Enter your mold dimensions and get the exact amount of resin and hardener you need — no more guessing, no more waste.
Resin Quantity Calculator – Free Epoxy Resin Calculator
Guessing how much epoxy resin to mix wastes money or leaves you short mid-pour. This free resin quantity calculator works for rectangular molds, cylinders, spheres, or any known volume, and instantly splits your total into exact Part A and Part B amounts. As a complete epoxy resin calculator, it also converts between ml, ounces, liters, and grams. Built for resin artists, hobbyists, and makers across the USA, UK, Canada, Australia, and India.
Calculate Your Resin Amount
Why Use This Resin Quantity Calculator
How to Use the Resin Quantity Calculator
Pick your mold shape
Choose rectangle, cylinder, sphere, or known volume for irregular shapes.
Enter measurements
Type your dimensions in centimeters or inches, whichever you prefer.
Set ratio and buffer
Choose your resin's mix ratio and add a waste buffer percentage.
Get your exact amounts
See the total volume plus the precise Part A and Part B amounts to mix.
Resin Quantity Calculator Features
📐 Four Shape Modes
Rectangle, cylinder, sphere, or known volume for any mold you're working with.
⚗️ Automatic Ratio Split
Instantly see the exact Part A (resin) and Part B (hardener) amounts based on your ratio.
🧮 Waste Buffer Built In
Add a percentage buffer so you never run short mid-pour and have to remix.
⚖️ Weight Conversion
See your result in grams too, using an adjustable density value for scale-based mixing.
💧 Water Displacement Mode
Already measured your mold's volume with water? Enter it directly in known-volume mode.
🎯 Object-Subtract Mode
Encapsulating an item? Enter its volume and the calculator subtracts it automatically.
🧪 Pot-Life Batch Splitting
Set a max volume per batch and the tool splits your total into safe, evenly-sized pours.
🔒 Fully Private
Your measurements stay in your browser and are never uploaded or stored.
Who Uses a Resin Quantity Calculator?
💍 Jewelry Makers
Calculate precise small-batch amounts for pendant and earring molds without overmixing.
🪵 River Table Builders
Estimate large deep-pour volumes for wood-and-resin river tables and channels.
🎨 Resin Artists
Plan coating thickness for canvas art and tumblers with accurate volume estimates.
🏠 DIY Hobbyists
Avoid wasting expensive resin on coasters, trays, and craft molds by mixing the right amount.
🛠️ Mold Makers
Estimate silicone or resin volume needed to encapsulate an object in a custom mold.
🪑 Furniture Finishers
Plan tabletop and countertop coating amounts before starting a flood-coat project.
Resin Coverage Quick Reference
As a general rule, one liter of mixed epoxy resin covers approximately one square meter at a 1mm depth. Use this table as a starting point for common project types.
| Project Type | Typical Depth | Approx. Resin Needed |
|---|---|---|
| Coaster (10cm round) | 5mm | ~40 ml |
| Canvas art (40×50cm) | 2mm | ~400 ml |
| Tumbler wrap | Thin coat | ~60-90 ml |
| Small tray (20×15cm) | 1cm | ~300 ml |
| Tabletop (per sq. meter) | 2mm | ~2 liters |
| River table channel (150×30cm) | 4cm deep | ~18 liters |
These are general estimates — always confirm with the resin quantity calculator above using your project's exact dimensions.
Common Epoxy Resin Mix Ratios
| Ratio | Typical Use | For 300ml Total |
|---|---|---|
| 1 : 1 | Coating resin, coasters, tumblers, shallow art pours | 150ml resin + 150ml hardener |
| 2 : 1 | Some deep pour and casting resins | 200ml resin + 100ml hardener |
| 3 : 1 | Industrial and specialty deep pour systems | 225ml resin + 75ml hardener |
Tips for a Successful Resin Pour
🌡️ Room Temperature Matters
Mix and pour resin in a room between 20-25°C (68-77°F) for the most predictable curing time and fewer bubbles.
⏱️ Mind Your Pot Life
Once mixed, resin has a limited working time before it thickens — mix only what you can pour within that window.
🔥 Use a Heat Gun for Bubbles
Lightly pass a heat gun or torch over the poured surface to pop trapped air bubbles before the resin begins to gel.
🥽 Wear Protective Gear
Work in a ventilated area and wear gloves, since uncured epoxy resin can irritate skin on contact.
📦 Level Your Mold First
Uneven surfaces cause resin to pool unevenly — check your mold or tabletop is level before pouring.
🧪 Do a Small Test Batch
For a new resin brand, mix a small test batch first to confirm cure time and clarity before your full project pour.
What Is a Resin Quantity Calculator?
A resin quantity calculator is a free tool that estimates exactly how much epoxy resin and hardener you need for a mold, based on its volume and your product's mix ratio. Since guessing often leads to mixing too much (wasting expensive resin) or too little (leaving a visible seam line when you have to remix), this tool applies standard geometric formulas — length × width × depth for rectangles, π × radius² × height for cylinders, and (4/3) × π × radius³ for spheres — to calculate volume in milliliters, then splits that total into precise Part A and Part B amounts based on your chosen ratio.