Free construction calculators
Instant material estimates for concrete, tiles, bricks, rebar and more. Metric and imperial, no sign-up needed.
Most used
Concrete calculator
Volume for slabs, walls, columns and footings
LengthWidthDepthWaste %
3.0m³5×4×0.15m
Concrete bag calculator
40lb, 60lb, 80lb bag count for any pour
LengthWidthDepth
45bags80lb @ 10×10ft
Tile calculator
Tile count, box quantity and grout joints
Room sizeTile sizeGrout
112tiles4×3m, 60×60cm
Brick calculator
Bricks and pallets for walls and partitions
LengthHeightWaste %
1,320bricks8×2.5m wall
Paint calculator
Litres and tin count for walls and ceilings
Room sizeCoatsCoverage
9litres5×4m, 2 coats
Rebar calculator
Steel bar weight by diameter and length
DiameterLengthCount
74.4kg13mm × 6m × 20
Excavation calculator
Pit, trench and sloped-side cut volume
LengthWidthDepthWaste %
22.5m³5×3×1.5m
Mortar calculator
Cement bags, sand and water for brickwork
LengthHeightMix ratioWaste %
8bags5×2m, 1:5 mix
Unit converter
Length, area, volume and weight conversions
m ↔ ftm² ↔ ft²m³ ↔ yd³평
3.281ft1 m =