About

Running short on concrete during a pour creates cold joints, compromising structural integrity. Conversely, over-ordering incurs disposal fees and material waste. This utility converts ordered mass (tons) to volume (m³), a critical step since batching plants sell by weight, but formwork is filled by volume.

Different aggregates drastically alter density. A cubic meter of reinforced concrete is significantly heavier than lightweight aerated concrete. Furthermore, the state of the mix (Wet vs. Dry) affects the calculation; water addition typically increases the mass per unit volume by 5 - 15%.

Formulas

The volume is derived from the fundamental density equation. Note that ρ changes based on the hydration state.

V = m × 1000ρ_mix

Where:

m is mass in Metric Tons.
ρ is density (kg/m³).

Reference Data

Concrete Grade / Type	Dry Density (kg/m³)	Wet Density (kg/m³)	Strength Class
Lightweight (Aerated)	600 - 800	N/A	Insulation
Cinder Concrete	1,200 - 1,500	1,450	Non-structural
M100 (Lean Mix)	2,200	2,300	C7/10
M200 (Standard)	2,300	2,380	C16/20
M300 (Structural)	2,350	2,420	C25/30
M400 (High Strength)	2,400	2,480	C35/45
M500 (Heavy Duty)	2,450	2,520	C40/50
Reinforced Concrete (RC)	2,500	2,550+	Structural
Asphalt Concrete	2,240	2,350	Paving

Frequently Asked Questions

Dry density refers to the solid ingredients (cement, sand, aggregate) before mixing or after fully curing and drying. Wet density is the weight of the fresh mix including water. When ordering ready-mix, use the "Wet" setting.

No. This tool calculates the exact mathematical volume. For ground pours, industry standard suggests adding a 5-10% safety margin for uneven subgrades and spillage.

Reinforced concrete contains steel rebar. Steel has a density of roughly 7850 kg/m³, which is about three times denser than plain concrete, increasing the overall average density.

Yes, select "Asphalt Concrete" from the list. It typically has a slightly lower density than structural cement concrete depending on the bitumen content.