EPOXY RESIN CALCULATOR

These easy-to-use online calculators take the guesswork out of your project by converting dimensions into precise volume measurements.

From river tables and countertops to jewelry and art pieces, accurate calculations guarantee you’ll order the exact amount of product you need—avoiding costly mid-pour shortages or leftover materials.

Most reputable resin manufacturers now offer these calculators to help creators achieve professional-level results while keeping expenses in check. Learn how to make the most of these powerful tools and simplify your projects!

What the Epoxy Calculator Does

If you’re asking “How much resin do I need?”—you’re in the right place. Enter your project’s dimensions and this calculator estimates the epoxy required. It’s ideal for resin pours/coatings (tables, countertops, art). Note: it’s not intended for composite laminating (e.g., wetting out fiberglass cloth).

How It Works (Formulas)

Rectangular projects
Volume (in³) = Length × Width × Thickness

Round projects
Volume (in³) = π × (Diameter ÷ 2)² × Thickness

Unit conversions

• Fluid ounces (US fl oz) = in³ × 0.554113
  
• Gallons (US) = in³ ÷ 231
  

Tip: Enter coating thickness as a decimal (e.g., 1/8″ → 0.125).

How to Use the Epoxy Calculator

1. Choose shape – rectangular or round.
   
2. Enter dimensions – length & width (or diameter) and desired finish thickness.
   
3. Review results – the tool outputs total volume plus estimates in fl oz and gallons.
   
4. Add a margin – consider an extra 5–10% for edge loss, voids, and mixing waste.
   
5. Plan pours – for thicker builds, use multiple lifts per your epoxy’s max pour depth.
   

Why Volume & Thickness Matter

• Too little resin → dry spots, uneven finish, trapped air.
  
• Too much in one pour → excess heat (exotherm), yellowing, warping, or cracking.
  
• Dialing in volume at the right thickness helps you hit a smooth, consistent, defect-resistant finish.
  

Reverse Calculation (Optional)

Have a set amount of resin and want to know coverage?
1 fl oz = 1.80469 in³ → Area (in²) = (fl oz × 1.80469) ÷ Thickness (in).
Convert to ft² by dividing by 144.

Quick Fraction-to-Decimal Guide (inches)

• 1/8″ = 0.125
  
• 1/4″ = 0.25
  
• 3/8″ = 0.375
  
• 1/2″ = 0.50
  
• 5/8″ = 0.625
  
• 3/4″ = 0.75
  
• 7/8″ = 0.875
  
• 1″ = 1.00
  

Bottom line:

This calculator takes the guesswork out of resin pours. Enter your dimensions, choose your thickness, and get a precise epoxy estimate—so you can minimize waste, avoid defects, and finish with confidence.

FAQ

How do I calculate how much epoxy resin I need?

Calculate volume from your project’s shape: for rectangles use length × width × thickness, and for rounds use π × (diameter ÷ 2)² × thickness. Enter thickness as a decimal (for example, 1/8″ is 0.125″, about 3.175 mm). In metric, a simple rule of thumb is that 1 m² at 1 mm thickness equals 1 liter. Convert liters to kilograms by multiplying by your resin’s density (commonly ~1.1 kg/L), and include an extra 5–10% to cover edge loss, surface absorption, and mixing waste.

What is the coverage of 1 kg of epoxy resin?

Coverage depends on thickness and density. If the resin is about 1.1 kg/L, then 1 kg is roughly 0.91 L, which covers about 0.91 m² at 1 mm thickness. Halving the thickness roughly doubles the coverage, while doubling the thickness halves it. Always verify with your product’s stated density for precise results.

How much resin for 1 square meter?

Use the 1:1 rule in metric: 1 m² at 1 mm thickness requires about 1 liter. Converting to mass with a typical density of 1.1 kg/L, that’s roughly 1.1 kg per m² at 1 mm. Thicker or thinner coats scale linearly with thickness.

How much epoxy for a 1000 sq ft floor?

First convert area: 1000 ft² is approximately 92.9 m². Apply the metric rule to get volume: at 1 mm thickness you’ll need about 92.9 liters (around 102 kg at 1.1 kg/L), and at 2 mm you’ll need about 185.8 liters (around 204 kg). Add 5–10% contingency and follow your product’s guidance on maximum coat thickness per pour.

How much epoxy do I need per square meter?

At 1 mm thickness you’ll need about 1 liter per m², which is roughly 1.1 kg for a resin with density near 1.1 kg/L. Adjust proportionally for other thicknesses.

How do I calculate a square meter?

Measure length and width in meters and multiply them to get area in m². For circular areas, use π times the radius squared, with radius measured in meters. If your measurements are in feet, convert to meters first (1 ft ≈ 0.3048 m) and then multiply to get square meters.