This calculator estimates labor-hours and approximate crew duration for an interior painting project from paintable area, worker productivity, crew size, and setup/cleanup time. It is intended for planning work effort rather than estimating paint quantity or project price.
By separating total worker effort from elapsed crew time, the calculator makes it easier to compare staffing scenarios. For example, a two-person crew may shorten the schedule while total labor-hours remain similar. The productivity rate should represent the complete painting workflow you intend to measure—such as rolling and cutting-in only, or a broader scope that also includes routine preparation. Detailed repairs, furniture moving, masking complexity, multiple colors, high ceilings, and access constraints can materially change real labor requirements.
1. Enter paintable area
Use the surface area covered by the labor scope you are estimating.
2. Set productivity
Enter square feet completed per worker-hour for the same scope.
3. Choose crew size
Enter the number of painters working concurrently.
4. Add setup and cleanup
Include elapsed time for daily or project-level staging and cleanup as appropriate.
5. Compare effort and duration
Use labor-hours for cost planning and crew duration for scheduling.
Productivity is square feet per worker-hour and should be measured consistently with the entered area.
The main result is combined worker time, while the crew-duration statistic estimates elapsed working time.
Extensive preparation, trim detail, room contents, access, drying intervals, and color changes may require additional time.
Given: 1,800 sq ft, productivity of 120 sq ft per worker-hour, a 2-person crew, and 3 setup/cleanup hours.
Calculation: Production labor = 1,800 ÷ 120 = 15 hours. Setup labor = 3 × 2 = 6 hours. Total labor = 21 labor-hours. Crew duration = 15 ÷ 2 + 3 = 10.5 hours.
Result: About 21 labor-hours and 10.5 elapsed crew-hours.
This provides a baseline before adding unusual prep or access work.
Routine prep can be embedded in the productivity rate if that is how you measured it. Large repairs or special masking are often clearer as separate labor additions.
Not directly. If your productivity rate is per completed project area including all planned coats, enter the area once. If the rate is per coat, use total coated area instead.
The mathematical model assumes work divides evenly, but real rooms can limit how many people work efficiently at once. Coordination and task dependencies can reduce scaling.
Only if you can express those tasks with a meaningful area-based productivity rate. Detailed trim and doors are often better estimated with unit-based or separate time allowances.
Multiply total labor-hours by your chosen hourly labor cost. Use a fully burdened rate if you want payroll-related costs included.