GMT to IST — Time Zone Converter
Greenwich Mean Time (GMT, UTC+0) covers the United Kingdom; India Standard Time (IST, UTC+5:30) covers India. In standard time, IST is 5½ hours ahead of GMT. Mornings in the United Kingdom overlap with afternoons in India, which keeps both sides inside office hours. Use the live converter below — it applies today's IANA time zone data, including daylight saving time, and gives you a meeting schedule you can paste straight into email or Slack.
GMT to IST, hour by hour (today)
Frequently asked questions
What is the time difference between GMT and IST?+
Greenwich Mean Time (GMT) is UTC+0 and India Standard Time (IST) is UTC+5:30, so in standard time IST is 5½ hours ahead of GMT. The gap shifts by an hour around daylight saving transitions, so always check a live converter near the change dates in spring and autumn.
Does GMT or IST observe daylight saving time?+
Greenwich Mean Time observes daylight saving time (GMT in winter, BST in summer). India Standard Time stays on UTC+5:30 all year — no daylight saving time.
What is the best time for a meeting between GMT and IST?+
Mornings in the United Kingdom overlap with afternoons in India, which keeps both sides inside office hours. The converter above highlights office hours in green for both zones, so you can slide to a time that works for everyone.
How do I share a GMT to IST meeting time by email?+
Pick a time in the converter, log it to the Smart Clipboard, and copy it as bullets, a formatted table, or a one-line question — with both GMT and IST times spelled out so nobody has to do the math.