Time Zone Converter & Difference

Time Zone Converter & Difference

Local Processing

Convert between time zones, UTC and local time, and see the difference between zones.

How It Works & Processing Standards

Convert between time zones, UTC and local time, and see the difference between zones.

Tool processing runs in your browser. If you create a calculator or conversion share link, its values are included in the URL. See the privacy policy for account, analytics and advertising data.

Current Limits

  • Maximum input length: 100,000 characters

Choose zone conversion, UTC ↔ local or time difference under "Task". Rules come from the IANA data built into your browser, so days when daylight saving starts or ends are handled correctly.

What You Can Do

Zone conversion
What time a moment in one zone is in another.
UTC ↔ local
Converts a UTC time to this browser’s time zone.
Time difference
Both UTC offsets and the gap between them.

How to Use Time Zone Converter & Difference

  1. 1
    Choose a taskConversion, UTC ↔ local or difference.
  2. 2
    Enter a timeAs YYYY-MM-DDTHH:MM:SS.
  3. 3
    Choose zonesPick source and target zones.

Examples

9 a.m. in Seoul is what time in New York?
Input: 2026-09-27T09:00:00, Asia/Seoul → America/New_York
Result: 2026-09-26T20:00:00 (8 p.m. the previous day)
Seoul–Paris difference in winter
Input: 2026-01-15, Asia/Seoul ↔ Europe/Paris
Result: +09:00 / +01:00, difference -08:00

Common Use Cases

  • Scheduling meetings with overseas teams
  • Converting an overseas launch or live-stream time to your own

Frequently Asked Questions (FAQ)

The difference between two cities changes by season.

That is daylight saving. Paris is +02:00 in summer, 7 hours behind Seoul, and +01:00 in winter, 8 hours behind. Change the date to check.

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