Free Time Zone Calculator

Convert a time from one time zone to another.

Uses the IANA time zone database (built into every modern browser) rather than a fixed UTC-offset table, so daylight saving time transitions are handled automatically and correctly for each zone's actual rules.

Worked Example

Example: 3:00 PM in New York (America/New_York) converts to 8:00 PM in London (Europe/London) during standard time, or a different offset during DST — the tool calculates the correct current offset automatically.

Formula / Method

Uses Intl.DateTimeFormat with the timeZone option to render the same underlying UTC instant in each zone's local wall-clock time.

Worked Example

Example: 3:00 PM in New York (America/New_York) converts to 8:00 PM in London (Europe/London) during standard time, or a different offset during DST — the tool calculates the correct current offset automatically.

Formula / Method

Uses Intl.DateTimeFormat with the timeZone option to render the same underlying UTC instant in each zone's local wall-clock time.