Paint Calculator
Enter room dimensions, surface type, and coats. Get exact gallon quantities with 5-gal pail breakdown—same math we use in the SiteScope app.
1 Room Dimensions
Enter each wall's length and height. Good for L-shaped rooms or walls with different ceiling heights.
2 Openings (deducted from paintable area)
Need custom door or window sizes, per-wall openings, or no deduction? Customize in SiteScope →
3 Surface & Paint Details
Rough surfaces absorb more paint, reducing effective coverage per gallon.
From product label. Typical: 350–400 sq ft/gal.
10% brush/roll · 15–20% spray
Leave blank to show gallons only.
4 Primer (optional)
PVA primer: ~250 sq ft/gal (penetrates more)
Primer is priced separately from finish paint.
Results
Rounded up to the nearest whole gallon. Order in 5-gal pails when possible — typically 10–15% cheaper per gallon.
These estimates use the same formulas as the SiteScope app. Actual quantities depend on wall conditions, installer technique, and product specifications. Always verify with your supplier before ordering.
SiteScope does this wall by wall—from a 3D scan.
Scan a room with your iPhone's LiDAR, assign materials to walls in the floor plan view, and SiteScope calculates quantities per wall with openings already deducted. Primer, coats, surface type, and coverage applied automatically per SKU. Export to CSV or PDF before you leave the site.
- Per-wall breakdown with finish + primer gallons separate
- Surface type and deep-base coats applied per SKU
- 5-gal pail breakdown and SKU-level totals in the takeoff tab
- Your cost, charge, and margin—applied to every line