Time difference between Guam and South Korea: 1 hour
Guam
UTC+10
--:--:--
South Korea
UTC+9
--:--:--
Guam is 1 hour ahead of South Korea
Best time for a call or meeting
Guam 10:00–18:00 = South Korea 09:00–17:00
Both cities are within business hours (9:00–18:00).
Convert a specific time
→ South Korea
Hour-by-hour conversion
| Guam | South Korea |
|---|---|
| 00:00 | 23:00 |
| 01:00 | 00:00 |
| 02:00 | 01:00 |
| 03:00 | 02:00 |
| 04:00 | 03:00 |
| 05:00 | 04:00 |
| 06:00 | 05:00 |
| 07:00 | 06:00 |
| 08:00 | 07:00 |
| 09:00 | 08:00 |
| 10:00 | 09:00 |
| 11:00 | 10:00 |
| 12:00 | 11:00 |
| 13:00 | 12:00 |
| 14:00 | 13:00 |
| 15:00 | 14:00 |
| 16:00 | 15:00 |
| 17:00 | 16:00 |
| 18:00 | 17:00 |
| 19:00 | 18:00 |
| 20:00 | 19:00 |
| 21:00 | 20:00 |
| 22:00 | 21:00 |
| 23:00 | 22:00 |
Business hours 9–18 Waking hours 7–22 Night / early morning
Daylight saving time can change the difference by season. Shown values reflect the current offset.
Frequently asked questions
How many hours is the time difference between Guam and South Korea?
Guam is 1 hour ahead of South Korea. When it is 12:00 noon in Guam, it is 11:00 in South Korea.
Does daylight saving time affect the difference?
No. Neither place observes daylight saving time, so the difference stays the same all year.
What is the best time for a call or meeting?
Guam 10:00–18:00 = South Korea 09:00–17:00. Both cities are within business hours (9:00–18:00).
Other countries & regions
Guam - JapanGuam - ChinaGuam - TaiwanGuam - Hong KongGuam - SingaporeGuam - ThailandGuam - VietnamGuam - PhilippinesGuam - CambodiaGuam - MalaysiaGuam - IndonesiaGuam - BaliGuam - IndiaGuam - UAEGuam - Saudi ArabiaGuam - TurkeyGuam - HawaiiGuam - United KingdomGuam - FranceGuam - GermanyGuam - ItalyGuam - SpainGuam - PortugalGuam - NetherlandsGuam - SwitzerlandGuam - SwedenGuam - PolandGuam - GreeceGuam - FinlandGuam - RussiaGuam - EgyptGuam - South AfricaGuam - United StatesGuam - CanadaGuam - MexicoGuam - BrazilGuam - ArgentinaGuam - ChileGuam - PeruGuam - ColombiaGuam - AustraliaGuam - New Zealand