Convert NPT to ACST
ACST is 3 hours 45 minutes ahead of NPT. NPT is UTC+5:45 and ACST is UTC+9:30.
Right now: NPT · ACST
Best time to schedule a meeting
Standard 9–5 working hours overlap for 5 hours: 9:00 AM–2:00 PM NPT (12:00 PM–5:00 PM ACST). Schedule meetings inside that window.
| NPT | ACST | Suitable? |
|---|---|---|
| 9:00 AM | 12:45 PM | working hours |
| 10:00 AM | 1:45 PM | working hours |
| 11:00 AM | 2:45 PM | working hours |
| 12:00 PM | 3:45 PM | working hours |
| 1:00 PM | 4:45 PM | working hours |
| 2:00 PM | 5:45 PM | outside 9–5 |
| 3:00 PM | 6:45 PM | outside 9–5 |
| 4:00 PM | 7:45 PM | outside 9–5 |
| 5:00 PM | 8:45 PM | outside 9–5 |
NPT to ACST conversion table
| NPT | ACST |
|---|---|
| 12:00 AM | 3:45 AM |
| 1:00 AM | 4:45 AM |
| 2:00 AM | 5:45 AM |
| 3:00 AM | 6:45 AM |
| 4:00 AM | 7:45 AM |
| 5:00 AM | 8:45 AM |
| 6:00 AM | 9:45 AM |
| 7:00 AM | 10:45 AM |
| 8:00 AM | 11:45 AM |
| 9:00 AM | 12:45 PM |
| 10:00 AM | 1:45 PM |
| 11:00 AM | 2:45 PM |
| 12:00 PM | 3:45 PM |
| 1:00 PM | 4:45 PM |
| 2:00 PM | 5:45 PM |
| 3:00 PM | 6:45 PM |
| 4:00 PM | 7:45 PM |
| 5:00 PM | 8:45 PM |
| 6:00 PM | 9:45 PM |
| 7:00 PM | 10:45 PM |
| 8:00 PM | 11:45 PM |
| 9:00 PM | 12:45 AM (next day) |
| 10:00 PM | 1:45 AM (next day) |
| 11:00 PM | 2:45 AM (next day) |
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 ACST
Australian Central Standard Time (ACST) is UTC+9:30. It is used in Adelaide and Darwin in winter.
Australian Central Standard Time is UTC+9:30, half an hour behind the eastern states rather than a whole hour, which surprises people every time. South Australia moves to daylight saving in October and the Northern Territory does not, so Adelaide and Darwin share this offset for half the year and are an hour apart for the other half.
Does this gap change with the seasons?
Neither NPT nor ACST shifts with the seasons, so this 3.75-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 ACST?
9:00 AM NPT is 12:45 PM ACST.
Is ACST ahead of NPT?
ACST is 3 hours 45 minutes ahead of NPT.
Which time zone does this use?
NPT is UTC+5:45 and ACST is UTC+9:30. 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.