Turn a China Standard Time reading into Coordinated Universal Time. The panels show both clocks live, and the roller lets you line up any CST time against its UTC equivalent.
China Standard Time
Coordinated Universal Time
US Eastern Time
THE CLOCKS ABOVE ALWAYS SHOW THE LIVE CURRENT TIME. THE ROLLER BELOW IS A LOOKUP TOOL — ROTATING IT NEVER CHANGES THEM.
CST is 8 hours ahead of UTC
ET is 4 hours behind UTC
China is 12 hours ahead of United States (Eastern)
| CST | UTC | Date |
|---|---|---|
| 08:00 | 00:00 | Same day |
| 09:00 | 01:00 | Same day |
| 10:00 | 02:00 | Same day |
| 11:00 | 03:00 | Same day |
| 12:00 | 04:00 | Same day |
| 13:00 | 05:00 | Same day |
| 14:00 | 06:00 | Same day |
| 15:00 | 07:00 | Same day |
| 16:00 | 08:00 | Same day |
| 17:00 | 09:00 | Same day |
| 18:00 | 10:00 | Same day |
| 19:00 | 11:00 | Same day |
| 20:00 | 12:00 | Same day |
| 21:00 | 13:00 | Same day |
| 22:00 | 14:00 | Same day |
| 23:00 | 15:00 | Same day |
| 00:00 | 16:00 | Previous day in UTC |
| 01:00 | 17:00 | Previous day in UTC |
| 02:00 | 18:00 | Previous day in UTC |
| 03:00 | 19:00 | Previous day in UTC |
| 04:00 | 20:00 | Previous day in UTC |
| 05:00 | 21:00 | Previous day in UTC |
| 06:00 | 22:00 | Previous day in UTC |
| 07:00 | 23:00 | Previous day in UTC |
China Standard Time is the local clock in China. Converting it to UTC removes the local offset so the time can be shared with anyone in the world without ambiguity — which is exactly why UTC is used for servers, aviation and international scheduling.
The whole of China uses a single time zone, China Standard Time, based on the 120° E meridian.
Subtract the current offset shown in the offset panel from the local CST time. If the result goes below 00:00, UTC is still on the previous date. Use the roller to read the pairing directly instead of doing the arithmetic.
CST has no daylight saving changes, so the offset to UTC is stable all year. It is still calculated live from the Asia/Shanghai IANA database rather than hard-coded.
Early-morning or late-night local times frequently sit on a different UTC date. The converter labels every selection as SAME DAY, NEXT DAY or PREVIOUS DAY so a deadline written in UTC is never off by 24 hours.
China has not observed daylight saving time since 1991, so CST stays at UTC +08:00 all year.