Step 1
Measure the inside cavity in centimetres, millimetres or inches. Use the actual intended fill depth.
Mold volume
Calculate rectangular or cylindrical mold cavity volume using inside dimensions, quantity and your chosen extra allowance.
MIXKIND / WORKSPACE
Your project, in numbers
Live estimate
Amount including extra
160 mL0.16 L
- One cavity
- 160 mL
- All cavities, without extra
- 160 mL
- Your extra allowance
- 0 mL
Use the manufacturer’s instructions for the exact product. This calculator does not recommend a formulation, cure schedule, pouring depth or chemical handling procedure.
MIXKIND / THE METHOD
How to use this tool
Rectangle: V = length × width × depth. Cylinder: V = π × (diameter ÷ 2)² × depth. Total = one cavity × count × (1 + allowance ÷ 100).
Worked example
A 10 × 8 × 2 cm cavity has 160 mL of geometric volume. Three cavities need 480 mL. With a user-selected 5% allowance, the plan is 504 mL.
Step 2
Choose a rectangle or circular cylinder, then enter how many identical cavities you will fill.
Step 3
Add your own allowance if required. Review the net volume and extra volume separately.
Does this include objects inside the mold?
No. The model assumes an empty straight-sided cavity. Embedded objects, irregular surfaces and sloping walls require a separately measured displacement or capacity.
Does the extra allowance set a mixing ratio?
No. It increases the planned combined volume only. The A:B ratio and whether it is by mass or volume still come from the product instructions.
MIXKIND / TOOLKIT
Four ways to plan the same project.
02
Volume & weight
Convert volume to mass, or mass to volume, using the density you enter from the matching product data.
Open tool03
A:B mix ratio
Split a known total or a known amount of part A using the exact A:B ratio and mass or volume basis specified by your product.
Open tool04
Batch cost
Add up known masses of A and B, your material prices and the number of identical batches. No live prices or currency conversion.
Open tool