Cement Sand Aggregate Calculator

If you already know the concrete volume, this calculator splits it into cement, sand and aggregate, in every unit used on Indian sites: bags, kilograms, cubic metres, cubic feet, brass and tonnes.

Volume in
Mix
Results update as you type.

Cement

9 bags

8.06 bags of 50 kg for 1 m³ of M20

Concrete volume
1 m³ (35.3 cft)
Cement by weight
403 kg
Sand
0.42 m³ (14.8 cft)0.15 brass
Aggregate (gitti)
0.84 m³ (29.7 cft)0.3 brass
Water (approx.)
202 litreswater–cement ratio 0.5
Sand (approx. weight)
0.67 tonnesat 1.6 t/m³
Aggregate (approx. weight)
1.26 tonnesat 1.5 t/m³

Nominal mixes are for estimating. Structural concrete should follow the engineer’s design mix. Add 3% to 5% for wastage.

About this calculator

Choose a standard grade, or enter your own ratio such as 1:2:4.

How to use it

  1. Enter the concrete volume.
  2. Choose a grade or enter a ratio.
  3. Read the quantities.

The formula

Each material = dry volume × its share of the ratio; dry volume = wet × 1.54
brass
100 cubic feet
1 m³
35.31 cft

Worked example

1 m³ of M20

  1. Dry volume = 1.54 m³.
  2. Cement = 1.54 × 1/5.5 = 0.28 m³ = 8.06 bags (403 kg).
  3. Sand 0.42 m³ (14.8 cft); aggregate 0.84 m³ (29.7 cft).

What the result means

Add 3% to 5% for wastage and spillage.

Assumptions

  • Volume batching.

Limitations

  • Weights of sand and aggregate depend on moisture and type.

Frequently asked questions

How much sand for 1 m³ of M20?

About 0.42 m³ or 14.8 cft.

What is a brass?

100 cubic feet, a common unit for sand and aggregate in India.

How heavy is a cement bag?

50 kg.

Last reviewed on 3 October 2026. Found a mistake? Tell us.