# Free Plaster Calculator with EXCEL

This calculator estimates the required quantities of plaster sand and OPC to plaster a given area (12mm thickness).

Please note, before using the calculator embedded in this post understand the plastering cement mortar calculation concept.

Please enter the length and width of the wall or ceiling. In this post, we are going to explain to you, How to Calculate Cement, Sand Quantity for Plastering?

## How to Calculate Cement Sand in Plaster?

To calculate the amount of cement and sand required for plastering, you need to determine the plastering ratio and the thickness of the plaster you intend to apply. The most common ratio for plastering is 1:6, which means one part cement to six parts sand. Here’s how you can calculate the quantities:

Step 1: Determine the thickness of the plaster Decide on the thickness of the plaster you want to apply, such as 10mm, 15mm, or any other value.

Step 2: Calculate the volume of plaster Measure the length, width, and height of the area where you plan to plaster. Multiply these dimensions to obtain the volume of the plaster in cubic units (e.g., cubic meters or cubic feet).

Step 3: Convert the volume to the required unit (bags or kilograms) Convert the volume of plaster from step 2 to the desired unit, either in bags of cement or kilograms. To do this, you need to know the standard volume occupied by one bag of cement (usually 50kg or 0.035 cubic meters). Divide the volume of plaster by the standard volume of one bag to get the number of bags required.

Step 4: Calculate the quantity of sand Since the plastering ratio is 1:6, the quantity of sand required will be six times the quantity of cement calculated in step 3. Multiply the number of bags of cement by six to determine the quantity of sand in bags or kilograms.

Remember to account for wastage and round up the values to the nearest whole number to ensure you have enough materials for the plastering job. It’s always a good idea to consult with a local expert or refer to local building codes for specific recommendations and adjustments based on your region.

## How to Calculate Plaster Quantity?

To calculate the quantity of plaster needed for a specific area, you’ll need to determine the area to be plastered and the thickness of the plaster. Here’s how you can calculate the plaster quantity:

Step 1: Measure the area to be plastered
Measure the length and height of the wall or surface where you want to apply the plaster. Multiply these dimensions to obtain the area in square units (e.g., square meters or square feet).

Step 2: Determine the plaster thickness
Decide on the thickness of the plaster you want to apply, such as 10mm, 15mm, or any other value.

Step 3: Calculate the plaster quantity
Multiply the area from step 1 by the thickness from step 2. This will give you the volume of plaster needed in cubic units (e.g., cubic meters or cubic feet).

Step 4: Convert the volume to the required unit (bags or kilograms)
Convert the volume of plaster from step 3 to the desired unit, either in bags of cement or kilograms. To do this, you need to know the standard volume occupied by one bag of cement (usually 50kg or 0.035 cubic meters). Divide the volume of plaster by the standard volume of one bag to get the number of bags required.

Remember to account for wastage and round up the values to the nearest whole number to ensure you have enough materials for the plastering job. It’s always a good idea to consult with a local expert or refer to local building codes for specific recommendations and adjustments based on your region.