Concrete Mix Design Calculator — Nepal (IS 456 / IS 10262)
Calculate cement bags, sand volume, and aggregate weight for M15, M20, and M25 concrete mixes in Nepal.
Concrete Mix Materials Estimator
Estimate Cement, Sand, Aggregate & Water quantities for nominal concrete mixes.
Estimated Materials
Cement Bags00 kg
Water Required0Liters
Fine Aggregate (Sand)0cft(0 m³)
Coarse Aggregate0cft(0 m³)
Volume Mix Proportion
Cement
Sand
Aggregate
Estimation Note: Standard dry volume conversion assumes concrete volume is reduced by ~30-35% when water is added and mixed. The default Dry Factor of 1.54 is widely used in Nepal for structural concrete mix design. One cement bag is taken as 50 kg (~34.7 Liters or 1.226 cubic feet).
Concrete Mix Design & Material Estimation Norms in Nepal
In reinforced concrete construction across Nepal, calculating dry material volumes requires accounting for voids between aggregate particles. A dry volume conversion factor of 1.54 is applied to wet concrete volume.
| Grade | Nominal Mix (Cement : Sand : Aggregates) | 28-Day Strength | Typical Structural Application |
|---|---|---|---|
| M10 | 1 : 3 : 6 | 10 N/mm² | PCC, Leveling course, Footing base |
| M15 | 1 : 2 : 4 | 15 N/mm² | Plain concrete, compound walls, non-structural slabs |
| M20 | 1 : 1.5 : 3 | 20 N/mm² | Standard residential RCC beams, slabs, columns (NBC 206) |
| M25 | 1 : 1 : 2 | 25 N/mm² | High-rise columns, water tanks, heavy commercial foundations |
Consult USEC Engineers: For multi-story commercial buildings, we conduct laboratory mix design trials as per IS 10262 to optimize cement consumption and guarantee 28-day cube strength.