Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Paint Calculator (Gallons for a Room)

Calculate how many US gallons of paint you need for a room. Uses the standard 350 sq ft/gallon coverage rate common on US paint cans, adjusted for number of coats.

Total wall area (sq ft)

Number of coats (coats)

Coverage per gallon (sq ft/gal)

Fill in the required fields to see your result.

Construction

Paint Coverage Calculator

Calculate how many litres of paint you need for a job, given the area to cover, the number of coats, and the spread rate of your specific paint. Lets you order the right amount without overspending on excess or running short mid-coat.

Total Surface Area (m²)

Number of Coats (coats)

Paint Coverage per Liter (m²/L)

Fill in the required fields to see your result.

Key differences

	Paint Calculator (Gallons for a Room)	Paint Coverage Calculator
Category	Construction	Construction
Inputs required	3	3
Result	Gallons needed (gal)	Paint Required (liters)
What it does	Calculate how many US gallons of paint you need for a room. Uses the standard 350 sq ft/gallon coverage rate common on US paint cans, adjusted for number of coats.	Calculate how many litres of paint you need for a job, given the area to cover, the number of coats, and the spread rate of your specific paint. Lets you order the right amount without overspending on excess or running short mid-coat.