Time difference between Guam and Vietnam: 3 hours
Guam
UTC+10
--:--:--
Vietnam
UTC+7
--:--:--
Guam is 3 hours ahead of Vietnam
Best time for a call or meeting
Guam 12:00–18:00 = Vietnam 09:00–15:00
Both cities are within business hours (9:00–18:00).
Convert a specific time
→ Vietnam
Hour-by-hour conversion
| Guam | Vietnam |
|---|---|
| 00:00 | 21:00 |
| 01:00 | 22:00 |
| 02:00 | 23:00 |
| 03:00 | 00:00 |
| 04:00 | 01:00 |
| 05:00 | 02:00 |
| 06:00 | 03:00 |
| 07:00 | 04:00 |
| 08:00 | 05:00 |
| 09:00 | 06:00 |
| 10:00 | 07:00 |
| 11:00 | 08:00 |
| 12:00 | 09:00 |
| 13:00 | 10:00 |
| 14:00 | 11:00 |
| 15:00 | 12:00 |
| 16:00 | 13:00 |
| 17:00 | 14:00 |
| 18:00 | 15:00 |
| 19:00 | 16:00 |
| 20:00 | 17:00 |
| 21:00 | 18:00 |
| 22:00 | 19:00 |
| 23:00 | 20:00 |
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 Vietnam?
Guam is 3 hours ahead of Vietnam. When it is 12:00 noon in Guam, it is 09:00 in Vietnam.
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 12:00–18:00 = Vietnam 09:00–15:00. Both cities are within business hours (9:00–18:00).
Other countries & regions
Guam - JapanGuam - South KoreaGuam - ChinaGuam - TaiwanGuam - Hong KongGuam - SingaporeGuam - ThailandGuam - 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