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Calcimator

Epoxy Volume Calculator

Calculate the exact amount of resin and hardener needed for a rectangular mold based on dimensions and mix ratio.

Inputs

in
in
in

Results

Resin Needed (with 10% overage)

21.95 oz

≈ 6 sticks of butter

Hardener Needed (with 10% overage)

21.95 oz

≈ 6 sticks of butter

Total Mixed Volume43.88 oz
Total (Gallons)0.34 gal
Resin (exact)19.95 oz
Hardener (exact)19.95 oz
Mold Volume72 cu in
How to Use This Calculator
  1. Enter the mold dimensions: length, width, and depth in inches for rectangular molds.
  2. Select your resin's mix ratio (1:1, 2:1, or 3:1) from the product label.
  3. Read the total resin volume needed in ounces with 10% overage, plus the split between resin and hardener parts.
  4. Use the per-part weights to measure each component separately on a scale before combining.
  5. Check the gallons output when purchasing resin sold by volume rather than weight.

How the result changes with Mold Length

Mold LengthResin Needed (with 10% overage)Hardener Needed (with 10% overage)
1221.95 oz21.95 oz
4276.79 oz76.79 oz
78142.6 oz142.6 oz
108197.45 oz197.45 oz

What each input means

Mold Length
Interior length of the mold in inches. Measure the inside dimensions, not the outer mold box.
Mold Width
Interior width of the mold in inches.
Mold Depth / Pour Depth
Depth of the pour. Most deep-pour epoxies allow 1-2 inches per pour; tabletop epoxies are typically 1/8" to 1/4" per coat.
Mix Ratio
The resin-to-hardener ratio specified by your product. Using the wrong ratio will cause improper curing.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Mold Length = 12, Mold Width = 6, Mold Depth / Pour Depth = 1, Mix Ratio = 1 = 4 input(s) provided
  2. Calculate Resin Needed
    Resin Needed
    21.95 = 21.95
  3. Calculate Hardener Needed
    Hardener Needed
    21.95 = 21.95
  4. Calculate Total Mixed Volume
    Total Mixed Volume
    43.88 = 43.88
  5. Calculate Total
    Total
    0.343 = 0.343

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