Time Zone Calculator
Converts a clock time between manually entered UTC offsets. It does not look up daylight-saving rules for individual locations.
How it works
Fixed UTC offset time conversion
Formula and assumptions
Converted time = source clock time + (target UTC offset − source UTC offset). Enter the offsets applicable on the date you care about; daylight-saving changes are not automatically detected.
Example
Use the sample values, calculate, and change one input at a time.
Frequently asked questions
Are results exact? Results depend on the assumptions and inputs above.
Can I use this for professional decisions? Verify critical results independently.
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Frequently asked questions
Does it account for daylight saving time?
No. Enter the UTC offsets that apply to the locations on the date you are checking.
What should I check before relying on the result?
Confirm the input units and assumptions described above; independently verify safety-critical, medical, financial or professional decisions.