Convert NPT to IST
IST is 15 minutes behind NPT. NPT is UTC+5:45 and IST is UTC+5:30.
Right now: NPT · IST
Which IST is this?
IST names more than one zone. This page reads it as India Standard Time at UTC+5:30, which is the reading most converters take. There are others: Israel Standard Time at UTC+2, used in Israel in winter; Irish Standard Time at UTC+1, used in Ireland in summer.
The letters on a meeting invitation do not say which one is meant. If yours is not India Standard Time, the answer above is wrong, and not by a little:
| If IST means | Then |
|---|---|
| India Standard Time — assumed on this page | IST is 0.3 hours behind NPT |
| Israel Standard Time | IST is 3.8 hours behind NPT |
| Irish Standard Time | IST is 4.8 hours behind NPT |
The large converter sites disagree about this as well: search for a IST conversion and some of the results answer for one reading and some for another, none of them saying which they chose. Where it matters, ask which country the sender is in rather than which letters they typed.
Best time to schedule a meeting
Standard 9–5 working hours overlap for 7 hours: 10:00 AM–5:00 PM NPT (9:00 AM–4:00 PM IST). Schedule meetings inside that window.
| NPT | IST | Suitable? |
|---|---|---|
| 9:00 AM | 8:45 AM | outside 9–5 |
| 10:00 AM | 9:45 AM | working hours |
| 11:00 AM | 10:45 AM | working hours |
| 12:00 PM | 11:45 AM | working hours |
| 1:00 PM | 12:45 PM | working hours |
| 2:00 PM | 1:45 PM | working hours |
| 3:00 PM | 2:45 PM | working hours |
| 4:00 PM | 3:45 PM | working hours |
| 5:00 PM | 4:45 PM | working hours |
NPT to IST conversion table
| NPT | IST |
|---|---|
| 12:00 AM | 11:45 PM (previous day) |
| 1:00 AM | 12:45 AM |
| 2:00 AM | 1:45 AM |
| 3:00 AM | 2:45 AM |
| 4:00 AM | 3:45 AM |
| 5:00 AM | 4:45 AM |
| 6:00 AM | 5:45 AM |
| 7:00 AM | 6:45 AM |
| 8:00 AM | 7:45 AM |
| 9:00 AM | 8:45 AM |
| 10:00 AM | 9:45 AM |
| 11:00 AM | 10:45 AM |
| 12:00 PM | 11:45 AM |
| 1:00 PM | 12:45 PM |
| 2:00 PM | 1:45 PM |
| 3:00 PM | 2:45 PM |
| 4:00 PM | 3:45 PM |
| 5:00 PM | 4:45 PM |
| 6:00 PM | 5:45 PM |
| 7:00 PM | 6:45 PM |
| 8:00 PM | 7:45 PM |
| 9:00 PM | 8:45 PM |
| 10:00 PM | 9:45 PM |
| 11:00 PM | 10:45 PM |
About NPT
Nepal Time (NPT) is UTC+5:45. It is used in Nepal, all year.
Nepal Time is UTC+5:45 — the only zone in the world offset by three quarters of an hour, set so that noon falls over Kathmandu rather than over the Indian meridian fifteen minutes away. It breaks almost every piece of software that stores offsets in whole or half hours, and it is fifteen minutes ahead of India rather than the round number people assume.
About IST
India Standard Time (IST) is UTC+5:30. It is used in all of India and Sri Lanka, on a half-hour offset.
India Standard Time is UTC+5:30 — one of the handful of zones offset by half an hour, which breaks any code that assumes whole-hour offsets and any mental arithmetic that does the same. India has no daylight saving and one time zone for the entire country, despite spanning nearly 30 degrees of longitude. The abbreviation is also used for Irish Standard Time and Israel Standard Time, both of which are entirely different offsets.
Does this gap change with the seasons?
Neither NPT nor IST shifts with the seasons, so this 0.25-hour difference holds all year. That is unusual enough to be worth relying on: most cross-continental gaps move twice a year.
This is the reason scheduling systems store an IANA zone such as Region/City rather than an offset or an abbreviation: the zone knows its own rules and the offset does not.
Frequently asked questions
What time is 9:00 AM NPT in IST?
9:00 AM NPT is 8:45 AM IST.
Is IST ahead of NPT?
IST is 15 minutes behind NPT.
Which time zone does this use?
NPT is UTC+5:45 and IST is UTC+5:30. Both abbreviations denote a single fixed offset, so this conversion never shifts with daylight saving — what changes is which abbreviation a place is using at the time.