Time Zone Converter: Convert Time Between UTC Offsets
Convert a clock time from one UTC offset to another, including half-hour zones, with the day change shown.
Inputs
- Day
- The previous day
- Working
- 09:00 UTC+5:30 is 03:30 UTC; −5 h for UTC−5 gives 22:30
- Time difference
- −10:30 h — the target zone is behind
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What each Time Zone input means
- Time in the first zone
- The clock time in the first zone. The time box follows your device's 12- or 24-hour format.
- From UTC offset
- The first zone's UTC offset on the day in question, with example places. In summer, pick the daylight-saving offset — US Eastern is UTC−4, not −5.
- To UTC offset
- The zone to convert to, chosen the same way.
Time Zone conversion formula
target time = source time − source UTC offset + target UTC offset (± 24 hours across midnight)
Every time zone is an offset from Coordinated Universal Time. To move a time between zones, take away the source offset to get UTC, then add the target offset; if the answer passes midnight, the date changes too, and the page says whether it lands on the previous, the same or the next day. Offsets are not always whole hours — India is UTC+5:30, Nepal UTC+5:45 and Newfoundland UTC−3:30 — and every offset in use is in the lists, from UTC−12 to UTC+14. Daylight saving is the catch: the US Eastern zone is UTC−5 in winter but UTC−4 from the second Sunday in March to the first Sunday in November, so choose the offset in force on the day you mean.
Time Zone conversion worked example
9:00 am in India (UTC+5:30) is 03:30 UTC, and 03:30 − 5 hours is 22:30 the previous evening in New York in winter (UTC−5). In summer, when New York is UTC−4, it is 23:30.
More Time Zone examples
A 14:00 UTC call in India: 5 hours 30 minutes ahead, so 19:30 the same day.
10 pm in New York in summer (UTC−4) is 02:00 UTC, which is 11:00 the next day in Tokyo (UTC+9), 13 hours ahead.
Noon UTC in Kathmandu, UTC+5:45: 17:45 the same day.
Where the Time Zone converter can give the wrong answer
- Daylight saving is not applied automatically; pick the offset for the date. The US, UK and EU change clocks on different weekends.
- Offsets east of UTC are positive, west negative. A meeting at 15:00 UTC is 11:00 in New York in summer.
- Countries occasionally change their offsets; for a city on a future date, check its current rules.
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Time Zone conversion reference table
| City | January | July |
|---|---|---|
| Los Angeles | UTC−8 | UTC−7 |
| New York | UTC−5 | UTC−4 |
| São Paulo | UTC−3 | UTC−3 |
| London | UTC+0 | UTC+1 |
| Paris, Berlin | UTC+1 | UTC+2 |
| Johannesburg | UTC+2 | UTC+2 |
| Dubai | UTC+4 | UTC+4 |
| Mumbai, Delhi | UTC+5:30 | UTC+5:30 |
| Singapore | UTC+8 | UTC+8 |
| Tokyo | UTC+9 | UTC+9 |
| Sydney | UTC+11 | UTC+10 |
| Auckland | UTC+13 | UTC+12 |
Time Zone conversion FAQ
- In winter (New York UTC−5), 9:00 am New York is 7:30 pm in India (UTC+5:30), 10.5 hours ahead. In summer, with New York on UTC−4, it is 6:30 pm, 9.5 hours ahead.
- Add your offset: UTC 14:00 is 09:00 in US Eastern winter time (UTC−5) and 15:00 in London summer time (UTC+1).
- On the second Sunday in March, and it ends on the first Sunday in November (15 U.S.C. 260a). Eastern time is UTC−4 in between and UTC−5 otherwise.
- The offset is set by each country. India uses UTC+5:30 nationwide, Newfoundland UTC−3:30 and Nepal UTC+5:45.
- Summer time runs from the last Sunday in March to the last Sunday in October, with the change at 01:00 UTC everywhere in the EU, under Directive 2000/84/EC. The UK uses the same dates. Because the US changes on different Sundays, New York and London are 4 hours apart instead of 5 for a few weeks each spring and about a week each autumn.
- For clock times, none: both are the time at 0° longitude. UTC is the atomic-clock standard the world sets its clocks by; GMT is also the name of the UK's winter time, which is UTC+0.
- Eastern Standard Time, UTC−5, is the US East Coast in winter; Eastern Daylight Time, UTC−4, applies from the second Sunday in March to the first Sunday in November.
- Convert everything to UTC first, then from UTC to each zone: a 15:00 UTC call is 11:00 in New York in summer, 16:00 in London and 20:30 in India.
- GMT, UTC+0, from the last Sunday in October to the last Sunday in March, and British Summer Time, UTC+1, for the rest of the year.