โ๏ธ DIY & Craft
Casting Resin Calculator
Casting resin needs enough volume to fill the mould completely, which is a volume calculation rather than a coating one. Adding a margin matters because resin shrinks slightly as it cures and a mould that is one pour short leaves a visible line.
How it works
Mould volume
Number of moulds or pours
Resin part
Hardener part
Shrinkage allowance
Price per litre of kit
Total resin needed
Total resin needed
Part A
Part B
Resin cost
Cost per mould
Frequently asked questions
How do I use the Casting Resin Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.