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Concrete Mix Calculator

M10–M40 · Nepal standard nominal mix ratios

Results — 1m³ of M20

Cement

≈ 13 kg

0.25 bags

Fine Sand

Zone II fine aggregate

0.52 m³

20mm Aggregate

Coarse aggregate

1.05 m³

Water

w/c ratio ≈ 0.45

6 litres

⚠️

Important: Nominal mix ratios only. For M25+ structural work, use design mix per IS 10262. Dry factor = 1.54. Add 5–7% wastage. Consult an NEC-registered structural engineer for NBC 105:2020 compliance.

Typical Use: RCC beams, slabs, columns — standard

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