Convert time between any two time zones using UTC offsets. Enter a time and source/target UTC offsets to see the equivalent time instantly.
The Time Zone Converter helps you translate any time from one UTC offset to another. Whether you're scheduling international meetings, coordinating with remote teams, or planning calls across continents, this tool gives you the exact equivalent time in the target time zone.
The world is divided into time zones, each defined by its offset from Coordinated Universal Time (UTC). For example, New York is UTC−5, London is UTC+0, Tokyo is UTC+9, and Sydney is UTC+11. Converting between these zones requires adding or subtracting the difference in offsets.
This calculator makes the conversion effortless. Enter your source time and both UTC offsets, and it instantly computes the target time, correctly handling day transitions when the converted time crosses midnight. It's an essential tool for anyone working in a global environment.
Precise measurement of this value supports better personal and professional planning, helping you make informed decisions about how to prioritize tasks and manage competing demands.
Global work requires constant time zone conversions. This tool takes the confusion out of offset arithmetic, handles day-boundary crossings, and gives you instant results. It's faster and more reliable than mental math, especially for unusual offset values like UTC+5:30 or UTC+9:45. Regular monitoring of this value helps individuals and teams detect productivity patterns and adjust workflows before small inefficiencies become entrenched and hard to correct.
Target Time = Source Time + (Target Offset − Source Offset) If the result exceeds 23:59, subtract 24 hours (next day). If the result is negative, add 24 hours (previous day). Example: 10:00 at UTC−5 to UTC+9: 10:00 + (9 − (−5)) = 10:00 + 14 = 24:00 = 00:00 next day.
Result: 00:00 (next day)
Converting 10:00 from UTC−5 (e.g., New York EST) to UTC+9 (e.g., Tokyo JST): the difference is 9 − (−5) = 14 hours. Adding 14 hours to 10:00 gives 24:00, which is 00:00 the next day. So when it's 10 AM in New York, it's midnight in Tokyo (the following day).
UTC (Coordinated Universal Time) is the global time standard. All time zones are defined as offsets from UTC. The Prime Meridian (0° longitude) roughly corresponds to UTC+0. Moving east increases the offset; moving west decreases it.
North America: PST (UTC−8), MST (UTC−7), CST (UTC−6), EST (UTC−5). Europe: GMT/WET (UTC+0), CET (UTC+1), EET (UTC+2). Asia: IST (UTC+5:30), CST (UTC+8), JST (UTC+9), AEST (UTC+10). These offsets shift during daylight saving time.
When scheduling across multiple time zones, find the overlapping business hours. For US East Coast to Central Europe, the overlap is roughly 9 AM–12 PM EST (3 PM–6 PM CET). For US West Coast to Asia, the overlap is very narrow, often requiring early morning or late evening calls.
A UTC offset is the number of hours (and sometimes half-hours) that a time zone is ahead of (+) or behind (−) Coordinated Universal Time. For example, UTC+3 means the local time is 3 hours ahead of UTC. Most offsets range from −12 to +14.
During standard time, New York (EST, UTC−5) is 5 hours behind London (GMT, UTC+0). During daylight saving, the difference may be 4 or 5 hours depending on when each region changes clocks.
Enter the offset as a decimal. India Standard Time (UTC+5:30) would be entered as 5.5. Nepal Time (UTC+5:45) would be 5.75. The calculator handles these fractional offsets correctly.
The calculator shows whether the result falls on the next day or previous day. If adding the offset produces a time over 24:00, it wraps around to the next day. If it produces a negative time, it wraps to the previous day.
This calculator uses fixed UTC offsets. During DST, many regions shift their offset by one hour. You need to use the DST-adjusted offset for accurate results during those periods.
The maximum difference between two time zones is 26 hours (from UTC−12 to UTC+14). The Line Islands in Kiribati use UTC+14, the farthest ahead of UTC of any time zone in regular use.