What Is an Epoxy Resin Calculator
An epoxy resin calculator helps you determine exactly how much epoxy you'll need to coat a specific surface, whether it’s flat or circular. It uses basic inputs like length, width, diameter, and thickness to estimate total volume, weight, and (optionally) cost based on your resin price. This tool is ideal for DIY projects, woodworking, countertops, floors, river tables, and any craft where resin coverage must be precise.
How To Use the Infinity Calculator Epoxy Calculator
Our epoxy calculator is simple and accurate. It supports both flat and circular surfaces, with full unit flexibility (imperial and metric). Results update instantly with just a few inputs.
Step 1: Enter Surface Information
Choose the appropriate tab for your surface shape:
- Flat Surface: Enter length, width, and thickness
- Circular Surface: Enter diameter and thickness
If you'd like a cost estimate, enter the price per unit (gallon, liter, ounce, etc.). The calculator will adjust based on the measurement system you select.
Input Guide
- Width: The width of the area you want to coat with epoxy
- Length: The length of the area (only for rectangular shapes)
- Thickness: How deep the epoxy will be poured or spread
- Diameter: For round pours, used instead of length/width
- Cost: Your epoxy price (per gallon, liter, ounce, or milliliter)
Step 2: View Your Results
- Volume of epoxy needed in multiple units (e.g., in³ and ft³ or cm³ and m³)
- Epoxy Required based on volume-to-weight conversion (oz, gal, ml, L)
- Total Cost (if cost was entered)
Switch between imperial and metric views anytime using the toggle provided above the results table.
Mix Ratios and Measurement Units
To get accurate results when preparing epoxy resin, it's important to understand mix ratios and how to convert measurement units appropriately. A 1:1 ratio means equal parts resin and hardener by volume, often used in art resins. A 2:1 ratio, common in structural applications, requires two parts resin to one part hardener. Some formulations may use weight-based ratios like 100:43. Always follow the manufacturer's guidance on whether to measure by weight or volume.
Common Measurement Units
Epoxy volume is often measured in fluid ounces (oz), gallons (gal), milliliters (ml), and liters (L). Dimensional estimates may be expressed in cubic inches (in³) or cubic feet (ft³), especially when calculating surface volume.
Epoxy Coverage and Coating Thickness
The total volume of epoxy required depends on the thickness of your coating and the surface area being covered. Standard flood coats are often about 1/8" (0.125") thick. Additional epoxy may be needed for edge coverage, multi-layer finishes, or rough, porous surfaces that absorb resin. In general, it's smart to slightly overestimate your epoxy needs to avoid running short mid-project.
Tips and Best Practices for Epoxy Use
Before beginning your epoxy project, ensure your surface is clean, dry, and level. Use separate containers for measuring and mixing Parts A and B, and always adhere to the recommended mix ratio. Avoid exceeding the manufacturer’s pour depth per layer and allow each layer to fully cure before applying the next. For safety, work in a well-ventilated area and wear gloves and eye protection.
Types of Epoxy Applications
Different types of epoxy are suited for different projects. Seal coats are thin layers used to prime porous materials. Flood coats provide a smooth top finish for surfaces like bar tops and tables. Deep pour epoxy is designed for thicker layers, such as river tables, while art resins and casting resins are used in crafts, jewelry, or mold work. Each application has different coverage needs, so it’s essential to use the correct type.
Project Dimensions and Shape Considerations
Your epoxy volume estimate depends on the size, shape, and depth of your project. The calculator handles rectangular and circular surfaces, but custom shapes may require manual adjustment or a buffer. Considerations such as overflow allowance, porous surfaces, irregular edges or indents, and containment walls or dams will all influence how much resin you need. Always round up slightly to ensure complete coverage.