time-date Verified Precision Tool
Time Zone Difference Calculator
Calculate the hour and minute difference between any two cities or time zones.
🌐 Time Zone & Offset Calculator
Convert times globally with real-time flag location pickers, IANA DST accuracy, and hour diff analysis.
Popular:
Offset: UTC-4:00EST/EDT/ET
Offset: UTC+1:00GMT/BST
🌐
Converted Local Time Result+5 hrs
Tue, Sep 1, 2026, 06:00:00 PM
London is 5 hours ahead of New York
New YorkCountry:United States
Timezone IANA:America/New_York
Abbreviations:EST, EDT, ET
LondonCountry:United Kingdom
Timezone IANA:Europe/London
Abbreviations:GMT, BST
Mathematical Formula
Difference = Destination IANA Offset minus Source IANA Offset
Overview & Explanation
Calculates the net hour difference between two global locations.
How It Works
- Evaluates current UTC offsets for both locations and subtracts them.
Practical Applications
- Comparing travel time gaps.
- Scheduling call windows.
Worked Example: New York vs Tokyo
Calculate time gap.
1
Calculate Gap
UTC-4 vs UTC+9
= Tokyo is 13 hours ahead of New York
Frequently Asked Questions
How many hours is Tokyo ahead of New York?
Tokyo is 13 hours ahead of New York during EDT (14 hours during EST).
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