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Sand Screed Calculator

Calculate coarse sharp sand and cement for floor screeding, underfloor heating leveling, and bonded screeds.

Floor Screed Materials

Real-Time
Sharp Sand Volume
0.00 m³
0 tons sharp sand
Cement Bags (50 kg)
0 Bags
0 kg cement
Total Wet Volume
0.00 m³
0 CFT
1-Ton Bulk Bags
0 Bags
Sharp sand jumbo bags
Visual Engineering

Floor Screeding & Underfloor Heating Rails

Sharp sand and cement screed leveled with a straightedge bar over heating pipe loops.

SCREED BAR 50-75MM SHARP SAND SCREED SCREED MATHEMATICS • Screed Vol = Floor Area × Thick • Mix Ratio: 1:3 to 1:4.5 Sharp Sand • Dry Factor: 1.25 × Wet Vol • Min Cover above pipe: 25mm

Floor Screeding & Underfloor Heating Rails

Sharp sand and cement screed leveled with a straightedge bar over heating pipe loops.

Mathematical Theory

Engineering Calculations & Formulas

Mathematical formulas and engineering constants powering this calculator.

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Floor Screed Volume

Calculates exact screed volume from floor area and screed thickness.

Screed m³ = Floor Area (m²) × (Thickness mm / 1000)
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Sharp Sand Requirement

Proportions coarse sharp sand using 1:4 screed mix ratio.

Sharp Sand m³ = Screed m³ × 1.25 × (4 / 5)
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Cement Bags in Screed

Calculates 25kg / 50kg cement bags needed for the screed floor.

Cement Bags (25kg) = ⌈ (Cement m³ × 1440 kg/m³) / 25 ⌉