Resin Calculator – ResinCalc
Epoxy Mix Ratio & Mold Volume
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Calculate exactly how much resin you need for any project. 57+ brands, 14 shapes, mix ratios, pot life timers & more. Try Pro free for 3 days!
Know how much resin to mix before you open the bottles.
ResinCalc turns a mold or a coating into a mix list: total volume, Part A and Part B in milliliters or grams, waste margin, batch count and cost — then times the pot life so the cup never cures before the pour.
WHY MAKERS KEEP IT ON THE BENCH
- Pick the shape (rectangle, round, hexagon, triangle, sphere, dome, oval, cone, coating layers and more), type the measurements in cm or inches, and get the answer in seconds.
- Choose a resin from the built-in library and its density, mix ratio, pot life and cure time fill in for you. 55+ brands covered: ArtResin, TotalBoat, Pro Marine, MAS, Stone Coat, Alumilite, Ecopoxy, EPODEX, West System, Smooth-On, Let's Resin and more. Add your own resin with any ratio.
- Work by volume or by weight — grams and ounces for the scale, milliliters and fluid ounces for the cups.
- Add a waste margin so a stirred cup still fills the mold, and multiply by batches for production runs.
- Start the pot-life timer from the result and get notified at five minutes, at one minute and when time is up, even with the phone in your pocket. Cure timers tell you when it is safe to demold.
PRO: FOR BIGGER PROJECTS
- Multi-mold batches: several molds, one mix.
- Multi-layer coatings: seal, flood and top coats, each with its own thickness.
- Pigment and mica amounts as a percentage of the mix.
- Temperature compensation: pot life and cure time adjusted to your room.
- Inventory: track what is left in each bottle and deduct every pour.
- Save mold presets, keep unlimited history, organize projects and export PDF mix sheets to share with a client or a class.
ResinCalc works in metric and imperial, on iPhone and iPad, in light and dark appearance.
SUBSCRIPTION
Pro is available as a monthly or annual auto-renewing subscription, or as a one-time lifetime purchase. The annual plan costs less per month, and a free trial is available on it. Prices are shown in the app in your local currency before you buy. Payment is charged to your Apple ID account at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the period ends. Manage or cancel subscriptions in your App Store account settings. Any unused portion of a free trial is forfeited when you purchase a subscription.
Privacy Policy: https://jyvapps.com/privacy
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
ResinCalc is an independent app and is not affiliated with, endorsed by or sponsored by any resin manufacturer; brand data is compiled from publicly available datasheets and may change. Results are estimates — always follow your resin manufacturer's instructions and safety guidance.
Ratings & Reviews
- Numbers accept a comma as the decimal separator, so 2,5 cm works on every keyboard.
- Single-part UV resins no longer show a Part B.
- Favorite brands stay favorited after a relaunch.
- Pot-life and cure timers keep accurate time after the app has been in the background.
Thanks for pouring with ResinCalc. If it saved you a cup of resin, a rating in the App Store helps other makers find it.
The developer, Farah Aydoni, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Farah Aydoni
- Size
- 16.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 17 or later.
- iPhone
Requires iOS 17 or later. - iPad
Requires iPadOS 17 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 3 more
- English, French, Portuguese, Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Pro Lifetime: Multi-Mold & PDF $39.99
- Pro Monthly: Multi-Mold & PDF $2.99
- Pro Yearly: Multi-Mold & PDF $19.99
- Copyright
- © 2026