Note Review Schedule Calculator
Spaced repetition schedules reviews at growing intervals so you revisit notes just before you would forget them. This calculator builds an expanding review schedule from a start date, a first interval in days, a growth factor, and the number of reviews you want. It lists each review date and the cumulative day offset, then shows the total span from start to final review. Use it to drop a simple, predictable review plan straight into your calendar.
Review schedule formula
interval(1) = first interval
interval(n) = interval(n - 1) * growth factor
offset(n) = offset(n - 1) + interval(n)
review date(n) = start date + offset(n) days
Each interval grows by the factor, and the cumulative offset is the running sum of the intervals. The review date is the start date plus that offset. The total span is the offset of the final review.
Worked example
Starting 19 June 2026 with a first interval of 1 day, a factor of 2, and 6 reviews: the intervals are 1, 2, 4, 8, 16, 32 days. The cumulative offsets are 1, 3, 7, 15, 31, 63 days, so the reviews fall on 20 and 22 June, 26 June, 4 July, 20 July, and 21 August 2026. The total span is 63 days.
Note review: frequently asked questions
What is spaced repetition?
Spaced repetition is a study method that schedules reviews at increasing intervals, so you revisit material just before you would forget it. Each successful review pushes the next one further out. It is more efficient than cramming because it concentrates effort at the moments that strengthen memory most.
How are the review intervals chosen?
This calculator uses an expanding schedule: the first interval is your chosen number of days, and each later interval multiplies the previous one by a growth factor. With a first interval of 1 day and a factor of 2, the gaps are 1, 2, 4, 8, 16 days, and so on. Both the first interval and the factor are editable.
How many reviews should I schedule?
It depends on how durable you need the memory to be. Five to seven expanding reviews is a common choice for moving material into long-term memory. The calculator lets you set the number of reviews and shows each date plus the total span from the first to the last review.
Does the schedule adapt to how well I recall?
No. This is a fixed expanding schedule, not an adaptive algorithm that reacts to your recall on each review. Adaptive systems lengthen or shorten the next interval based on performance. This tool gives a simple, predictable plan you can put straight into a calendar.
Sources and method
- Expanding-interval spaced repetition is a well-established study method; the first interval and growth factor here are editable inputs, not fixed claims.
- The schedule is direct date arithmetic on the inputs you choose, computed exactly by this tool.
Reviewed by the CalculatorHub team, edited by James Graham, 19 June 2026. See our methodology.