| 美國插座（A 型 / B 型）與 120V 60Hz 電壓完整指南 | 2026/2027 USD ($) |
|---|---|
| Guide | 美國插座（A 型 / B 型）與 120V 60Hz 電壓完整指南 |
| Overview | 台灣旅客免轉接頭直插須知、中港澳歐旅客必備美規兩扁腳轉接頭，以及 220V 吹風機在 120V 電網下的注意事項。 |
| Calculator | US Budget Calculator ($) · Sales Tax & Tipping ($) |
Type A & Type B Outlets (120V / 60Hz)
The United States uses NEMA 1-15 (Type A, two flat parallel blades) and NEMA 5-15 (Type B, two flat blades plus a U-shaped grounding pin) running at 120 Volts and 60 Hz. Travelers from Japan, Taiwan, and Canada use the exact same plug shape; travelers from Europe, the UK, Australia, and Korea need a simple plug adapter.
Dual-Voltage Chargers (100–240V) vs. Single-Voltage Hair Tools
Check the fine print on your charger brick: almost all phone, tablet, camera, and laptop chargers read 'INPUT: 100–240V ~ 50/60Hz' and work natively on U.S. 120V power with only a passive plug adapter. However, single-voltage 220V–240V hair dryers, curling irons, and straighteners from Europe/Asia will run at half heat or fail to turn on at 120V—use the free hair dryer provided in virtually every U.S. hotel room.
Key Takeaways & US Travel Tips
- Verify current entry rules on official U.S. government portals (esta.cbp.dhs.gov, nps.gov, recreation.gov).
- Use our interactive US Sales Tax & Tipping Calculator ($), National Parks Pass Calculator ($80), and Amtrak Rail Calculator.
- Save offline maps and our printable American English & Dietary Allergy Show-Cards before departure.
Frequently asked questions
美國插座（A 型 / B 型）與 120V 60Hz 電壓完整指南 (2026/2027)?
台灣旅客免轉接頭直插須知、中港澳歐旅客必備美規兩扁腳轉接頭，以及 220V 吹風機在 120V 電網下的注意事項。
USD ($) Sales Tax & Tipping?
Prices in the United States exclude state sales tax (0%–10.25%) and 18%–22% sit-down restaurant tipping.
Which US calculators help with 美國插座（A 型 / B 型）與 120V 60Hz 電壓完整指南?
Does this guide cover all 50 US states?
Yes—all 50 US states, Washington, D.C., and 10,714 cities are covered.
Official sources & further reading
Rules, prices and schedules change. Confirm details here before you travel: