GMT/BST to IST

Conversion table

Common times in GMT/BST and their equivalents in IST:

Table computed using a fixed reference date to keep output stable. Use the full converter for any date and time.

Common meeting times

Quick translations for typical business hours in Greenwich Mean Time:

• 9:00 AM GMT/BST→2:30 PM IST
• 12:00 PM GMT/BST→5:30 PM IST
• 3:00 PM GMT/BST→8:30 PM IST
• 5:00 PM GMT/BST→10:30 PM IST

Best time to schedule a call

The ideal window where both GMT/BST and IST are inside business hours (08:00–18:00) is 8:00 AM–12:30 PM GMT/BST, which is 1:30 PM–6:00 PM IST.

Upcoming offset transitions

At least one of these zones observes DST. The hours-apart number changes on the following dates over the next 12 months:

• Mar 30, 2026 — gap becomes +4.5h
• Oct 26, 2026 — gap becomes +5.5h

Sample calendar invite

Copy-paste this into your calendar event so attendees see both zones spelled out.

Subject: Sync meeting
Time: 10:00 AM GMT/BST (Greenwich Mean Time) = 3:30 PM IST (India Standard Time)
Date: Thursday, 15 January 2026
Notes: Greenwich Mean Time ↔ India Standard Time conversion handled with DST applied automatically.

About Greenwich Mean Time and India Standard Time

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Frequently asked questions

What time is it in India Standard Time when it's noon in Greenwich Mean Time?

When it's 12:00 PM GMT/BST, it's 5:30 PM IST.

What's the best time to schedule a call between GMT/BST and IST?

Business-hour overlap (08:00–18:00 in both zones) lands at 8:00 AM–12:30 PM GMT/BST, which is 1:30 PM–6:00 PM IST. Schedule inside that window for both sides to be in their working day.

Does the time difference between GMT/BST and IST change during the year?

Yes — at least one zone observes daylight saving time, so the gap shifts during the year. Upcoming transitions: Mar 30, 2026, Oct 26, 2026.

Does this converter handle daylight saving time?

Yes. All calculations use the IANA time zone database (via Luxon), so DST transitions for both Greenwich Mean Time and India Standard Time are applied automatically.