Concrete Mix Calculator – Financial Calculators

Construction Tool Concrete Mix Calculator Calculate the exact volume and aggregate weights required for a standard mixing ratio.

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Understanding Concrete Volume & Ratios

To build a structurally stable slab or footing, you need to calculate the raw volume and apply a margin for waste (typically 10%). This calculator runs on a standard structural concrete formula using a classic 1:2:3 ratio (1 part cement, 2 parts sand, 3 parts gravel).

Volume = Length × Width × Depth

Weights based on Material Densities: Cement (~1400kg/m³), Sand (~1600kg/m³), Gravel (~1500kg/m³).

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Dimensions & Specifications

Unit System

Wastage Margin

Length

Width

Thickness / Depth

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Required Materials Breakdown

Total Volume (With Waste) —

Total Pre-Mix Bags (25kg / 60lb) —

Estimated Standard Ratio Breakdown (Raw Components)

— Cement

— Sand

— Gravel

Calculations are estimates. Real-world water content and variations in aggregate compaction will shift final material densities.