Time Zone Converter

Convert time between time zones free online using your browser's built-in time zone database. Schedule meetings or calls across regions accurately, including DST handling.

Date and Time

From Time Zone

To Time Zone

Uses your browser's built-in IANA time zone database -- handles DST correctly.

How to Use This Tool

Enter a date and timeThe moment you want to convert

Choose source and target time zonesFrom the standard IANA zone list

See the converted timeCorrectly accounting for DST where applicable

Time Zone Converter is a free online tool that works entirely in your browser — no signup, no data uploaded, no limits.

Why a Fixed Hour Offset Gets It Wrong Part of the Year

Many regions shift their clocks for Daylight Saving Time during part of the year, changing their actual offset from UTC temporarily. A converter using a fixed hour difference would be correct for half the year and wrong for the other half in any region observing DST -- which is exactly why this tool relies on the IANA time zone database rather than a simple fixed offset.

The IANA Database -- The Authoritative Standard

This is the same time zone data source operating systems, programming languages, and most serious software rely on, tracking each region's actual historical and current DST rules, transition dates, and even non-standard offsets like half-hour zones. Browsers keep this data updated as governments adjust their rules, which is why relying on the browser's built-in implementation stays accurate over time.

Useful for Quick Scheduling Checks

Confirming what time a meeting mentioned by a colleague in another region actually falls at in your own time zone, without creating a full calendar event just to check, is a common practical use for a tool like this -- fast verification rather than full scheduling.

Frequently Asked Questions

It uses the browser's built-in Intl.DateTimeFormat API, which relies on the IANA time zone database -- the same authoritative, regularly updated source operating systems and most software use. This database tracks each region's actual DST rules and transition dates, so conversions stay correct even as DST start and end dates shift slightly year to year.

Many regions observe Daylight Saving Time, shifting their offset from UTC by an hour during part of the year, while other regions don't observe DST at all. A fixed-hour-offset approach would be correct only part of the year for places that follow DST, which is why relying on an actual time zone database matters.

Yes, several regions use half-hour or even 45-minute offsets from UTC rather than whole hours, and the underlying time zone database correctly represents these non-standard offsets where they apply.

Quickly checking what time a specific moment is in another region, without needing to create an actual calendar event, is often faster for casual scheduling conversations or confirming a meeting time mentioned by someone in a different zone.

The IANA time zone database this relies on is actively maintained and updated as governments change DST rules or time zone boundaries, and browsers regularly receive these updates, keeping the underlying data current.