Flashcard Interval Calculator
Use this calculator to estimate the next review interval in a spaced repetition system. Multiply the previous interval by an ease factor to plan your study schedule.
For study planning only; adjust based on personal progress.
Examples
- 4-day interval with 2.5 ease ⇒ 10 days
- 10-day interval with 1.5 ease ⇒ 15 days
FAQ
What is the ease factor?
A multiplier reflecting how well you remembered the material.
Can the ease factor be less than 1?
Yes, values below 1 shorten the next interval.
Should intervals be whole numbers?
They can include decimals; round as needed for your schedule.
Does this replace SRS software?
No, it's a simple aid for manual planning.
Additional Information
- Spaced repetition intervals typically expand after each successful review.
- Adjust the ease factor based on how confidently you remembered the card.