Timezone Converter

Convert times between any world timezones instantly. Supports all IANA timezones with daylight saving adjustments.

Timezone Converter tool

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Example

Input: 9:00 AM in New York (America/New_York) on 2026-01-15, converted to London (Europe/London)

Result: 02:00 PM in London (source UTC-05:00, target UTC+00:00, time difference +5 hours)

In January New York is on EST (UTC-5) and London on GMT (UTC+0), so 9:00 AM + 5 hours = 2:00 PM.

UTC Offsets in Winter and Summer

CityJanuary 2026July 2026
Los AngelesUTC-08:00UTC-07:00
PhoenixUTC-07:00UTC-07:00
ChicagoUTC-06:00UTC-05:00
New YorkUTC-05:00UTC-04:00
LondonUTC+00:00UTC+01:00
ParisUTC+01:00UTC+02:00
DubaiUTC+04:00UTC+04:00
Mumbai / KolkataUTC+05:30UTC+05:30
KathmanduUTC+05:45UTC+05:45
ShanghaiUTC+08:00UTC+08:00
TokyoUTC+09:00UTC+09:00
SydneyUTC+11:00UTC+10:00

Offsets on January 15 and July 15, 2026, from the IANA time zone database. DST rules can change.

  1. Select the source timezone from the From Timezone dropdown, which lists major cities by name (e.g., "New York") followed by other IANA identifiers (e.g., "Pacific/Chatham").
  2. Enter the date and time you want to convert in the source time input field.
  3. Select the target timezone from the To Timezone dropdown by choosing the destination city or timezone.
  4. View the converted time displayed immediately, with the correct UTC offset and any DST adjustment applied for the chosen date.
  5. Verify the UTC offsets shown for both timezones and copy the converted time for scheduling or communication.

Converting Time Between Time Zones

A time zone converter tells you what a clock reads in one place when it shows a given time in another. At 9:00 AM in New York on January 15, it is 2:00 PM in London. In winter, New York is on UTC-5 and London is on UTC+0.

Each zone is set as an offset from UTC, the world reference time. The tricky part is daylight saving time (DST), when many places move their clocks forward an hour in summer. The US and Europe do not switch on the same weekend. So for a few weeks each spring and fall, the New York to London gap is 4 hours instead of the usual 5.

That is why this tool asks for a date as well as a time. It looks up the rules for that exact day in the IANA time zone database, the same data your phone and computer use. Then it shows the result with both UTC offsets and the time difference in hours. You can pick from a list of major cities, plus every other IANA zone your browser knows.

Some zones are not whole hours from UTC. India is UTC+5:30 and Nepal is UTC+5:45, so a difference like +10.5 hours is normal. The converted date can also be the day before or after the one you entered. To see several cities at once, open the World Clock. To find a slot that suits a whole team, use the Time Zone Meeting Planner.

Sources

Frequently Asked Questions

Usually 5 hours, with London ahead. In winter New York is UTC-5 and London UTC+0. In summer they are UTC-4 and UTC+1, still 5 hours apart. For a few weeks in March and in October or November, the US and UK change clocks on different dates, and the gap drops to 4 hours.
Yes. It works out the offset in force at the exact date and time you enter, for both places. That is why the same pair of cities can show a different difference in January and in July. If you convert a time that falls inside a clock change, check the offsets shown.
For everyday scheduling they show the same time. UTC is the modern standard kept by atomic clocks. GMT is the older name for the time at Greenwich, London. The UK uses GMT in winter but British Summer Time (UTC+1) in summer, so "London time" is not always GMT.
Some countries chose a local time closer to their own solar noon than a whole-hour zone allowed. India uses UTC+5:30 across the whole country, and Nepal uses UTC+5:45. Parts of Australia and Newfoundland in Canada also use half-hour offsets. The converter handles all of these.

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