Education for DIYers
Learn how much paint you need — and how to apply it well
Start with the calculation, then get the tools and techniques that make the job look right the first time.
How to Calculate Paint
Step-by-step formula: wall area, doors, windows, coats, and coverage rates.
Paint Coverage Rates
Sq ft per gallon by paint type — the numbers our calculators use.
Tools You Need to Paint
Rollers, brushes, tape, drop cloths, and what is optional vs essential.
Painting Techniques
Prep, cutting in, rolling, coats, and drying times for a pro-looking finish.
Paint Types & Finishes
Flat, eggshell, satin, semi-gloss — where each finish works best.
Paint Calculator FAQ
Common questions about gallons, coats, ceilings, and coverage.
Ready to get your gallon count?
Use the free calculator, then optionally email yourself an advanced recommendation with product options.
Open Quick Calculator