Burndown Chart Calculator
Calculate agile sprint ideal vs actual burndown rate, remaining story points per day, projected completion day, and scope creep impact.
Agile Burndown Chart Metrics
A burndown chart is a graphical representation of work remaining versus time in an agile sprint. It helps Scrum teams track velocity, identify bottlenecks early, and forecast whether sprint commitments will be completed on schedule.
Burndown Calculations
Key formulas used in sprint burndown analysis:
- Ideal Velocity: Total Scope / Total Sprint Days
- Actual Velocity: Completed Story Points / Elapsed Sprint Days
- Required Velocity: Remaining Story Points / Remaining Sprint Days
- Projected Finish Day: Elapsed Days + (Remaining Story Points / Actual Velocity)
Impact of Scope Creep
Adding new user stories mid-sprint increases total commitment scope. Scope creep shifts the ideal burndown line upward and increases the required daily velocity needed for on-time completion.
Frequently Asked Questions
What does an upward spike in a burndown chart mean?
An upward spike indicates scope creep (new tasks added to the sprint) or re-estimation of remaining work upward.
What is the difference between a burndown and a burnup chart?
A burndown chart shows work remaining decreasing down to zero, while a burnup chart tracks total completed work increasing toward total scope over time.
How often should sprint burndown be updated?
Sprint burndown metrics should be updated daily, typically right before or during the daily Scrum standup.
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