How to use this calculator
- Enter gross exterior wall area.
- Subtract the estimated share occupied by openings.
- Set coats and observed crew productivity.
- Add prep labor, then choose crew size and workday length.
#3001 · Lifestyle & Home Tool
Exterior Painting Labor Hours Calculator
Estimate the hands-on time needed to paint a home exterior before scheduling a crew or comparing bids. The calculator adjusts wall area for doors and windows, multiplies it by the number of coats, and adds preparation time. Results show total labor-hours, expected crew-hours, and workdays so you can separate the amount of work from the calendar time.
Calculator
Project assumptionsFormula
Labor-hours = (gross area × (1 − openings %) × coats ÷ productivity) + prep hours
What the result means
Labor-hours measure the total worker effort. Crew-hours and workdays estimate elapsed time only when all crew members can work productively at the same time.
Weather, ladder moves, siding condition, and detailed trim can reduce real-world productivity. Use a conservative productivity rate when access is difficult.
Example calculation
For 2,400 sq ft of walls with 15% openings, two coats, 150 sq ft per labor-hour, and 16 prep hours: net area is 2,040 sq ft and total labor is 43.2 hours. A three-person crew needs about 14.4 crew-hours, or 1.8 eight-hour days.
Tips for better results
- Measure each wall face separately before adding totals.
- Do not subtract trim if it will also be painted.
- Lower productivity for multi-story walls or complex siding.
- Keep prep hours separate so repairs are visible in the estimate.
- Compare total labor-hours—not only crew days—across bids.
Frequently asked questions
Should I include primer as a coat?
Include primer when its application takes roughly the same effort as a finish coat; otherwise add its time to preparation labor.
How do windows affect exterior painting labor?
The openings percentage removes unpainted area, but detailed masking may still require additional preparation hours.
Why are labor-hours different from crew-hours?
Labor-hours add every worker's time, while crew-hours divide that effort across the crew to estimate elapsed time.
What productivity rate should I use for textured siding?
Use your crew's observed rate; textured or damaged siding generally requires a lower input than broad, smooth surfaces.
Does the estimate include drying time?
No. Drying and weather delays affect the schedule but are not active labor-hours.
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Inputs and assumptions
| Variable | Meaning |
|---|---|
| Gross wall area | Exterior wall faces before deductions |
| Openings | Unpainted door and window share |
| Productivity | Square feet completed per labor-hour per coat |
| Prep labor | Separate cleaning, masking, and repair time |