MixByParts

3:1 in 1 gallon

Precise mix and dilution math, with optional density-derived gram targets and copy-to-label tools.

Exact amounts (pre-calculated)

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  • Resin96 fl oz by volume
  • Hardener32 fl oz by volume

Add 96 fl oz Resin and 32 fl oz Hardener to make 1 US gal.

How to mix 3:1 in 1 gallon

This calculator treats 3:1 as resin-to-hardener by volume and divides the 1 gallon total accordingly. Use the manufacturer’s separate by-weight ratio when it provides one.

  1. Confirm that the manufacturer specifies four parts resin to one part hardener by volume.
  2. Measure the resin and hardener amounts shown in the Exact amounts card.
  3. Combine and mix using the manufacturer’s timing, temperature, and safety instructions.

Accuracy tips

Resin and hardener densities can differ, so a volume ratio must not be assumed to be the same numeric ratio by weight. Use the exact product technical data.

Other containers for 3:1
500 mL16 oz24 oz32 oz250 mL750 mL1 liter5 liters15 liters
Other ratios for 1 gallon
2:11:14:15:1

How this is calculated

For a ratio of a:b, each part is a/(a+b) and b/(a+b) of the total. PPM mode uses 1 ppm ≈ 1 mg/L for aqueous solutions. Show gram targets to convert those calculated volumes using the densities you provide; the ratio itself remains volume-based.