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Free calculators for concrete, decks, pools, solar, and HVAC — each one gives you a drawing and a material list you can print.

Popular: Concrete slab · Stair stringer · Mulch · BTU sizing

Plan a whole project

DeckFraming, footings and stairs — with the permit question answered.Peak: May–August Paver patioPavers, base and the excavation nobody budgets for.Peak: April–August FencePosts, concrete and the setback rules that are not in the code.Peak: May–September

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Concrete & MasonrySlab · Footing · Rebar Aggregates & LandscapingGravel · Mulch · Topsoil Framing & CarpentryStair stringer · Lumber · Span Interior FinishingPaint · Drywall · Tile Roofing & ExteriorShingles · Siding · Gutters Pool & SpaVolume · Salt · Heater Solar & EVPanel count · Battery · EV charge Homestead & OutdoorFence · Raised bed · Firewood ElectricalWire gauge · Load · Conduit HVACBTU · Duct · Mini-split Quick ConvertersFeet-inches · Area · Volume All 138 calculators →

Concrete & Masonry Aggregates & Landscaping Framing & Carpentry Pool & Spa Solar & EV All 11 trades · 138 calculators →

Most used this week

Concrete slabYards, bags, and rebar for any pad Stair stringerRiser height, cut angles, layout MulchCubic yards and bag count for any bed Paver baseGravel and sand depth by the square foot BTU sizingRight-size an AC or mini-split by room Pool volumeGallons for any shape, plus chemical doses

The formula is printed on every page — check our math.

Print-ready cut sheets and material lists on every tool.

Free, no account, works on your phone at the store.