 PM SGT | 10:30 AM IRST | work hours |
| 4:00 PM SGT | 11:30 AM IRST | work hours |
| 5:00 PM SGT | 12:30 PM IRST | — |
| 6:00 PM SGT | 1:30 PM IRST | — |
| 7:00 PM SGT | 2:30 PM IRST | — |
| 8:00 PM SGT | 3:30 PM IRST | — |
| 9:00 PM SGT | 4:30 PM IRST | — |
| 10:00 PM SGT | 5:30 PM IRST | — |
| 11:00 PM SGT | 6:30 PM IRST | — |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert SGT to Tehran Time
Subtract 4 hours 30 minutes from the SGT time to get Tehran Time.
Example: 9:00 AM SGT = 4:30 AM IRST.
Across midnight: 1:00 AM SGT = 8:30 PM IRST (previous day). The date changes, so always check the day as well as the hour.
Time difference between SGT and Tehran Time
The time difference between SGT and Tehran Time is 4 hours 30 minutes all year – IRST is behind SGT.
SGT and Tehran Time during daylight saving time
- SGT does not observe daylight saving time; it stays on UTC+8 all year.
- Tehran Time does not observe daylight saving time; it stays on UTC+3:30 all year.
Best time for a meeting between SGT and Tehran Time
SGT and Tehran Time share 3 hours 30 minutes of the 9 AM–5 PM working day. Any time between 1:30 PM and 5:00 PM SGT lands between 9:00 AM and 12:30 PM IRST, inside working hours for both.
SGT to Tehran Time FAQ
What is the time difference between SGT and Tehran Time?
IRST is 4 hours 30 minutes behind SGT all year. 9:00 AM SGT = 4:30 AM IRST.
What is 9 AM SGT in Tehran Time?
9:00 AM SGT is 4:30 AM IRST.
What is 12 PM (noon) SGT in Tehran Time?
12:00 PM SGT is 7:30 AM IRST.
Is Tehran Time ahead of or behind SGT?
IRST is 4 hours 30 minutes behind SGT, so it is earlier in Tehran Time than in SGT.
Does SGT change for daylight saving time?
No. SGT stays on the same offset all year, so conversions never shift for daylight saving time.
Does Tehran Time change for daylight saving time?
No. Tehran Time stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between SGT and Tehran Time?
SGT and Tehran Time share 3 hours 30 minutes of the 9 AM–5 PM working day. Any time between 1:30 PM and 5:00 PM SGT lands between 9:00 AM and 12:30 PM IRST, inside working hours for both.
Related conversions
Convert Tehran Time to SGT
Convert SGT to other time zones
Convert other time zones to Tehran Time
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.