Free Time Zone Calculator - Global Time Made Easy
Convert times between time zones worldwide. Schedule international meetings, coordinate global teams, and understand UTC offsets.
Quick Answer
Major US offsets from UTC: EST/EDT = -5/-4, CST/CDT = -6/-5, PST/PDT = -8/-7. London (GMT/BST) = 0/+1.
Key Facts about Time Zone Calculator:
- UTC is the global standard
- EST = UTC-5, PST = UTC-8
- London GMT = UTC+0
- Daylight saving changes offset
- 24 primary time zones worldwide
Why Use Our Time Zone Calculator?
Complete time zone tools:
World Zones
All global time zones.
Conversion
Any zone to any zone.
DST Aware
Handles daylight saving.
Meeting Planner
Find overlap times.
Instant Results
Get conversions immediately.
100% Private
Your data stays private.
How to Time Zone Calculator in 3 Easy Steps
Convert time zones:
Enter Time
Time and source zone.
Select Target
Destination time zone.
Get Converted
See time in new zone.
Common Use Cases for Time Zone Calculator
Perfect for:
Frequently Asked Questions
Everything you need to know about our time zone calculator
How do I convert between time zones?
Add/subtract hour difference between zones
Add or subtract the hour difference. EST to PST: subtract 3 hours (9 AM EST = 6 AM PST). EST to London: add 5 hours (9 AM EST = 2 PM GMT).
What is UTC?
The global reference time; zones are UTC +/- hours
UTC (Coordinated Universal Time) is the primary time standard. EST = UTC-5, PST = UTC-8, London = UTC+0 (winter). All zones are expressed as offset from UTC.
How does Daylight Saving Time affect conversions?
Changes offsets by 1 hour; dates vary by region
DST shifts clocks 1 hour (spring forward, fall back). Not all regions observe DST, and dates vary globally. Always verify current offset during spring/fall.
Still have questions? Try the tool yourself!
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