Concrete Mix Calculator as per IS 10262

Concrete Mix Calculator — IS-style (per your uploaded example)

Enter inputs (defaults provided). Results are computed per 1 m³ and for the entered volume.

Volume to produce (m³)

Concrete grade (informational) M20 (default example) M25 M30 Custom

Water-cement ratio (w/c)

Slump / water content preset 25–50 mm slump (20 mm agg) — water ≈ 186 kg/m³ (default) 0–25 mm slump — water ≈ 170 kg/m³ 50–75 mm slump — water ≈ 201 kg/m³ Custom water content

Water content (kg per m³)

Chemical admixture (% by mass of cement)

Specific gravity: Cement

Specific gravity: Fine aggregate

Specific gravity: Coarse aggregate

Air entrainment / voids (fraction of volume)

Coarse aggregate volume fraction (by absolute volume)

Unit weight convert (kg per m³) constant

Results

Constituent	Per 1 m³ (kg)	For volume (kg)

Volume breakdown (absolute volumes in m³ per 1 m³)

Constituent	Volume (m³)

Notes: This calculator follows a simplified IS-style mix method:

• Cement mass calculated as: cement = water / (w/c).
• Volumes computed by dividing mass by (specific gravity × 1000).
• Remaining absolute volume (after cement, water, admixture, air) is split into coarse & fine aggregates according to provided coarse fraction.
• Defaults (water content, coarse fraction, sg values) are typical example values (edit as required).