Do you actually need an adapter for San Francisco?
One paragraph, no detour. Read this and you have 80% of what you need.
“San Francisco uses Type A (two flat pins) and Type B (two flat plus ground) outlets with 120V at 60Hz. If you are arriving from Europe, the UK, Asia, or Australia, you will need a travel adapter to convert your plug shape. Your dual-voltage chargers (100-240V) work safely at US voltage. US and Canadian travelers do not need any adapter.”
What you'll actually find behind the bedside table.
How outlets vary across San Francisco's hotel categories — luxury, mid-range, hostels, and Airbnbs.
San Francisco hotels universally have Type A/B outlets. Hotels in Union Square, Nob Hill, and SoMa (like the Fairmont, St. Regis, and Four Seasons Embarcadero) provide standard US outlets with USB ports increasingly common. Many hotels now have USB-A and USB-C ports built into the nightstand. Budget hotels in the Tenderloin and hostels in Fisherman's Wharf area have basic outlets.
Where to buy an adapter on arrival.
Specific stores, transit landmarks, and price ranges in San Francisco — not generic "ask your hotel" advice.
Best Buy, Target, and Walgreens in the Union Square area sell travel adapters for $5-$15. The airport (SFO) has InMotion electronics stores in all terminals with universal adapters. CVS and Walgreens in tourist areas (Fisherman's Wharf, Market Street) stock adapters near the travel section. Amazon same-day delivery is available throughout San Francisco.
Why the wall matters more than the plug.
The plug shape decides whether it fits. The voltage decides whether it survives. Two different problems.
Low-voltage region (US standard). Travelers from Europe, Asia, and Australia: dual-voltage devices are safe with an adapter. Single-voltage 220V appliances need a step-up converter.
Same frequency as the Americas. Most modern devices tolerate both 50Hz and 60Hz; clock radios and some motorized devices may run differently.
Adapter ≠ converter.
A plug adapter only changes the shape of the prongs. It does not change the voltage. Always check the label on your device or charger for “INPUT: 100–240V” before plugging in.
What works in San Francisco (and what doesn't).
Notes from the road. Local-only quirks our country guides don't catch.
- 01BART trains and Muni buses do not have passenger charging ports
- 02Many Starbucks and Peet's Coffee locations have outlets and wireless Qi charging pads built into tables
- 03San Francisco Public Library branches offer free WiFi and outlets for charging
- 04SFO Airport has charging stations throughout all terminals, including wireless charging pads
- 05Bring a USB-C cable if your phone uses it since many newer hotel USB ports are USB-C
The kit for San Francisco.
A universal adapter handles San Francisco's Type A/B outlets and almost everywhere else you might fly next.
Universal travel adapters
Type A, C, G, and I in a single device — covers United States and almost every country we list.
Browse on Amazon ↗Tech essentialsUSB-C chargers & cables
65W and 100W GaN bricks for laptops, tablets, and phones. The brick handles voltage. The adapter handles plug shape.
Browse on Amazon ↗Every adapter, charger, and travel essential we've recommended.
The other half of getting there.
Power is solved. These four cover the rest — connectivity, transfers, insurance.
Mobile data the moment you land.
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Activate Saily ↗NordVPNHotel WiFi, encrypted.
Café and hotel WiFi in San Francisco is rarely encrypted. NordVPN locks down banking, email, and work logins.
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Book a ride ↗Ekta TravelInsurance from $0.99/day.
Medical and trip cancellation cover for the destinations our city guides target. Quick online quote.
Quote Ekta ↗Questions readers actually ask us.
Real questions from inbox replies — answered without hand-waving.
Do European plugs work in San Francisco?Open
No. European round-pin plugs do not fit into US flat-pin outlets. You need a Europe-to-US plug adapter. Your European chargers (labeled 100-240V) will work safely on US 120V once plugged in with the right adapter.
Is US voltage lower than Europe? Will my devices charge slower?Open
The US uses 120V compared to Europe's 230V, but dual-voltage chargers compensate automatically. Your phone or laptop will charge at the same speed. The charger adjusts its internal current draw to deliver the same wattage regardless of input voltage.
Do I need any adapter if I am from Canada?Open
No. Canada and the US use identical plug types (A and B) and the same voltage (120V) and frequency (60Hz). Your Canadian devices work in San Francisco without any adapter.
Heading somewhere other than San Francisco?
Last verified: May 2026