Time Zone Converter
Convert a time from one time zone to another instantly — pick your zones below and see the result right away, no page reload.
How time zone conversion works
Every time zone is defined as an offset from UTC (Coordinated Universal Time) — for example, New York is UTC-5 (or UTC-4 during daylight saving), and Tokyo is UTC+9. To convert a time from one zone to another, you find the difference between the two offsets and add or subtract it from the original time. This calculator does that automatically and accounts for common daylight saving rules.
Common time zone conversions
| City | UTC Offset |
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Why this conversion gets searched so often
Remote work, international teams, and cross-border friendships and family ties mean that scheduling a call or meeting across time zones has become a daily task for millions of people. A meeting that looks perfectly reasonable at 9 AM in London might land at 1 AM in Los Angeles or 6 PM in Tokyo — getting it wrong means someone either misses the call entirely or has to join in the middle of the night.
Tips for scheduling across time zones
When planning a meeting with people in multiple regions, it helps to pick a time that falls within reasonable working hours (roughly 8 AM–6 PM) in as many zones as possible, even if that means someone has to join slightly early or late. Daylight saving time changes twice a year in many countries but not all, which can shift the gap between two zones by an hour for part of the year — always double check around March and November, when the US, Europe and other regions switch on different dates. Writing meeting times with both the time and the zone abbreviation (e.g. "3 PM EST / 8 PM GMT") avoids confusion entirely.
Where this conversion matters in real life
Remote teams spread across countries rely on time zone conversion daily to schedule stand-ups, calls, and deadlines fairly across the group. International flights list departure and arrival times in local time, so travelers need to convert to figure out how long a journey actually takes or when to expect a connecting flight. Online events, livestreams, and product launches are often announced in one time zone (commonly UTC or US Eastern/Pacific) and viewers worldwide need to convert that to their own local time to avoid missing it.
Frequently asked questions
What is UTC and why is it used as a reference?
UTC (Coordinated Universal Time) is the global time standard that all time zones are measured against, expressed as an offset like UTC+1 or UTC-5. It doesn't change for daylight saving, which makes it a stable reference point for calculating the difference between any two zones.
Does this calculator account for daylight saving time?
Yes, the calculator uses each zone's current standard or daylight saving offset depending on the time of year, so the result reflects what clocks actually show in that region right now.
Why do some countries not observe daylight saving time?
Daylight saving was introduced to make better use of daylight in summer, but many countries near the equator see little seasonal change in daylight hours, so they never adopted it. Others, like most of the US and EU, still use it but on different start and end dates, which can temporarily shift the gap between zones.
How do I convert a time back the other way?
Use the swap button above the calculator to flip the "from" and "to" zones instantly, or simply select the reverse combination in the two dropdown menus.
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