Burndown Chart Calculator

Written by Great Medico

Updated September 25, 2026 •2 min read

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When a business metric is discussed in percentages, ratios, or “per unit” terms, the arithmetic can hide the practical meaning. Burndown Chart Calculator keeps that calculation visible and easy to audit.

What this calculator does

Burndown Chart Calculator summarizes completed versus remaining work, average delivery velocity, and the projected time needed to finish the remaining work. The result is deliberately tied to the fields on this page, so it represents this calculator’s model rather than a broader financial analysis with unentered assumptions.

How to use it

Enter Total planned work points, Remaining work points, Days elapsed, and Sprint or project length (days). Use figures from the same reporting period and the same accounting, workforce, inventory, or campaign definition wherever possible. Before using the result in a decision, recheck unusually large or negative values against the source data rather than assuming the calculator is correcting an inconsistent input.

How the calculation works

Completed work = total planned work − remaining work. Average velocity = completed work ÷ elapsed days. Projected days to finish = remaining work ÷ average velocity, while the ideal remaining amount follows a straight-line plan from total work at day zero to zero at the project end.

Example

From 200 planned points with 120 remaining after 8 days, 80 points are complete. Average velocity is 10 points/day, projected remaining time is 12 days, and straight-line ideal remaining work is about 85.7.

How to interpret the result

Use the result as a compact description of the inputs you supplied. Compare it with the same metric calculated consistently over time or across alternatives; the number is most useful when its accounting period, denominator, and business definition remain stable.

Limitations and notes

The calculation is only as consistent as its inputs. Accounting policy, attribution rules, period length, one-time items, seasonality, and local reporting conventions can change what should be included in a numerator or denominator. Use the same definitions when comparing periods, and do not treat a simplified ratio as a complete operational diagnosis.