How much cement is needed for one cubic meter of concrete?

For C25 grade, each cubic meter of concrete requires approximately 300-350kg of cement, 600-700kg of sand, 1100-1200kg of gravel, and 150-170kg of water. Actual quantities depend on the mix design; laboratory mix ratios should take precedence.

🧱 Concrete Calculator

Calculate pour volume and cement, sand, gravel quantities

Length (m)

Width (m)

Depth (m)

e.g., 15cm → enter 0.15

Concrete Grade

Waste Rate (%)

Typically 3-5%

Concrete Volume

2.36 m³

Net volume 2.25 m³ · incl. 5% waste

Material Quantities (C25 Mix Ratio 1 : 2.05 : 3.82)

Cement

827 kg

Approx. 17 bags (50kg/bag)

Sand

1695 kg

Approx. 1.1 m³

Gravel

3159 kg

Approx. 2.0 m³

Water

397 kg

Approx. 0.40 t

Common Grade Reference

Grade	Usage	Mix (Cement:Sand:Gravel)
C15	Bedding, Foundation	1 : 3.28 : 5.68
C20	Flooring, Pavement	1 : 2.52 : 4.56
C25	Beams, Slabs, Columns	1 : 2.05 : 3.82
C30	Structural Members	1 : 1.72 : 3.32
C35	High-rise Structures	1 : 1.48 : 2.92
C40	Prestressed Members	1 : 1.28 : 2.58

* Mix ratios are by mass; actual construction should follow laboratory mix designs

Concrete Calculator Guide

This calculator helps you determine the volume of concrete needed for a pour. Enter length, width, and thickness to calculate the required concrete volume and estimated material quantities.

A typical concrete mix ratio is 1:2:3 (cement:sand:gravel by volume), but actual mix design should follow engineering specifications.

Concrete Quantity Calculation

Formula: Volume = Length × Width × Thickness

Material estimate (C30 concrete, per cubic meter): - Cement: ~400kg - Sand: ~600kg - Gravel: ~1,200kg - Water: ~180kg

Common pour thicknesses: - Floor slab: 10-15cm - Foundation: 30-50cm - Driveway: 10-15cm - Road: 20-25cm

Note: Add 5%-10% for waste in actual quantities.

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