Rectangular Mould Box Master Displacement Kit calculator.
Subtract supplied master displacement from a measured rectangular mould box before ordering mixed material kits.
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.
Pour volume = inside width × inside length × chosen pour height − supplied submerged master displacement, summed across moulds. Does not choose mould wall dimensions, casting compound, mix ratios, ventilation or curing.
A worked example
Illustrative inputs only. Product properties and design dimensions are not recommendations for your project.
- Selected mixed volume yield per kit or bag
- 1 L/bag
- Inside box width
- 0.2 m
- Inside box length
- 0.3 m
- Chosen measured pour height
- 0.1 m
- Supplied submerged master displacement
- 0 m³
- Identical moulds
- 1
Selected mixed-material packages: 4 packages
Only the supplied submerged displacement is deducted; a bounding box is not automatically treated as the master volume. Product suitability, curing, strength and mixing specifications are not selected.
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.
Does not choose mould wall dimensions, casting compound, mix ratios, ventilation or curing.
All dimensions, properties and application patterns are user-supplied. No building-code default is inserted.
Method: dimensional arithmetic and user-supplied specifications. Software checks: 2026-10-06. Calculation and review policy.
Check your purchase assumptions
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