▽ +09.00Engineering Hub · Calculator

Repair mortar calculator

Work out the volume, weight and bags of concrete repair mortar from the repair area, its average depth and the mortar density.

Inputs

The values shown are an illustrative example, not product data; replace them with your project values and the approved TDS.

Repair area

m²

The total area of the repair patches after breaking out.

Average thickness

The average repair depth; measure it at several points.

Density

kg/L

Fresh mortar density, or the consumption per mm from the TDS.

Waste (optional)

An allowance for cuts, overlaps, details and site losses.

Bag size (optional)

The net weight of one bag.

Total quantity504 kg

Results

Result of the example values

Volume: 240 L
Volume in m³: 0.240 m³
Consumption per m²: 40.0 kg/m²
Total quantity: 504 kg
Bags: 21 bags

Estimate only — final quantities depend on the approved specification, the product TDS and a site survey. No prices are given.

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+01.00Formulas

How it is calculated

Volume (L) = area (m²) × thickness (mm)
Quantity (kg) = volume × density × (1 + waste %)
Bags = round up [ quantity ÷ bag size ]

QQuestions

Questions clients ask

How do I estimate a concrete repair mortar quantity?

Work out the break-out volume — area × average depth — then divide it by the bag yield (the volume of mortar one bag makes, from the data sheet), and add a waste allowance.