Deck Stain Calculator

Figure out how much TWP stain you need for your deck, fence or siding.

Length (ft) Width (ft) Or total square feet Product TWP 100 Series - 2 coats wet on wet TWP 1500 Series - 1 coat TWP 200 Series - shakes / rough wood Extras Deck floor only Floor + railings & stairs (+20%) Lots of spindles / lattice (+35%)

Enter your deck size to see how many gallons you need.

Coverage rates we use

Product	Coverage	Coats
TWP 100	150-200 sq. ft./gal first coat, 200-300 second coat (about 125-150 sq. ft./gal for 2 coats)	2, wet on wet
TWP 1500	About 200 sq. ft./gal	1
TWP 200	100-200 sq. ft./gal on rough surfaces and fences; 100-250 on weathered shake roofs	1

Actual coverage varies with the type, age and texture of the wood and how it is applied. Rough, old or very dry wood soaks up more stain - it is better to have a little left over than to run short in the middle of a board.