Work out stone masonry volume instantly with clear inputs, formula shown and shareable results.
Random rubble stonework needs far more mortar than brickwork because the units are irregular: 20-30 percent of the wall volume is typical, against 15-20 percent for brick. Subtracting the mortar share gives net stone volume, which at about 2.6 tonnes per cubic metre converts to the tonnage to order.
Masonry volume
V = length x height x thickness
Split
Mortar = V x mortar share; stone = V - mortar; stone tonnes = stone m³ x 2.6
V = length x height x thickness. Random rubble stonework needs far more mortar than brickwork because the units are irregular: 20-30 percent of the wall volume is typical, against 15-20 percent for brick.
Dressed and coursed stone beds more closely, so the joints are thinner and the void fraction lower. Random rubble has large irregular gaps that all have to be filled.
This calculator takes 4 inputs: Wall length, Wall height, Wall thickness, Mortar share of volume. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.