Wood Finish Coverage Calculator
Avoid running out of finish mid-project by estimating exactly how much stain, oil, or polyurethane you need for your surface area and number of coats.
Estimated Cost
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Total Area-Coats (sq ft)—
Raw Gallons Needed—
Gallons to Buy (rounded up)—
Total Cost—
About this calculator
Estimate how much stain, oil, or polyurethane finish you need based on surface area, number of coats, and product coverage rate.
Frequently Asked Questions
How many coats of finish should I apply?
Most projects use 2-3 coats of polyurethane or oil finish, though open-grain woods or high-wear surfaces may need more.
Does coverage rate vary by finish type?
Yes, thinner finishes like Danish oil or wiping varnish cover more area per coat than thick brush-on polyurethane.
Should I round up my gallon purchase?
Yes, buying slightly extra avoids mid-project shortages and color/batch mismatches, especially with stains.