Separate Plaster Coat Product Bag calculator.
Order each separately specified plaster product from its measured area, coat depths and mixed bag yield.
Your inputs
Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.
A clear estimate starts here.
Enter your dimensions and product details to see the quantity and purchase breakdown.
Formula and assumptions
How this calculation works.
Order each separately specified plaster product from its measured area, coat depths and mixed bag yield. Bags per product = ceil((area − exclusions) × depth × coats × allowance / product mixed yield).
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Your additional material allowance
- 0 %
- Measured coated area
- 20 m²
- Excluded area
- 0 m²
- Specified wet coat depth
- 10 mm
- Identical coats of this product
- 1
- Mixed volume yield per bag
- 15 L/bag
- Measured coated area
- 20 m²
- Excluded area
- 0 m²
- Specified wet coat depth
- 2 mm
- Identical coats of this product
- 1
- Mixed volume yield per bag
- 10 L/bag
Total bags across separate plaster products: 18 bags
Each row is a distinct product with its own mixed yield. Supplied coat depth and count are not installation recommendations; product rows do not pool bags.
Before you purchase
Use dimensions from your plan and properties from your chosen product. Any design spacing, section or fixing pattern must already be specified.
All product dimensions, coverage, density, allowances and joining rules must come from your supplied plan or selected product. No building-code values are inserted.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-05. Calculation and review policy.