Free lost-wax casting planner

Turn wax into gold.

Open a 3D model of your piece and Alchemy Cast builds the sprue tree for your flask, metal and casting method. Then it walks you through the whole casting day: investment, burnout and kiln program, alloying, the job quote, and a log of every cast.

Open the app See what it does

Free
No sign-up
Runs in your browser
Works offline

A sprue tree of rings and pendants on a trunk, inside a flask, in the Alchemy Cast 3D viewer

How it works

From model to pour

The Setup Wizard asks about your pattern, investment, flask, metal and casting method, then sets up every page to match. Change anything later and the rest follows.

Open your model
STL, OBJ or 3MF. Load several parts, each with its own quantity, to cast them in one pour.
Grow the tree
Auto-sprue sizes the feeds, trunk and button and lays the pieces out in the flask with safe clearances.
Invest and burn out
Powder and water amounts, a mix timer, the burnout chart and a kiln program in your controller's own words.
Pour and learn
Weigh the tree for the metal you need, then log the result. The troubleshooter helps when a cast goes wrong.

Features

Everything for the casting day, in one place

Tap any picture to see it full size.

Sprue trees

Setup Wizard

Eight short steps from model to pour. It generates the tree and the burnout plan in one go, and Cancel puts every setting back.

Automatic or hand-built trees

Auto-sprue for centrifugal, vacuum or tilt casting. Then move, turn or scale any piece, and the feeds follow. A 14-rule tree check runs before you export.

Thin-wall check

Colours the model by thickness, flags spots too thin to fill, and checks the feed meets the heaviest section. Shrinkage scaling and a ring-size helper keep rings true to size.

Print it or build it by hand

Export the tree as STL or 3MF for a resin printer, or print a build sheet with a cut list matched to standard wax wire and rod.

Investing and burnout

Burnout chart and casting day plan

Investment data from 9 makers, powder and water for any flask, a mix timer, and a plan worked backwards from when you want to pour.

Kiln program sheet

Your cycle as segments for 12 kiln controllers, in the words the display shows, with the key presses to enter it. Print it to keep by the kiln.

Casting with stones in place

Pick from 29 stones to see which survive the burnout. The cycle is held under the safe limit, with the sources for every figure.

Metal, molds and money

Alloying

Recipes for about 40 precious and base alloys, and a calculator that turns one into grams of each metal, with live spot prices.

Molds and wax

Frame fit, cure times for 16 rubbers, master sizing for shrinkage, settings for 20 injection waxes, and a printable mold label.

Job cost and quote

Metal, investment, wax or resin, kiln energy, finishing loss and labour add up to a quote per piece, in your local currency.

Learn from every cast

Casting log

Every cast with its settings, result and photos. After a few casts it learns your real melt loss and how your trees weigh against the estimate.

Defect troubleshooter

Pick what went wrong, such as porosity, incomplete fill or fins, and see the likely causes and the setting to change.

Supplies near you

A catalogue of casting supplies with links to stores that serve your country, plus a safety checklist and a reading list.

At the bench

On your computer, tablet or phone

Alchemy Cast runs in any modern browser. Install it and it opens in its own window, keeps working without internet, and updates itself.

Android: open the app, then choose Install app or Add to Home screen from the browser menu.
iPhone and iPad: open the app in Safari, tap Share, then Add to Home Screen.
Windows, Mac and ChromeOS: open the app in Chrome or Edge and click the install icon in the address bar.
Your language: English, Spanish, Portuguese, Italian, German, Turkish, Hindi and Thai, with prices in your currency.
Your files stay yours: models and projects stay on your device. Nothing is uploaded.

Learn and share

Ready for your next pour?

Start the Setup Wizard with an STL, OBJ or 3MF file and have a tree in a few minutes.

Open the app