Guam: plugs, voltage, currency, time & travel facts

Plugs and voltage

Guam uses Types A and B sockets. Mains supply is 110 V at 60 Hz.

At 110 V, devices from 220–240 V countries that are not dual-voltage will run weakly or not at all. Chargers labelled “100–240V” work fine with just a plug adapter.

Money

$ US Dollar USD

Reference rates, 2026-10-30 (ECB)
1 EUR	1.12 USD
1 GBP	1.34 USD
1 JPY	0.006359 USD
1 AUD	0.7025 USD

US Dollar: where it's used and rates

Price level 111 (US = 100, 2021)

Everyday household prices in Guam are about 111% of US prices when converted at market exchange rates: dearer than the median country (50). All countries

Language

Chamorroofficial22%
Englishde facto official91%

Bars show the share of the population that speaks each language (CLDR estimates).

Time

UTC+10

Guam is on UTC+10, with no daylight saving time.

Driving

Traffic in Guam drives on the right, so the steering wheel is on the left.

Public holidays in the next 12 months

17 national public holidays from 2 November 2026. Banks, offices and many shops close; regional holidays are not shown. Dates marked “estimated” follow a lunar calendar and can move by a day.