One page of repaint math: wall sqft formulas, gallon counts, labor, a room quick table, and the pricing formula that protects your margin.
One page, letter size. Print it, keep it in the truck. No email required.
Perimeter times ceiling height, minus about 15 sqft per window and 20 per door. A worked example so the formula sticks.
Wall sqft times coats divided by 350. When to round up, when a 5-gal bucket beats singles, and when dark-to-light means an extra coat.
Day rate times days times painters, with realistic crew-hour ranges that count prep, masking, and cutting in.
Wall sqft, gallons, and crew-hours for 10x10 through 15x20 rooms at a glance. The numbers you reach for mid-walkthrough.
Materials, labor, overhead, and margin priced end to end, from raw sqft to the number you say out loud.
Materials plus labor, times overhead, times margin. The line that keeps insurance, the truck, and fuel from eating your profit.
Want the math done for you? The free painting estimator calculates sqft, gallons, and labor from your room dimensions. For the full method, read how to price interior painting. Sending the number to a client? Pair it with the free estimate template. Want the whole method start to finish? Read how to price a repaint.
Straight off the sheet: 8 ft ceilings, one door and one window deducted, walls at two coats. Crew-hours include prep, masking, and cutting in.
| Room | Wall sqft | Gallons (2 coats) | Crew-hours |
|---|---|---|---|
| 10 x 10 | ~285 | 2 | 4-5 |
| 12 x 12 | ~349 | 2 | 5-6 |
| 12 x 14 | ~381 | 3 | 5-7 |
| 15 x 20 | ~525 | 3 | 7-9 |
Gallons = wall sqft x coats / 350, rounded up. The PDF adds the formulas, a worked 3-room example, and the margin math.
The cheat sheet is the manual version of what Rollr does on-site: walk the rooms, punch in dimensions, and send a clean, branded PDF quote before you leave the driveway.
The full method: measure, materials, labor, overhead, margin, walk-away.
Enter wall sqft and coats, get gallons rounded to real bucket sizes.
A clean repaint quote layout you can copy. PDF download, no signup.