⏳ Binge-time calculator
How long to watch Ultra B?
- non-stop
- 20 h
- non-stop
- episodes
- 119
- episodes
- at 2 h a day
- 10 days
- at 2 h a day
At your pace
One episode a day
4 months
119 days
1 hour a day
3 weeks
20 days
2 hours a day
10 days
4 hours a day
5 days
Weekends only, 5 h a day
2 weekends
Faster ways through it
Watch at 1.5× speed
13h 13m
saves 6h 37m
Most players support it; dialogue stays clear.
Binge planner
119 episodes × 10 min = 19h 50m
How long to finish Ultra B? Set how much you watch per day.
10
days to finish
12
episodes per day
5
weekends if you double up
The whole franchise
Every main entry and movie in story order, recaps left out.
20h 10m
11 days at 2 h a day
- 1Ultra BTV Series19h 50m
- 2Ultra B: Black Hole kara no Dokusaisha BB!!Movie20m
How it compares
Longer than 17 of the 20 most popular series
- One Piece564 h
- Hunter x Hunter (2011)59 h
- Fullmetal Alchemist: Brotherhood25h 36m
- Ultra B19h 50m
- Death Note14h 11m
- Kimetsu no Yaiba10h 15m
- Attack on Titan10h
- Boku no Hero Academia 210h
- Boku no Hero Academia 310h
Show as table
| Item | Runtime |
|---|---|
| One Piece | 564 h |
| Hunter x Hunter (2011) | 59 h |
| Fullmetal Alchemist: Brotherhood | 25h 36m |
| Ultra B | 19h 50m |
| Death Note | 14h 11m |
| Kimetsu no Yaiba | 10h 15m |
| Attack on Titan | 10h |
| Boku no Hero Academia 2 | 10h |
| Boku no Hero Academia 3 | 10h |
Ultra B overview · Parents' guide · Longest and shortest anime
Frequently asked questions
How long does it take to watch Ultra B?
Ultra B takes about 19h 50m to watch: 119 episodes of 10 minutes. That's 20 hours non-stop, or 10 days at two hours a day.
How long does it take to watch all of Ultra B?
The core story plus movies across the franchise runs about 20h 10m over 1 main entries. The watch order page lists them in sequence.
Can I finish Ultra B in a weekend?
Yes. At ten hours across Saturday and Sunday you'd finish Ultra B in 2 weekends.