M20 Concrete Calculator
This M20 concrete calculator batches M20 grade concrete — characteristic strength 20 MPa (≈ 2,900 psi) at 28 days — using its nominal 1:1.5:3 mix. Enter the volume you need and get cement bags, sand and aggregate.
Como usar esta calculadora
- Insira suas dimensões — pés para comprimentos, polegadas para a espessura.
- Ajuste as opções — porcentagem de desperdício, tamanho do saco e o preço local do concreto.
- Leia seus resultados — volume, sacos, peso e custo são atualizados ao vivo enquanto você digita.
A fórmula
M20 nominal mix = 1:1.5:3 (cement : sand : aggregate), dry volume factor 1.54 Exemplo resolvido: For 1 m³ of M20: 1.54 m³ dry material split 1:1.5:3 — the calculator returns exact cement bags, sand and aggregate volumes and masses.
M20 concrete is the workhorse residential grade — slabs, footings, driveways and beams in normal exposure. The "M" is for mix; the number is the characteristic cube strength in MPa at 28 days.
A concrete calculator m20 batch at the nominal 1:1.5:3 ratio consumes roughly 8 × 50 kg cement bags per cubic meter. M20 is the minimum grade most codes allow for reinforced concrete.
Nominal mixes are a site convenience, not a lab design: for structural work specified by an engineer, order a designed mix from a ready-mix plant and use this calculator for volume and cost checks.
Perguntas frequentes
Perguntas comuns sobre a m20 concrete calculator.
What does M20 mean?
Mix grade with characteristic compressive strength of 20 MPa (≈ 2,900 psi) at 28 days, tested on 150 mm cubes.
What is the ratio for M20 concrete?
The nominal mix is 1:1.5:3 (cement : sand : aggregate) by volume. Designed mixes achieving M20 vary by materials and admixtures.
Where is M20 used?
The workhorse residential grade — slabs, footings, driveways and beams in normal exposure.
How much cement per m³ of M20?
Enter 1 m³ above — the calculator returns the exact 50 kg bag count for the 1:1.5:3 nominal mix (roughly 8 bags).
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