Convert UTC to IST Coordinated Universal Time ↔ India Standard Time Free Online Secure
Type a time in UTC and read it in IST straight away. The offset is +5:30 h, the arithmetic wraps at midnight, and the answer says which day it lands on.
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Through the day — Convert UTC to IST (Coordinated Universal Time ↔ India Standard Time)
| UTC | IST |
|---|---|
| 00:00 | 05:30 |
| 03:00 | 08:30 |
| 06:00 | 11:30 |
| 09:00 | 14:30 |
| 12:00 | 17:30 |
| 15:00 | 20:30 |
| 18:00 | 23:30 |
| 21:00 | 02:30 |
Where these units come from
Until the middle of the nineteenth century every town kept its own noon, set by the sun overhead, and nobody minded that the next town was four minutes behind. Railways ended that: a timetable cannot be written for a hundred local noons. Britain put its railways on Greenwich time in 1847, and in 1884 the International Meridian Conference in Washington chose Greenwich as the prime meridian and sketched the twenty-four-hour scheme we still use. Greenwich Mean Time was the world's reference until 1972, when Coordinated Universal Time replaced it: UTC is kept by atomic clocks and tied back to the turning Earth by leap seconds. The abbreviations on this page name standard time — the winter setting — which is why each one is a fixed number of hours rather than something that drifts through the year.
Where you meet them
A time zone becomes real the moment two people in different places have to agree on one moment: a call between offices, a flight that lands before it took off, a market that opens while you are asleep, a deadline written in somebody else's afternoon. Server logs, train and flight schedules and anything stamped with a time are kept in UTC precisely so that the question can always be settled, no matter whose clock was on the wall.
Questions people ask
What about summer time?
The offsets here are standard-time offsets, the ones a zone keeps in winter. Where summer time is observed, the same places move one hour further on for part of the year and take a different name: Central European Time becomes Central European Summer Time, Eastern Standard Time becomes Eastern Daylight Time. The switching dates are not the same in every country, and the two hemispheres change in opposite months, so for a date inside a summer-time period add an hour to whichever side observes it.
Why isn't every difference a whole number of hours?
Because offsets are decided by governments, not by geometry. India is half an hour off the hour, at UTC+05:30; Nepal is three quarters, at UTC+05:45; the Chatham Islands are at UTC+12:45. Any of these can be changed by law, and several countries have moved their offset within living memory.
Is the answer exact?
Where both units are defined in terms of one another by whole numbers, yes — the page says so above the figure, and the only rounding is in how many digits are shown. Where the ratio has no finite decimal, the page shows twelve significant digits and says the relation is approximate rather than pretending otherwise.
Does anything I type leave my device?
No. The arithmetic runs in your browser; nothing is uploaded and there is no server to upload it to. Load the page once and it keeps working with the network switched off.
The world clock on an Indian wall
India’s weather service makes its main observations at 03:00 and 12:00 UTC. The country’s instant payment network runs around the clock and stamps every transaction. A tax return is due “by the end of the day”. People who read these times in India look at the wall clock, Indian Standard Time, which is five and a half hours ahead of UTC, so they must convert UTC to IST. The rule is to add 5 hours and 30 minutes: 03:00 UTC is 08:30 IST, 12:00 UTC is 17:30 IST, and 18:30 UTC is midnight in India on the next date. India does not change its clocks, so the rule is the same in every month.
The page below shows how to convert UTC to IST, offers two lookup tables, explains the half hour, and applies the rule to weather bulletins, payments, tax deadlines, trains and observatories. The calculation runs in your browser, and nothing you type is sent to a server.
The sum behind a “convert UTC to IST” calculation
Add five and a half hours
IST is UTC+5:30. Add 5 hours and 30 minutes to the UTC time. A quicker way is to add 6 hours and take off 30 minutes. If the total reaches 24:00, subtract 24 and advance the date. For example, 20:15 UTC plus 5:30 is 25:45, which is 01:45 IST on the next date.
The minutes shift
Because of the half hour, every minute reading moves by thirty: :00 becomes :30, :15 becomes :45, and :30 becomes :00 of the following hour. If your answer keeps the same minutes as your input, you used a different zone.
The 18:30 landmark
At 18:30 UTC it is exactly midnight in India. Every UTC reading from 18:30 onward falls on the next Indian date. This line is especially useful for evening maintenance windows and tax deadlines.
UTC, the scale behind every observation
No summer time
UTC never changes its clock. Atomic clocks maintain it, and leap seconds adjust it from time to time; the last was at the end of 2016. Meteorologists, airlines, banks and data centres use it because a single figure is valid anywhere.
The ISO form
An instant written 2026-01-12T12:00:00Z can be written 2026-01-12T17:30:00+05:30. Both describe the same moment, and a program that reads the offset converts without help.
IST, India’s single clock
One zone for a big country
Indian Standard Time, UTC+5:30, is based on the meridian at 82.5 degrees east, close to the middle of the country. It is the only official zone although India spans nearly thirty degrees of longitude. Sri Lanka has the same offset, Nepal UTC+5:45, Pakistan UTC+5 and Bangladesh UTC+6.
No clock changes
India does not observe daylight saving time, which is why the gap to UTC is 5:30 in every month. The gap to Europe or America changes only because they move their clocks.
Mind the abbreviation
IST can also mean Irish Standard Time or Israel Standard Time. On this page it always means India.
The working day and the half hour
Overlapping dials
An Indian team working 09:00 to 17:00 IST works from 03:30 to 11:30 UTC. A European team working 08:00 to 16:00 UTC overlaps with it from 08:00 to 11:30 UTC, which is 13:30 to 17:00 IST. The shared window is three and a half hours long.
Maintenance windows
A window from 20:00 to 22:00 UTC falls between 01:30 and 03:30 IST, in the dead of night, so it affects few Indian users. The same window from 04:00 to 06:00 UTC falls between 09:30 and 11:30 IST, in the middle of the working morning, and should be avoided.
Daily reports
A report that closes at 00:00 UTC covers, for India, the day from 05:30 to 05:30. Payments made between midnight and 05:30 IST appear in the previous day’s UTC report. Accountants need to know.
Weather observations and the monsoon
Two observation hours
The main synoptic observations of the Indian weather service are made at 08:30 and 17:30 IST, which are 03:00 and 12:00 UTC. Monsoon bulletins come out after these hours. A forecaster in Europe who reads “the 12 UTC observation” finds that on the Indian wall clock it is 17:30.
Onset of the monsoon
The south-west monsoon reaches the Kerala coast in early June. Announcements of its arrival carry IST. A “convert UTC to IST” calculation done for each announcement tells you which UTC date the event belongs to, especially if the statement is made after the Indian midnight.
The instant payment network
Round-the-clock transactions
India’s instant payment system handles billions of transactions a month, at any hour. Each carries a time stamp, which in central systems is in UTC. A payment made at 23:50 IST is recorded at 18:20 UTC on the same date. A payment made at 00:10 IST is recorded at 18:40 UTC on the previous date.
Statements and disputes
On a bank statement the date appears in Indian time. If a European firm compares the statement with its own log in UTC, payments after the Indian midnight seem to have a different date. It is not an error; it is the gap of five and a half hours.
Tax deadlines
The end of the day at 23:59 IST
Many Indian deadlines expire at the end of the day, at 23:59 IST, which is 18:29 UTC. An accountant in Europe who sends the document at 19:00 UTC has missed the deadline by 31 minutes, even though the local clock still shows the afternoon.
Monthly filings
Monthly consumption-tax returns have deadlines on the 11th and the 20th of the month. Someone working in UTC writes the deadline as “18:29 UTC on that day”. A “convert UTC to IST” calculation done in advance removes any ambiguity about the day on which the deadline falls.
Trains and local services
Timetables on a 24-hour clock
Indian Railways publishes timetables on a 24-hour clock in local time. A train that leaves Delhi at 16:55 IST leaves at 11:25 UTC. A night train that leaves at 22:30 IST leaves at 17:00 UTC.
Mumbai’s suburban trains
The first suburban trains in Mumbai run from about 04:00 IST, which is 22:30 UTC on the previous date. The last services leave around 01:00 IST, which is 19:30 UTC. Commuters, tourists and researchers who compare movement data in UTC must remember that the Indian day starts on the previous UTC date.
Air quality in Delhi
Hourly values
The air-quality monitoring network in Delhi publishes hourly values. A peak at 08:00 IST appears at 02:30 UTC, and one at 22:00 IST at 16:30 UTC. In winter, when smog is at its worst, researchers who compare the data with European measurements must convert every hour.
School alerts
Alerts that close schools are announced the evening before. An announcement at 20:00 IST is at 14:30 UTC, which a reader in London sees at 14:30 GMT in the middle of the afternoon.
Cloud regions in India
Mumbai and Hyderabad
Large cloud providers run regions in Mumbai and Hyderabad. Consoles display the time of the zone chosen in a profile, while logs are kept in UTC. An incident at 05:30 UTC appears as 11:00 on the screen of an administrator set to IST.
Scheduled jobs
A backup scheduled as “30 18 * * *” runs at 18:30 UTC, which is midnight in India. An engineer in Mumbai who wants it at 02:00 IST must set 20:30 UTC. Forgetting the half hour when you convert UTC to IST leaves the job half an hour off.
The evening ceremony on the Ganges
Aarti in Varanasi
Every evening on the riverbank in Varanasi a ceremony with lamps begins around 18:45 IST, which is 13:15 UTC. Visitors from Europe who watch the online stream see it in their late afternoon.
The hour varies
The ceremony starts after sunset, so the hour moves with the season. In the long days of summer it may begin at 19:15 IST, which is 13:45 UTC. Check the day’s announcement before you convert.
Cyclone warnings in the Bay of Bengal
Bulletins in Zulu
Bulletins about cyclones in the Bay of Bengal are issued in Zulu hours and then rendered in IST. A bulletin “valid until 1200Z” is valid until 17:30 IST. Fishermen on the east coast read the local time, while those coordinating relief from Europe read UTC.
Why it matters
Every hour in a bulletin should be converted carefully, since a mistake of five and a half hours can mean the difference between a timely evacuation and a late one.
The observatory at Hanle
Nights in universal time
The astronomical observatory in Ladakh, more than 4,500 metres above sea level, plans its nights in universal time, because its collaborations are international. A night from 14:00 to 23:00 UTC runs from 19:30 to 04:30 IST. European astronomers who submit proposals must convert UTC to IST for each window.
Time stamps on images
Images carry UTC stamps. A photograph taken at 21:10 UTC was taken at 02:40 IST on the next day, so the date in the local register differs from that in the international archive.
Asian zones, counted from UTC
The ladder
From UTC add 3 hours for Moscow, 4 for Dubai, 5 for Pakistan, 5:30 for India and Sri Lanka, 5:45 for Nepal, 6 for Bangladesh, 8 for China and Singapore, and 9 for Japan.
One moment on five clocks
When UTC reads 12:00, Dubai reads 16:00, Mumbai 17:30, Dhaka 18:00 and Tokyo 21:00. A list of this kind spares every reader a separate convert UTC to IST.
Dated examples
January
On Monday 12 January, 10:00 UTC is 15:30 IST. There is no summer time, so you always add 5:30.
The end of March
On Monday 30 March, 10:00 UTC is still 15:30 IST. India does not change its clocks, even though Europe moved the day before.
July
On Monday 13 July, 10:00 UTC is 15:30 IST. In Central Europe the same moment is 12:00 CEST, so it is the gap to Europe that has shrunk, not the gap to UTC.
November
On Monday 9 November, 10:00 UTC is 15:30 IST. The figure is the same in every month.
A pair without summer time
Period by period
UTC and IST both stay on fixed offsets all year, which gives one relationship on every date: IST is 5 hours 30 minutes ahead of UTC.
In practice
The same rule applies in every month: the same 5 hours 30 minutes shift. You can convert UTC to IST on any date with the same rule.
Hour-by-hour conversion chart
UTC to IST, every hour
00:00 UTC = 05:30 IST. 01:00 UTC = 06:30 IST. 02:00 UTC = 07:30 IST. 03:00 UTC = 08:30 IST. 04:00 UTC = 09:30 IST. 05:00 UTC = 10:30 IST. 06:00 UTC = 11:30 IST. 07:00 UTC = 12:30 IST. 08:00 UTC = 13:30 IST. 09:00 UTC = 14:30 IST. 10:00 UTC = 15:30 IST. 11:00 UTC = 16:30 IST. 12:00 UTC = 17:30 IST. 13:00 UTC = 18:30 IST. 14:00 UTC = 19:30 IST. 15:00 UTC = 20:30 IST. 16:00 UTC = 21:30 IST. 17:00 UTC = 22:30 IST. 18:00 UTC = 23:30 IST. 19:00 UTC = 00:30 IST (next day). 20:00 UTC = 01:30 IST (next day). 21:00 UTC = 02:30 IST (next day). 22:00 UTC = 03:30 IST (next day). 23:00 UTC = 04:30 IST (next day).
A short guide
Each entry converts one full hour from UTC to IST, flagging any change of date. If you only need to convert UTC to IST once, the form above is quicker; for many readings, keep this chart at hand. The half-hour in the offset moves each minute reading by thirty, which is why this pair needs a second look.
Half past every hour
UTC :30 against IST
00:30 UTC = 06:00 IST. 01:30 UTC = 07:00 IST. 02:30 UTC = 08:00 IST. 03:30 UTC = 09:00 IST. 04:30 UTC = 10:00 IST. 05:30 UTC = 11:00 IST. 06:30 UTC = 12:00 IST. 07:30 UTC = 13:00 IST. 08:30 UTC = 14:00 IST. 09:30 UTC = 15:00 IST. 10:30 UTC = 16:00 IST. 11:30 UTC = 17:00 IST. 12:30 UTC = 18:00 IST. 13:30 UTC = 19:00 IST. 14:30 UTC = 20:00 IST. 15:30 UTC = 21:00 IST. 16:30 UTC = 22:00 IST. 17:30 UTC = 23:00 IST. 18:30 UTC = 00:00 IST (next day). 19:30 UTC = 01:00 IST (next day). 20:30 UTC = 02:00 IST (next day). 21:30 UTC = 03:00 IST (next day). 22:30 UTC = 04:00 IST (next day). 23:30 UTC = 05:00 IST (next day).
A note on the list
Schedules often use :30 slots. Each entry below gives the IST equivalent, so you do not have to convert UTC to IST again for them.
Readings that are not round
UTC to IST, with minutes
01:05 UTC = 06:35 IST. 03:20 UTC = 08:50 IST. 05:50 UTC = 11:20 IST. 07:35 UTC = 13:05 IST. 10:10 UTC = 15:40 IST. 13:25 UTC = 18:55 IST. 16:40 UTC = 22:10 IST. 19:55 UTC = 01:25 IST (next day). 22:15 UTC = 03:45 IST (next day). 23:05 UTC = 04:35 IST (next day).
A remark on the minutes
Use these when your time is not on the hour or half hour. Watch the minutes: a thirty-minute difference means :00 and :30 swap places and the hour is adjusted accordingly.
Morning, afternoon or night?
From UTC to IST, with the time of day
06:00 UTC = 11:30 IST (morning). 08:00 UTC = 13:30 IST (around midday). 10:00 UTC = 15:30 IST (afternoon). 12:00 UTC = 17:30 IST (afternoon). 14:00 UTC = 19:30 IST (evening). 16:00 UTC = 21:30 IST (evening). 18:00 UTC = 23:30 IST (night). 20:00 UTC = 01:30 IST (night). 22:00 UTC = 03:30 IST (night).
Why it matters
A conversion is only half the answer: the other half is whether the result is a sensible hour. After you convert UTC to IST, check the bracketed word.
Before you convert UTC to IST: a short checklist
Preparation
Check the zone names
UTC is the reference that other zones are measured against; it has no daylight saving. The letters IST are shared with Ireland’s summer clock and Israel’s standard time; this page means India.
Use a 24-hour clock
Turn a.m. and p.m. into the 24-hour form first: 4:30 p.m. is 16:30 and 12:00 a.m. is 00:00. For example, 09:15 UTC becomes 14:45 IST.
Then
The operation
Add 5 hours 30 minutes. If the result passes midnight, correct the date: readings from 18:30 fall on the next date.
A second example
An evening check: 22:40 UTC gives 04:10 IST (next day).
Traps to avoid when you convert UTC to IST
Subtracting instead of adding
IST is in front of UTC: expect a bigger number, not a smaller one.
Losing the date
Anything on the UTC clock from 18:30 lands on the next date. Forgetting to move the date leaves the result 24 hours wrong.
Hunting for a summer correction
Neither UTC nor IST changes its clock, so there is no summer correction to make. The same figure applies in every month.
Confusing the abbreviation
UTC never changes with the seasons, so the suffix Z always means the same instant everywhere. Indian Standard Time is UTC+5:30; the same three letters are used for Israel and for Ireland’s summer clock, which this page does not cover.
Quick answers
What is the difference between UTC and IST?
5 hours 30 minutes, and IST is ahead of UTC.
How do I convert UTC to IST?
Add 5 hours 30 minutes to the UTC time, then fix the date if the result passes midnight.
How much is 09:00 UTC in IST?
14:30 IST.
Does the answer change during the year?
No. The relationship is the same all year.
Is my input stored or uploaded?
No. Everything happens on your own device.
Other pairs worth a look
You may also want Convert UTC to WET, Convert UTC to CST, Convert PST to IST, Convert CET to IST, Convert IST to EST, Convert WET to UTC, Convert WET to CET, Convert IST to GMT, Convert PST to CST. To go the other way, use Convert IST to UTC.
In brief, to convert UTC to IST you add 5 hours 30 minutes, mind the date change and keep an eye on the date.