Construction Calculators
Material takeoff and cost estimates for concrete, brick, rebar, paint, tiling, roofing and more — metric and imperial.
Estimate concrete volume and the number of bags needed for slabs, footings, columns and walls.
Find how many bricks you need for a wall, including openings, plus mortar estimate.
Estimate rebar quantity, total length and weight for slabs, footings and walls.
Estimate gravel, crushed stone or topsoil by area and depth. Tons and cubic yards/meters.
Estimate soil removal volume for trenches, basements and foundations, including swell/shrink.
Estimate roof area in 'squares' and how many bundles of shingles you need.
Estimate tons of hot-mix asphalt for driveways and parking lots.
Find the weight of steel bars, plates, pipes and angles.
Estimate gallons or liters of paint needed for a room, including multiple coats.
Estimate plaster/rendering material volume and bags for walls and ceilings.
Estimate CMU blocks for a wall with mortar joints, openings and wastage.
Estimate concrete and excavation for strip and raft foundations.
Find how many pavers you need for a patio with the joining gap and edge wastage.
Estimate drywall sheets for walls and ceilings with stud and screw counts.
Estimate rooms of flooring material plus wastage for any plank or tile size.
Compute board feet of lumber for any board size and count.
Estimate fence posts, rails, panels and length for a wood or metal fence.
Estimate total project material cost with quantities, units and wastage.
Estimate drop-ceiling grid tiles, panels and cross tees for a room.
Estimate wallpaper rolls for a room by wall area, roll coverage and pattern repeat.
About construction calculators
Estimate the right amount of material before you buy. Each calculator uses standard industry formulas, supports metric and imperial units, and shows the working so you can verify every number.
Frequently asked questions
Are these estimates professionally accurate?
They use standard industry formulas and let you tune density, coverage, wastage and pricing. Final quantities should be verified by your supplier or engineer.
Can I use metric and imperial together?
Yes. Every construction calculator lets you pick metric or imperial units for each dimension.
Do you account for wastage?
Yes, a default wastage percentage (often 5–10%) is applied per material, and you can adjust it.