CATEGORY9 tools
Home & DIY
Calculators for home improvement, construction materials, electronics, and maker projects.
AvailableLocal
3D Printing Cost Calculator
Calculate true 3D printing costs and sale prices including filament, energy, and labor.
AvailableLocalBattery Runtime Calculator
Estimate how long a battery will last.
AvailableLocalConcrete Volume Calculator
Slab, beam, column, or footing, in m³, liters, or bags.
AvailableLocalDeck Materials Calculator
Estimate decking, framing lengths, and fasteners.
AvailableLocalFlooring / Tile Calculator
Calculate tiles and boxes needed for a floor.
AvailableLocalPaint Coverage Calculator
Estimate liters, cans, and cost for painting.
AvailableLocalRoof Pitch Calculator
Convert roof slope and estimate rafters and surface area.
AvailableLocalSolar PV Calculator
Size a solar panel system.
AvailableLocalVoltage Drop Calculator
Calculate voltage drop in a cable run.