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Arnaud.app

GMT to IST Converter (India Time)

Convert GMT to India Standard Time instantly. IST is GMT+5:30 year-round, no DST (e.g. 12:00 GMT = 5:30 PM IST). Free - schedule calls between India and the world.

In Asia/Kolkata

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Pre-filled to convert GMT (Greenwich Mean Time) to India Standard Time. GMT is the same as UTC for this purpose; IST is GMT+5:30 year-round with no DST. We use the IANA zones Etc/GMT and Asia/Kolkata.

How to use it

  1. Pick a source timezone

    Choose the timezone you're starting from. IANA names like Europe/Paris or Asia/Tokyo work; we expose dozens of common ones.

  2. Pick a target timezone

    Choose where you want the converted time. Daylight-saving rules for both zones are applied automatically.

  3. Pick a date and time

    Default is now. Change the date to see the converted time on a specific day - including across DST boundaries.

What is it?

A timezone converter translates a date and time from one IANA timezone (e.g. America/New_York) to another (e.g. Asia/Tokyo), automatically applying daylight saving transitions. The arithmetic isn't 'add 14 hours' because the offset between zones changes twice a year - and the dates of those changes differ between countries. Our converter uses the browser's bundled IANA tz database, which is the same data Linux, macOS and Postgres use.

When to use it

Coordinating meetings across continents, scheduling product launches, debugging server logs (which are usually in UTC) against local user reports, converting flight times across hubs, or simply checking 'what time is it in Mumbai right now?' Also useful for journalists translating press-release embargoes and for finance teams aligning market open/close.

Common mistakes

Treating EST and EDT as separate, manually-tracked zones; they're the same physical region and the IANA name (America/New_York) covers both. Forgetting that some countries (India, China, Iran) do not observe DST. And assuming 'GMT' and 'UTC' are interchangeable in all contexts - they are for time of day, but GMT is technically a time zone whereas UTC is an atomic time standard.

FAQ

How is DST handled?
We use the IANA timezone database via the browser's Intl API, so daylight saving rules - including historical and future changes - are correct for every supported zone.

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Timezone Converter

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