The practical formula
Pattern weight × target metal density ÷ pattern material density.
Then add sprue/button buffer based on your actual casting setup.
Then add shrinkage or safety allowance if your workflow requires it.
Finally price the estimated metal using your supplier price per gram.
Why pattern weight beats rough geometry
A scale captures complex shapes better than a rough box estimate.
It avoids pretending a ring, pendant, or organic sculpture is a simple rectangle.
It creates a repeatable starting point for quote snapshots.
FAQ
Can I use resin prints?
Yes, if you know or approximate the resin density. The app is designed for wax/resin pattern workflows.
Does sprue weight belong in the object weight?
Usually no. Keep object estimate and sprue/button buffer separate so the quote assumptions are clear.
Can this help with gold and silver?
Yes. Precious metals are a strong fit because supplier price, premium and buffer materially affect quotes.
Use the calculator on iPhone
Estimate metal weight, supplier cost, premium, margin and saved quote assumptions from one focused workflow.