Convert GMT to IST Instantly & Accurately
IST is 5 hours 30 minutes ahead of GMT. See both time zones live, convert any time, and find the perfect meeting window.
Time Zone Converter
Enter a time in either zone and get instant conversion.
Time Difference
IST is exactly 5 hours and 30 minutes ahead of GMT. This offset remains constant year-round since India does not observe Daylight Saving Time.
What is GMT?
Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It has been used as the global time standard since 1884 and is equivalent to UTC+0.
GMT — Greenwich Mean Time
UTC+0:00Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It has been used as the global time standard since 1884 and is equivalent to UTC+0.
What is IST?
India Standard Time (IST) is the time zone observed throughout India and Sri Lanka, with an offset of UTC+5:30. India uses a single time zone despite spanning roughly 30° of longitude.
IST — Indian Standard Time
UTC+5:30India Standard Time (IST) is the time zone observed throughout India and Sri Lanka, with an offset of UTC+5:30. India uses a single time zone despite spanning roughly 30° of longitude.
GMT to IST Quick Reference
Common time conversions between GMT and IST.
| GMT Time | IST Time | Period |
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Convert GMT to Other Time Zones
Greenwich Mean Time converted to popular time zones around the world
Convert IST to Other Time Zones
India Standard Time converted to popular time zones around the world
Frequently Asked Questions
What is the time difference between GMT and IST? ↓
IST (India Standard Time) is 5 hours and 30 minutes ahead of GMT (Greenwich Mean Time). For example, when it's 12:00 PM (noon) GMT, it's 5:30 PM IST. This offset is constant throughout the year because India does not observe Daylight Saving Time.
How do I convert GMT to IST manually? ↓
Simply add 5 hours and 30 minutes to any GMT time. For instance, 10:00 AM GMT becomes 3:30 PM IST. If the result goes past midnight (24:00), subtract 24 hours and move to the next calendar day. Example: 11:00 PM GMT → 4:30 AM IST (next day).
Does India observe Daylight Saving Time (DST)? ↓
No. India Standard Time (IST) does not observe Daylight Saving Time. The UTC+5:30 offset remains the same throughout the entire year. However, note that the UK switches to BST (British Summer Time, UTC+1) from late March to late October, which temporarily reduces the difference to 4 hours and 30 minutes.
Is GMT the same as UTC? ↓
For everyday purposes, GMT and UTC are effectively the same (both represent UTC+0). Technically, GMT is a time zone while UTC is a time standard based on atomic clocks. The difference is less than a second and negligible for time conversions. This converter treats them as equivalent.
What countries use IST (UTC+5:30)? ↓
The UTC+5:30 offset is used by India and Sri Lanka. Despite India's vast east-west span (about 2,933 km), the entire country uses a single time zone. The time is calculated based on the 82.5°E meridian near Mirzapur, Uttar Pradesh.
About GMT to IST Converter
At GMT to IST Converter, we believe time zone conversions should be simple, accurate, and instant. Our mission is to help people around the world coordinate across time zones effortlessly.
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What is GMT?
Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It has been used as the global time standard since 1884 and is equivalent to UTC+0.
What is IST?
India Standard Time (IST) is the time zone observed throughout India and Sri Lanka, with an offset of UTC+5:30. India uses a single time zone despite spanning roughly 30° of longitude.
Time Difference
IST is exactly 5 hours and 30 minutes ahead of GMT. This offset remains constant year-round since India does not observe Daylight Saving Time.