Quick answer
Completion % = (actual hours ÷ planned hours) × 100 for a fixed scope.
Formula
- (hours spent ÷ hours budgeted) × 100
- Freeze budget before measuring
Introduction
Project managers and students both ask how much of the planned time is already used. That is a completion question expressed in hours.
Unlike task counts, time completion percentage stays in one unit: hours over hours.
Use the Time Percentage Calculator with a = spent and b = budget. Read time percentage examples for parallel numeric stories.
Overview
Task completion tracking with time uses hours logged on the task divided by hours estimated for the task.
Project progress percentage by time compares burn-down hours to remaining-plus-spent budget hours.
Goal completion analysis applies the same ratio to personal study or training caps.
Schedule tracking compares elapsed plan hours to total plan hours before a deadline.
Deadline monitoring uses the percent to trigger replanning when burn rate is too high.
Formula
- (hours spent ÷ hours budgeted) × 100
- Freeze budget before measuring
If budget = 24 h and spent = 18 h, completion = 75%. Remaining time is a separate subtraction problem.
Scope changes require rebaselining b. Comparing spent to an outdated budget misstates progress.
Contrast with percentage of time worked which uses schedules, not estimates.
Step-by-step
- Lock the scope and hour budget (b). Sprint estimate, module plan, or revision calendar.
- Sum hours spent (a) with consistent logging rules. Decide whether administrative time counts toward the same budget.
- Compute (a ÷ b) × 100. Treat >100% as over-budget signal, not success.
- Pair with remaining hours. Remaining = b − a when a ≤ b. Negative remaining means overrun.
- Rebaseline when scope changes. Update b and note the change in meeting minutes.
Worked example
18 spent, 24 budget → 75% of time budget used, 6 hours remain.
30 spent, 25 budget → 120% signals overrun.
Study: 5 spent, 20 weekly budget → 25% of weekly study plan consumed mid-week.