M20 is a standard concrete grade used in building foundations, slabs, columns, and more. It provides a good balance between strength and cost for residential and light commercial structures.
What is the M20 Mix Ratio?
The mix ratio for M20 concrete is: 1:1.5:3 → 1 part Cement : 1.5 parts Sand : 3 parts Aggregate
This means for every 1 kg (or bag) of cement, you'll need 1.5 kg of sand and 3 kg of coarse aggregate.
How Much Cement is in M20?
For 1 cubic meter of M20 concrete:
- Cement required: ≈ 8 bags (1 bag = 50 kg)
- Sand required: ≈ 0.42 m³
- Aggregate required: ≈ 0.84 m³
- Water: ≈ 160 liters (0.5 water-cement ratio)
*Exact values may vary based on moisture, bulking, and site conditions.
Volume Formula
Use the dry volume formula: Wet Volume × 1.54 (to account for voids)
Example: For 1 m³ wet concrete → 1.54 m³ dry volume
Use Cases of M20
- Residential building slabs and footings
- Beams and columns of G+1 or G+2 buildings
- Light commercial RCC structures
Tools to Help
Try our cement & concrete calculator for quick estimations.
