Resin Mixing Ratio Calculator

Enter your A:B ratio and total volume to get exact Part A and Part B quantities for any batch size.

Calculate Your Resin Mix Quantities

Mixing a partial batch and don't want to waste product? Set the ratio from your label and how much you need in total, and the tool splits it into exact Part A and Part B amounts — for a full kit or any odd quantity in between.

Units

Enter the mix ratio printed on your product label (Part A : Part B by volume).

Common ratios:
How much mixed product you need in total — we split it into Part A and Part B.
Ratio2:1
Part A share66.7%
Part B share33.3%

Mix ratios must be exact. Even a small deviation can prevent proper curing. Always follow the manufacturer's technical data sheet for the specified ratio and mixing method.

Enter a ratio and total volume to calculate.

How the Resin Mixing Ratio Calculator Works

  1. Enter the Part A and Part B ratio from your product data sheet — for example, 2 and 1 for a 2:1 system
  2. Use a common ratio preset (1:1, 2:1, 3:1, 4:1) to fill the fields instantly
  3. Enter the total volume you need to mix and select your unit — Liters, Milliliters, US Gallons, or Kilograms
  4. The calculator outputs the exact Part A and Part B quantities, plus a visual breakdown of each share

Examples

Scenario15 L total at 2:1InputRatio 2:1 · 15 LitersResultPart A: 10.00 L · Part B: 5.00 L
Scenario3 gal kit at 4:1InputRatio 4:1 · 3 US GallonsResultPart A: 2.40 gal · Part B: 0.60 gal
ScenarioSmall 500 mL batch at 1:1InputRatio 1:1 · 500 MillilitersResultPart A: 250.00 mL · Part B: 250.00 mL

Frequently Asked Questions

What does a 2:1 mix ratio mean?

A 2:1 ratio means two parts resin (Part A) to one part hardener (Part B) by volume. For every 2 liters of Part A, you add 1 liter of Part B, giving a total of 3 liters of mixed product.

Is the mix ratio by volume or by weight?

Most epoxy floor coating systems specify the mix ratio by volume. Some high-performance systems use weight ratios — always check your product's technical data sheet. Select the matching unit (L, mL, gal for volume; kg for weight) in this calculator.

Can I mix a partial kit?

Yes — enter the exact amount you need to mix as the total, and the calculator will output the correct Part A and Part B quantities for that batch. The ratio must remain the same regardless of batch size.

What happens if the ratio is off?

Deviating from the specified mix ratio — even by 5–10% — can result in incomplete curing, a soft or tacky finish, delamination, or reduced chemical resistance. Always measure accurately, especially for small batches.

Important Notes

  • Always refer to your product's technical data sheet (TDS) for the correct mix ratio — ratios vary between products
  • For by-weight systems, use the kg unit; for by-volume systems, use Liters, mL, or Gallons
  • Pigment is typically pre-blended into Part A by the manufacturer — do not adjust the A:B ratio to account for it
  • Mix thoroughly for the full time specified on the TDS — undermixing causes soft spots even when the ratio is correct
  • Pot life decreases at higher temperatures — mix smaller batches in warm conditions
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