Outdoor Projects Calculators
Fence and deck board material lists for outdoor builds.
5 free tools — instant results, no sign-up.
Available calculators
Fence CalculatorPosts, pickets and rails for a wood fence.Deck Board CalculatorDecking boards for any deck size.Board Foot CalculatorBoard feet of lumber for any project.Fence Post CalculatorNumber of fence posts and post spacing.Stair CalculatorRisers, treads and stringer length for stairs.
Popular project use cases
- Building a wood privacy or picket fence
- Laying decking boards for a new deck
- Figuring lumber board feet for framing or shelving
- Building deck or porch stairs
Choosing the right calculator
- Fence Calculator gives posts, pickets and rails; Fence Post Calculator isolates the post count and spacing.
- Setting posts in concrete? Pair with the Post Hole Concrete Calculator for bag counts.
- Deck Board Calculator sizes decking; Board Foot Calculator sizes structural lumber.
- Building deck stairs? The Stair Calculator gives risers, treads and stringer length.
Good to know
Posts vs concrete: the Fence Post Calculator counts posts; the Post Hole Concrete Calculator sizes the concrete to set them.
Outdoor Projects FAQs
How far apart should fence posts be?
8 ft is standard for wood fences. Use 6 ft spacing in high-wind areas or for taller 8 ft fences to keep the rails strong.
How many deck boards do I need?
A 12×12 deck with 5.5 in boards, 1/8 in gaps and 12 ft boards needs about 27 boards with a 10% waste allowance. The Deck Board Calculator adjusts for any size.
Other categories
Concrete & MasonryConcrete volume, bag counts and pavers for slabs, footings and patios.LandscapingMulch, gravel, topsoil and sod for yards, beds and lawns.Interior ProjectsPaint, drywall, flooring and tile for indoor rooms and surfaces.Roofing & ExteriorShingle bundles and squares for roof replacements.MeasurementsSquare footage and area conversions — the starting point for every estimate.