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Epoxy resin calculator

Epoxy is mixed by a fixed ratio, and whether that ratio is by weight or by volume matters — the two are not the same.

g/cm3
%
Total mixed resin
10.560L
= Exact Resin volume
Resin part by volume
7040
Hardener part by volume
3520
Resin part by weight
7744
Hardener part by weight
3872
Total mixed weight
11 616
Depth within the usual single-pour limit Most deep-pour epoxies cap a single layer at 2 to 5 cm to control exotherm.
1
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  1. Pour length = 120
  2. Pour width = 40
  3. Pour depth = 2
  4. Resin parts = 2
  5. Hardener parts = 1
  6. Resin density = 1.1
  7. Waste allowance = 10
  8. volume_cm3 = 120 * 40 * 2 * (1 + 10/100) = 10 560
  9. Total mixed resin = 10 560 / 1000 = 10.56
  10. total_parts = 2 + 1 = 3
  11. Resin part by volume = 10 560 * 2 / 3 = 7040
  12. Hardener part by volume = 10 560 * 1 / 3 = 3520
  13. Total mixed weight = 10 560 * 1.1 = 11 616
  14. Resin part by weight = 11 616 * 2 / 3 = 7744
  15. Hardener part by weight = 11 616 * 1 / 3 = 3872
  16. Depth within the usual single-pour limit = 2 <= 2 ? 1 : 0 = 1

Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.

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    The formula

    • volume = length x width x depth x (1 + waste)
    • each component = volume x its share of the parts

    Mixing by weight and mixing by volume give different answers unless the two components have the same density. Follow whichever the manufacturer specifies.

    Pouring deeper than the rated maximum lets the exotherm run away; thick epoxy can reach temperatures that crack or scorch it.

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