Time Difference Calculator
Choose two cities to see the time difference between them right now.
Quick answer: New York is 5 hours behind London for most of the year. The gap can change by an hour for a few weeks each spring and autumn, when the US and Europe change their clocks on different dates.
How to use it
- Pick the two cities.
- The difference appears in large type, with the current time in both places.
- Press Swap to flip the cities.
Why the difference can change
Countries change their clocks on different dates. The United States moves to daylight saving time on the second Sunday in March, while Europe moves on the last Sunday in March. For a few weeks the time difference between the two is one hour smaller than usual. The calculator uses today's real rules.
What people use it for
- Planning calls with family or colleagues
- Choosing meeting times
- Travel and jet lag planning
- Following events abroad
- Customer support hours
Questions
How do I work out the time difference?
Subtract the UTC offsets of the two places. This tool does that for today's date.
Does daylight saving time change the result?
Yes. This tool uses the time zone rules in your browser, so it uses summer or winter time correctly for the date you choose.
Is anything saved or sent?
No. Times are worked out in your browser.
Is it free?
Yes. No sign-up, no install and no limit.
Is anything saved or sent?
No. Everything runs in your browser. Only your own best score, where a page shows one, is kept on your device.
Last updated 2026-10-24. Free to use, no sign-up. Made by ficklestudio26.