Time Difference Calculator
Compare the time in several cities at once, see how many hours ahead or behind each one is, convert a time between them and find the hours that suit everyone.
Loading the clocks…
How to compare times between places
- Add places. Type a city, address or time zone name; four common cities are there to start.
- Read the difference. Each row shows its time now and how far ahead or behind the first place it is.
- Change the reference. Press 'Make reference' to compare everything with another place.
- Convert a time. Pick a date and a time in the reference place to see it everywhere else.
- Plan a meeting. The 24-hour grid shows working hours in green and marks the hours that suit everyone.
When time differences matter
Scheduling calls
Find an hour that is daytime for everyone.
Remote teams
See colleagues' working hours side by side.
Calling family abroad
Avoid waking anyone.
Travel and jet lag
Know the difference before you fly.
Live events
When a launch or match happens in your time.
Trading hours
Market opening times in your zone.
Daylight saving changes
Differences shift for a few weeks each spring and autumn when countries change on different dates.
Freelancing
Agree deadlines in the client's time.
Where the times come from
Offsets and daylight saving rules come from the IANA time zone database built into your browser, through the standard Intl.DateTimeFormat interface. Differences are worked out for the date you pick, so they stay right across daylight saving changes.
Cities and addresses are matched to their time zone with the Photon geocoder (OpenStreetMap) and Open-Meteo's time zone lookup; you can also type an IANA zone name such as Europe/Berlin.
Frequently asked questions
Why does the difference change during the year?
Places change their clocks for daylight saving on different dates or not at all. For example, the US and Europe change on different Sundays, so for a few weeks the gap is an hour smaller.
Why is India 30 minutes off?
India uses UTC+05:30. Nepal uses +05:45 and parts of Australia +09:30; the tool shows the exact minutes.
Can I compare more than two places?
Yes, up to eight.
What is UTC?
Coordinated Universal Time, the reference all time zones are measured from.
Does it work offline?
Times for the places already added keep updating; adding a city needs the internet.
Related tools
Time Zone Finder
Type any address or use your location and get its IANA time zone, current local time, UTC offset, whether daylight saving time is in effect, and the date of the next clock change.
Time zone from Open-Meteo; rules from the IANA tz database in your browser
US Time Zone Map
A map of US time zones with the current time in each, their abbreviations and UTC offsets, and which areas skip daylight saving time — hover any area for its local clock.
timezone-boundary-builder (OpenStreetMap); IANA tz database
World Time Zone Map
A live map of every time zone in the world coloured by its current UTC offset, with each zone's local time on hover and the time now at every offset.
timezone-boundary-builder (OpenStreetMap); IANA tz database
Convert Time Zones
Pick a time in one city and see the same moment in another city, with daylight saving and the date change handled.
IANA tz database in your browser; Open-Meteo time zone lookup
Sun Position Calculator
Pick a place, date and time and get the sun's elevation and compass direction, plus sunrise, sunset, solar noon and day length in local time, with a chart of the sun's path that day.
NOAA solar calculator equations (Meeus, Astronomical Algorithms)
Sunrise Sunset Calculator
Get sunrise, sunset, dawn, dusk, solar noon and day length for every day of any month at any place, in its local time with daylight saving, and download the table.
NOAA solar calculation equations; IANA tz database