What is the time difference between NPT and IRST?

Iran Standard Time (IRST) is 2 hours and 15 minutes behind Nepal Time (NPT). NPT uses a UTC offset of UTC+5:45, while IRST uses UTC+3:30. For example, when it's 9:00 AM in NPT, it's 6:45 AM in IRST. This difference remains constant year-round since neither timezone observes daylight saving time. Use the conversion table above to see the exact time for each hour of the day.

How do I convert NPT to IRST?

To convert NPT to IRST, subtract 2 hours and 15 minutes from the NPT time. For example, 9:00 AM NPT is 6:45 AM IRST, and 5:00 PM NPT is 2:45 PM IRST. Since neither timezone observes DST, this conversion stays the same all year. You can also use the interactive converter above for quick, accurate results.

What time is it in IRST when it's noon in NPT?

When it's 12:00 PM (noon) in NPT, it's 9:45 AM in IRST. This is because IRST is 2 hours and 15 minutes behind NPT. Similarly, when it's 6:00 PM in NPT, it's 3:45 PM in IRST. This relationship is constant throughout the year. The color-coded conversion table above shows every hour mapped between both timezones.

How many hours behind is IRST from NPT?

IRST is 2 hours and 15 minutes behind NPT. This means when it's 9:00 AM in NPT, it's 6:45 AM in IRST, and when it's midnight in NPT, it's 9:45 PM in IRST. This offset is constant throughout the year since neither timezone uses daylight saving time. The conversion table above provides a complete hour-by-hour mapping.

Is IRST ahead or behind NPT?

IRST is behind NPT by 2 hours and 15 minutes. Clocks in IRST show an earlier time than NPT, meaning the day starts later in IRST relative to NPT. For example, when it's noon in NPT, it's still 9:45 AM in IRST. This difference stays the same year-round.

Does NPT observe daylight saving time?

No, Nepal Time does not observe daylight saving time. The UTC offset of UTC+5:45 remains the same year-round, which simplifies time conversions. Regions using NPT keep their clocks unchanged regardless of the season.

Does IRST observe daylight saving time?

No, Iran Standard Time does not observe daylight saving time. The UTC offset of UTC+3:30 remains the same year-round, which simplifies time conversions. Regions using IRST keep their clocks unchanged regardless of the season.

What is the best time to call from NPT to IRST?

The best time for a call between NPT and IRST is during overlapping business hours (9 AM – 5 PM) in both timezones. To reach someone in IRST during their work day, call between 11:15 AM and 7:15 PM your NPT time. Avoid calling too early or late, as the 2 hours and 15 minutes difference means your evening could be their early morning. Check the color-coded conversion table above — green hours indicate business hours in both zones, making it easy to find the ideal time.

Do NPT and IRST ever have the same time?

No, NPT and IRST are always 2 hours and 15 minutes apart and never display the same clock time simultaneously. Neither timezone observes DST, so the difference is constant year-round with no seasonal variation. The 2 hours and 15 minutes offset is determined by their fixed positions relative to the Prime Meridian (UTC). You can always rely on this consistent difference when planning across these timezones.

NPT to IRST Converter

Convert Nepal Time to Iran Standard Time. See the hour-by-hour conversion table below.

Timezone Details

Kathmandu

7:06 AM

Friday, April 3, 2026

Kathmandu (UTC+05:45)

Tehran

4:51 AM

Friday, April 3, 2026

Tehran (UTC+03:30)

Difference: -2h 15m

24-Hour Overview

Kathmandu — 24-hour overview

12a12a

3a3a

6a6a

9a9a

10a

11a

12p12p

3p3p

6p6p

9p9p

10p

11p

NightMorningBusinessEvening

Tehran — 24-hour overview

9p9p

10p

11p

12a12a

3a3a

6a6a

9a9a

10a

11a

12p12p

3p3p

6p6p

NightMorningBusinessEvening

Frequently Asked Questions

Related Conversions

IRST to NPT

Cities in These Timezones

NPT Cities

Kathmandu

IRST Cities

Tehran

More Tools

Compare NPT & IRST Plan a Meeting (NPT & IRST)See on Map

Learn More

How Time Zones Work Understanding DST Timezone Abbreviations

External Resources

IANA Time Zone Database