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World clock · 12 zones · DST-aware

Time Zone Converter

Convert a time across the world's major time zones at once — for meetings, calls, and coordinating with remote teams.

To convert time zones, add or subtract the difference in UTC offsets. For example, IST (UTC+5:30) is 13.5 hours ahead of PST (UTC−8). Select your zones above to convert instantly across 50+ regions.

Time Zone Converter
Converted time
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Source—
Target—
Time difference—
Target date—
All world zones at a glance
Same source time, every major zone

About time zones

The world has 24 standard time zones, plus a handful of half-hour and quarter-hour offsets (India at +5:30, Nepal at +5:45, parts of Australia at +9:30, etc.). Most zones are defined relative to UTC (Coordinated Universal Time), which replaced GMT as the international time standard in 1972.

Common zone abbreviations

AbbreviationNameUTC OffsetUsed in
PST/PDTPacific (Daylight)−8 / −7California, Washington, Oregon, BC
EST/EDTEastern (Daylight)−5 / −4New York, Florida, Toronto
GMT/BSTGreenwich / British Summer0 / +1UK, Portugal, Iceland
CET/CESTCentral European (Summer)+1 / +2France, Germany, Italy, Spain
ISTIndia Standard Time+5:30All of India (no DST)
JSTJapan Standard Time+9Japan (no DST)
AEST/AEDTAustralian Eastern+10 / +11Sydney, Melbourne, Brisbane (no DST)

Tips for scheduling across zones

Questions, answered

Things people actually ask.

Enter a time and pick your source zone. The calculator shows the equivalent time in 12 common zones instantly. For meeting planning across teams, you can see all participants' local times at a glance.
Yes. The calculator uses each zone's current UTC offset, which already accounts for DST where applicable (US, EU, Australia). Some zones don't observe DST (India, Japan, China, most of Asia and Africa).
IST (Indian Standard Time) is UTC+5:30. PST (Pacific Standard Time) is UTC−8 in winter, PDT is UTC−7 in summer. So IST is 12.5 to 13.5 hours ahead of California depending on the time of year.
Almost always due to Daylight Saving Time. The US shifts on the second Sunday of March (spring forward) and the first Sunday of November (fall back). Europe shifts a few weeks later. The calculator uses live UTC offsets to avoid this.
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Sources & standards

Where these answers come from

The figures, rules, and standards on this page are based on the official sources below. This information is provided for general reference only and is not legal, financial, or medical advice.