Valspar Paint Calculator
Work out how much Valspar paint you need. Enter your room size — the calculator is pre-filled with Valspar's typical coverage and a typical price (both editable in Advanced) and returns gallons, cans and estimated cost.
Pre-filled with Valspar's typical coverage (400 sq ft/gal) and a typical price. Adjust both in Advanced to match the exact line you're buying.
To estimate paint, multiply your wall area by the number of coats and divide by coverage (about 10 m² per litre). Enter your room below for the exact litres and number of cans.
Advanced — coverage & price
Buy whole cans rounded up. A little extra is normal — keep it for touch-ups.
Pick your paint colour →Pre-filled with each brand's typical coverage and price — pick yours, then fine-tune in Advanced.
Paint needed = paintable area × coats ÷ coverage, rounded up to whole cans. Paintable area is your wall area minus doors and windows (a door ≈ 21 sq ft, a window ≈ 15 sq ft). One US gallon covers about 350–400 sq ft per coat (1 litre ≈ 10–11 m²); primers and deep colors cover less, so add a coat. That's exactly what the calculator above does — it just measures and rounds for you.
Working by square feet? Skip the measuring and enter your area straight into the by-square-feet calculator.
Paint cost is your number of cans × price per can. As a guide, an average 12 × 15 ft room with 9 ft ceilings needs about 2 gallons for two coats — roughly $80–$160 in mid-range interior paint, or more for premium lines. Whole-house exteriors run higher because of the larger area and the need for exterior-grade paint. Set your real price per can in Advanced — coverage & price above and the estimate updates live. This covers paint only, not primer beyond one coat, tools or labor.
Type in the measurements for your room. The calculator works out the total area to paint.
Choose how many coats; adjust coverage in Advanced to match your paint can if needed.
We divide by the paint's coverage and round up to whole cans, with an estimated cost.
Our color tools run on our own catalogue of 26,000+ real paint colors across 16 brands — Benjamin Moore, Sherwin-Williams, Behr, Dulux, RAL and more — with the color math (HSL and CIELAB matching) computed in-house, not scraped from summaries. Every color you pick maps to a real, buyable paint with its code, so what you see here you can actually take to the store. We review and update these tools and their data regularly.
Created by Denis Kataev, founder of DSGN.HOUSE — a software engineer and digital entrepreneur building professional color-design tools for everyone.
How much paint do I need for a room?+
Enter the measurements for your room and the calculator works out the area, multiplies by your number of coats and divides by the paint's coverage, then rounds up to whole cans. One gallon covers about 400 sq ft per coat.
How much does it cost to paint a room?+
For an average 12 × 15 ft room you'll need about 2 gallons for two coats — roughly $80–$160 in mid-range paint. Cost equals cans × your price per can; set your real price in Advanced and the estimate updates live.
How many coats should I use?+
Two coats is standard for an even, durable finish. Set 1–3 coats, and add a primer coat for big color changes or bare surfaces.
What's the formula for how much paint I need?+
Paint needed = paintable area × coats ÷ coverage, rounded up to whole cans. Paintable area is wall area minus doors and windows. One gallon covers about 350–400 sq ft per coat.
I already know my square footage — can I use that?+
Yes — use the by-square-feet calculator and enter your area directly, no measuring needed.
Can I calculate in metres and litres?+
Yes — switch the units toggle to Metres / Litres and every field and result converts automatically.