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About this tool
Mainland China runs 220 V at 50 Hz on type A, C and I sockets — check your plug, the 10/16 A limit and how Hong Kong differs.
This guide decides whether your device needs a plug adapter, a voltage converter, or nothing at all in mainland China. China supplies 220 V at 50 Hz and the IEC lists three plug types in use — type A (two flat pins), type C (Europlug) and the earthed GB 2099 type I — with the everyday wall outlet being a combination faceplate that takes both A and I. Enter your plug and the voltage range on the label to get the verdict, the current drawn, and a reminder that Hong Kong and Macau run British type G sockets instead.
Open Plug and Voltage Guide for China on AltFTool — it loads instantly in your browser.
Add your input to the workspace.
Adjust the options until the result looks right.
Copy or download the output and put it to work.
Applies the P = V squared over R rule to show what a resistive appliance delivers at 220 V instead of guessing.
Marks the Australian and Argentine variants that fit the socket but do not share Chinese wiring.
Reminds you that the SARs use type G, so one mainland adapter is not enough.
A type I adapter for mainland China — the flat angled-pin GB 2099 shape. Type A (two flat parallel pins) and type C (the two-pin round Europlug) also appear on the IEC's list for China, so US two-pin and European Europlug chargers often go straight into the combination wall socket. UK type G and Schuko type F plugs always need an adapter.
220 V at 50 Hz. Devices labelled 100-240V 50/60Hz — nearly every laptop, phone and camera charger — need only a shape adapter. A single-voltage 110 V or 120 V appliance from the US or Japan needs a step-down transformer, not an adapter.
Yes, and it does not need a transformer. 220 V is only about 4% below 230 V, well inside the swing both supplies see anyway. The one visible effect is on purely resistive appliances: since power falls with the square of the voltage, a 2,000 W kettle rated at 230 V delivers roughly 1,830 W on 220 V, so it simply takes a little longer to boil.
No. Hong Kong uses the British BS 1363 type G socket with fused plugs, and Macau is mostly type G with older round-pin fittings still in service. Both run 220 V at 50 Hz like the mainland, so the voltage is fine — but a type I adapter bought for Beijing will not fit a Hong Kong wall socket.