14 available tools
Construction Calculators
Calculate areas, volumes, and approximate building-material quantities with clear tools and configurable inputs.
Material quantities are estimates. Check products, specifications, project requirements, and applicable codes before purchasing or building.
Available tools
Square Footage Calculator
Calculate square footage for rooms, walls, floors, and other simple shapes, with automatic conversion between square meters and square feet.
Paint Calculator
Calculate how much paint you need from area, coats, coverage, and an optional waste allowance.
Brick Calculator
Estimate how many bricks you need from wall area, openings, brick size, mortar joint, and waste.
Tile Calculator
Calculate the tiles and boxes needed from total area, tile dimensions, and waste allowance.
Concrete Calculator
Calculate concrete volume for a slab with mixed units and an optional waste allowance.
Plaster and Render Calculator
Calculate render or plaster volume and split it with a configurable cement, lime, and sand ratio.
Concrete Block Calculator
Estimate concrete blocks for a wall from area, openings, modular dimensions, and waste.
Floor Screed Calculator
Calculate floor screed volume from area, thickness, and an optional allowance.
Concrete Mix Ratio Calculator
Split a mix volume among cement, sand, and gravel using a configurable ratio.
Drywall Calculator
Estimate the drywall sheets needed from the area, sheet dimensions, and waste allowance.
Roof Area Calculator
Calculate the approximate area of a simple roof from projected area and pitch.
Stair Calculator
Calculate basic straight-stair geometry: risers, treads, and horizontal run.
Slope Calculator
Convert slope among rise and run, percentage, and degrees without confusing 10% with 10°.
Gravel Calculator
Calculate gravel or stone volume and optionally estimate mass when density is known.
Showing 1–14 of 14 tools
Areas and finishes
Calculate area before estimating paint, tiles, render, bricks, blocks, or drywall sheets. Each tool accepts relevant product dimensions instead of imposing a universal size.
Waste allowances are configurable and may be set to zero. Discrete pieces round upward, while areas and volumes use practical precision.
Volumes, mixes, and geometry
Concrete, screed, and gravel calculators convert thicknesses and units correctly. The mix calculator distributes volume using the ratio entered by the user without presenting it as structural design.
Roof, stair, and slope tools solve basic geometry. They do not calculate strength, loads, or code compliance, which require appropriate project specifications and review.
Frequently asked questions
Are the results exact?
Geometry follows the entered data. Material quantities are estimates because pieces, joints, waste, technique, and products vary.
Can I use metric and imperial units?
Yes. Each tool offers relevant units and converts them internally.
Do these calculators design structures?
No. They assist with measurement, geometry, and quantity estimates; they do not size structural elements.