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Cement Calculator

Construction
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Calculates the amount of cement needed for concrete or mortar mixes based on the desired ratio.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Aggregate Volume (cubic feet) and Cement to Aggregate Ratio in the units shown.

Step 2

Read Aggregate Ratio Value, Cement Ratio Value, and Cement Needed (bags) in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Concrete 1:2:4 (Aggregate Volume: 1 cu ft)

Aggregate Volume (cubic feet): 1; Cement to Aggregate Ratio: 1:2:4 (Concrete)

Aggregate Ratio Value: 6; Cement Ratio Value: 1; Cement Needed (bags): 15.66666667 bags

Concrete 1:1:2 (Aggregate Volume: 1 cu ft)

Aggregate Volume (cubic feet): 1; Cement to Aggregate Ratio: 1:1:2 (Concrete)

Aggregate Ratio Value: 4; Cement Ratio Value: 1; Cement Needed (bags): 23.5 bags

Mortar 1:3 (Aggregate Volume: 1 cu ft)

Aggregate Volume (cubic feet): 1; Cement to Aggregate Ratio: 1:3 (Mortar)

Aggregate Ratio Value: 4; Cement Ratio Value: 1; Cement Needed (bags): 23.5 bags

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