Sprint Capacity Calculator
Work out how much a sprint can absorb given team size and availability.
About Sprint Capacity Calculator
Rated capacity is a ceiling, not a design point, so it is derated by the headroom percentage before dividing. The result is rounded up because you cannot deploy a fraction of a developer. Sizing to rated capacity leaves nothing for peaks or failures; the spare-capacity line shows whether the rounded-up count actually buys useful sprint capacity.
Formula
Sprint Capacity
Units = ⌈demand ÷ (capacity per unit × (1 − headroom))⌉
- Story points requested for the sprint
- Total load to be served
- Story points per developer
- Rated capacity of a single developer
Worked example
With the default values below, Sprint Capacity Calculator returns Developers Required of 10. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Story points requested for the sprintminimum 0
- 120
- Story points per developerminimum 0
- 16
- Headroom reserved for peaksaccepts 0–100 %
- 20 %
Results
- Developers Required
- 10
- Exact Requirement Before Rounding
- 9.375
- Usable Capacity per Developer
- 12.800
- Spare Capacity at That Count
- 6.3%
- Total Usable Capacity Provisioned
- 128.00
Step by step
- 1Values used
- 2Sprint Capacity
- 3Developers Required= 10
- 4Exact Requirement Before Rounding= 9.375
- 5Usable Capacity per Developer= 12.800
- 6Spare Capacity at That Count= 6.3
- 7Total Usable Capacity Provisioned= 128.00
Assumptions and limits
- The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Frequently Asked Questions
How is Sprint Capacity calculated?
Units = ⌈demand ÷ (capacity per unit × (1 − headroom))⌉ Rated capacity is a ceiling, not a design point, so it is derated by the headroom percentage before dividing. The result is rounded up because you cannot deploy a fraction of a developer.
Why does Sprint Capacity matter?
Sizing to rated capacity leaves nothing for peaks or failures; the spare-capacity line shows whether the rounded-up count actually buys useful sprint capacity.
What values do I need to enter?
This calculator takes 3 inputs: Story points requested for the sprint, Story points per developer, Headroom reserved for peaks. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.