Timezone Converter

Convert a date and time between two timezone abbreviations — EST, PST, GMT, IST, JST, CET, AEST and 170+ more, from UTC-11 to UTC+14 — without doing the math yourself.

How to use it

1. Pick the source timezone (Convert from) and the target timezone (Convert to).
2. Optionally enter a date and time. Leave both blank and the tool converts the current moment.
3. The result updates automatically: the source time restated with its zone, the converted time in the target zone, and the plain-English difference between the two ("PST is 3 hours behind EST").

How the conversion works

Each abbreviation maps to a fixed UTC offset — EST is always UTC-5, EDT is always UTC-4, and so on — rather than a named region whose offset shifts with daylight saving. That matches what "EST to PST" actually means to someone typing it into a search bar: a specific, named offset, not "wherever New York's clock happens to be that week." Enter a date if you care about a specific day (say, scheduling a meeting); the offset used is still the one for the abbreviation you picked, not whatever daylight rule applies on that date.

Why not just look up the region's current offset?

Because the abbreviation already answers that question. If you wanted "Eastern Time right now," you'd pick EST or EDT depending on the season — picking a region and having the tool guess the season for you would silently produce the wrong answer half the year.

Does it run on my device?

Yes — the conversion is pure arithmetic that runs entirely in your browser. No date or timezone you enter is sent anywhere.