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Calcimator

Mortar Mix Calculator

Calculate cement, lime, and sand quantities for Type M, S, N, or O mortar based on the volume needed.

Inputs

cu ft
cu ft

Results

Cement Bags (94 lb)

2 bags

Hydrated Lime Bags (50 lb)1 bags
Sand7.5 cu ft
Water (approx.)11 gal
Yield Per Batch2.55 cu ft
How to Use This Calculator
  1. Select the mortar type (Type N for general use, Type S for below-grade, Type M for heavy loads).
  2. Enter the total mortar volume needed in cubic feet.
  3. Set your desired batch size.
  4. Review the cement, lime, and sand proportions in pounds or bags.
  5. Mix mortar to the right consistency — it should hold its shape without slumping.

What each input means

Mortar Type
1 = Type M (2500 psi), 2 = Type S (1800 psi), 3 = Type N (750 psi), 4 = Type O (350 psi).
Mortar Volume Needed
Total volume of mixed mortar required for the job.
Batch Size
Volume of each individual mix batch (typically 2-4 cu ft).

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    Mortar Type = 2, Mortar Volume Needed = 10, Batch Size = 3 = 3 input(s) provided
  2. Calculate Cement Bags
    Cement Bags
    2 = 2
  3. Calculate Hydrated Lime Bags
    Hydrated Lime Bags
    1 = 1
  4. Calculate Sand
    Sand = sandCuFtRounded
    7.5 = 7.5

Engine last updated . Checked against 1 independently-derived test — how we verify calculators.

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