Tokyo to Casper time converter

Casper is 15 hours behind Tokyo. When it is 9:00 AM in Tokyo, it is 6:00 PM (Fri, Oct 16) in Casper.

Tokyo JST

Saturday, October 17, 2026

Casper MDT

Saturday, October 17, 2026

Tokyo
Japan
Sat, Oct 17
JSTUTC+9
Casper
Wyoming, United States
Sat, Oct 17
MDTUTC-6-15h
Finding your time zone…
Shared working hours (9:00–18:00)

Tokyo to Casper conversion table

Every hour of today in Tokyo and the matching time in Casper. Light rows are typical working hours (9:00–18:00).

TokyoCasper
12:00 AM9:00 AM−1 day
1:00 AM10:00 AM−1 day
2:00 AM11:00 AM−1 day
3:00 AM12:00 PM−1 day
4:00 AM1:00 PM−1 day
5:00 AM2:00 PM−1 day
6:00 AM3:00 PM−1 day
7:00 AM4:00 PM−1 day
8:00 AM5:00 PM−1 day
9:00 AM6:00 PM−1 day
10:00 AM7:00 PM−1 day
11:00 AM8:00 PM−1 day
12:00 PM9:00 PM−1 day
1:00 PM10:00 PM−1 day
2:00 PM11:00 PM−1 day
3:00 PM12:00 AM
4:00 PM1:00 AM
5:00 PM2:00 AM
6:00 PM3:00 AM
7:00 PM4:00 AM
8:00 PM5:00 AM
9:00 PM6:00 AM
10:00 PM7:00 AM
11:00 PM8:00 AM

Best time to call or meet

Working hours don't overlap fully. The closest fit is 7:00 AM – 9:00 AM in Tokyo (4:00 PM – 6:00 PM in Casper): working hours on one side, early or late on the other.

Daylight saving time and the difference

The difference changes during the year because Tokyo and Casper switch clocks on different dates:

  • Oct 17, 2026 – Nov 1, 2026: -15h
  • Nov 1, 2026 – Mar 14, 2027: -16h
  • Mar 14, 2027 – Oct 17, 2027: -15h

Distance

Tokyo and Casper are 9,017 km (5,603 miles) apart in a straight line.

More conversions

Casper to TokyoTokyo to New YorkTokyo to LondonTokyo to Los AngelesTokyo to ChicagoTokyo to TorontoTokyo to São PauloTokyo to ParisTokyo to BerlinTokyo to MoscowTokyo to DubaiTokyo to New DelhiTokyo to Bangkok
New York to CasperLondon to CasperLos Angeles to CasperChicago to CasperToronto to CasperSão Paulo to CasperParis to CasperBerlin to CasperMoscow to CasperDubai to CasperNew Delhi to CasperBangkok to Casper

Questions and answers

What is the time difference between Tokyo and Casper?

Casper is 15 hours behind Tokyo.

What time is it in Casper when it is 9 AM in Tokyo?

When it is 9:00 AM in Tokyo, it is 6:00 PM (Fri, Oct 16) in Casper.

When is the best time to call Casper from Tokyo?

Working hours don't overlap fully. The closest fit is 7:00 AM – 9:00 AM in Tokyo (4:00 PM – 6:00 PM in Casper): working hours on one side, early or late on the other.

Does the time difference between Tokyo and Casper change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.