Spaced Repetition Rechner — Formel
## How Spaced Repetition Works
Spaced repetition increases review intervals over time as material is learned.
### Formula
**Next Interval = Initial Interval x Ease Factor ^ (Review Number - 1)**
The ease factor determines how quickly intervals grow. Standard is 2.5, meaning each interval is 2.5x the previous one.
### Typical Schedule
- Review 1: Day 1
- Review 2: Day 2–3
- Review 3: Day 6–7
- Review 4: Day 15–16
Spaced repetition increases review intervals over time as material is learned.
### Formula
**Next Interval = Initial Interval x Ease Factor ^ (Review Number - 1)**
The ease factor determines how quickly intervals grow. Standard is 2.5, meaning each interval is 2.5x the previous one.
### Typical Schedule
- Review 1: Day 1
- Review 2: Day 2–3
- Review 3: Day 6–7
- Review 4: Day 15–16
Lösungsbeispiel
Starting with a 1-day interval and ease factor 2.5, calculating the 4th review.
- Next interval = round(1 x 2.5^3) = round(15.625) = 16 days
- Review 1: 1 day, Review 2: 2.5 days, Review 3: 6.25 days, Review 4: 15.6 days
- Total days elapsed ≈ round(1 x (2.5^4 - 1) / 1.5) = round(25.4) = 25 days