Free Construction Calculators
Material estimates for paint, drywall, gravel, concrete, tile, and fencing.
- Volume and coverage estimators
- Stairs, roof pitch, and insulation helpers
- Imperial/metric friendly inputs where supported
11 tools in this category
Unit Converter
Convert length, weight, area, and volume units
OpenConcrete Volume
For a slab
OpenTile Calculator
Number of tiles needed
OpenBoard Feet
Lumber volume
OpenRoof Pitch
Pitch and angle
OpenInsulation Thickness
From R-value
OpenStair Calculator
Number of steps
OpenPaint Coverage Calculator
Gallons or liters of paint needed for a room
OpenDrywall Calculator
Number of 4×8 sheets for walls and ceiling
OpenGravel / Aggregate Calculator
Tons and cubic yards of gravel for a pad or path
OpenFence Post Calculator
Posts, rails, and panels for a straight fence run
OpenLooking for something else? Browse all tools or explore curated hubs.