Cement Pack ProConcrete quantity tools

Materials & supply

Concrete recipe quantities

Calculate ingredient weights for a larger or smaller batch using an existing recipe and its finished concrete yield.

Enter your measurements

Example values are prefilled. Replace them with your measurements before using the estimate. JavaScript is required to calculate.

ft³

Enter 0 to return zero ingredient quantities.

ft³

Use the measured or documented finished concrete volume for one batch of this recipe, not the loose dry ingredient volume.

lb

Enter the cement weight for one batch of your existing recipe.

lb

Use the sand weight and moisture condition specified in your recipe.

lb

Use the aggregate weight and moisture condition specified in your recipe.

lb

Enter the known water weight for one batch, or leave blank if unknown.

How it is calculated

Scale factor = target finished volume / known finished batch yield; each ingredient mass = source batch mass × scale factor.

Keep the full result when using it in another calculation. Results show up to three decimal places; very small positive results use scientific notation (for example, 1e-6). No extra material for waste is added.

Start with a documented or measured batch

Use ingredient weights from an existing recipe and the finished concrete volume produced by that same batch. Do not substitute the loose volume of dry ingredients for finished concrete yield. Keep each ingredient’s units and moisture basis consistent with the recipe you are scaling.

The calculator finds a scale factor by dividing the target finished volume by the known batch yield. It multiplies each supplied ingredient mass by that factor; it does not select proportions or design a mix.

Scale the example and handle missing water

If a batch yields 3.5 ft³ and the target is 7 ft³, the scale factor is 7 ÷ 3.5 = 2. A recipe with 94 lb cement, 235 lb sand, and 259 lb aggregate scales to 188 lb, 470 lb, and 518 lb respectively.

The source recipe does not provide a water weight, so the calculator leaves water out unless you enter a known batch amount. If the documented finished yield is a range, calculate both endpoints separately; one selected yield produces one estimate, not a guaranteed batch result.

Before you use the result

  • Use an existing recipe with ingredient weights and a known finished volume per batch. This calculator does not design a mix, predict strength, or adjust for moisture.
  • The example uses 3.5 ft³ of finished concrete per batch. Your actual yield may differ.
  • Enter water only if its weight is known for that recipe. Leave it blank if unknown.
Concrete bag count

Calculate how many bags of concrete mix you need using your required volume and the mixed yield per bag.

Concrete and aggregate weight

Convert concrete or aggregate volume to weight using the density of your material.