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Calcimator

Marine Coating System Calculator

Calculate VOC content (g/L), batch component weights, and regulatory compliance from paint formulation percentages and batch size.

Inputs

%
%
%
%
%

Results

VOC (g/L)

417.1

EPA 450 g/L (1=pass)

1

VOC (lb/gal)3.48
Est. volume solids (%)56.3
Resin weight (kg)350
Pigment weight (kg)250
Solvent weight (kg)300
Batch volume (L)769.23
How to Use This Calculator
  1. Enter vessel or structure type, exposure zone (atmospheric, splash, immersion, or buried), and design life (years).
  2. Select surface preparation standard: Sa 2.5 (near-white blast) is typically required for immersion zones.
  3. Read recommended coating system specification: primer, midcoat, and topcoat with DFT per coat.
  4. Review total dry film thickness (microns) and minimum recoat windows between coats.
  5. Compare coating system options by total applied cost ($/m2) and expected service life.

How the result changes with Coating density (kg/L)

Coating density (kg/L)VOC (g/L)EPA 450 g/L (1=pass)
0.75233.81
1.38444.71
2.13715.20
2.75956.50

What each input means

Batch size (kg)
Total batch weight in kilograms.
Resin / binder (%)
Binder/resin percentage by weight. Percentages are auto-normalized to 100%.
Pigment / filler (%)
Pigment and extender percentage by weight.
Volatile organic solvent (%)
Organic solvent percentage (contributes to VOC).
Water (%)
Water percentage by weight (excluded from VOC calculation per EPA Method 24).
Additives (%)
Additives (dispersants, defoamers, biocides) percentage by weight.
Coating density (kg/L)
Wet paint density. Solvent-borne: 1.0–1.4, high-solids: 1.3–1.8 kg/L.

What each result means

VOC (g/L)
Volatile organic compound content per EPA Method 24 (minus water).
VOC (lb/gal)
VOC in pounds per gallon for US regulatory reporting.
Est. volume solids (%)
Estimated volume solids from formulation weights (approximate).
Resin weight (kg)
Binder component weight for the batch.
Pigment weight (kg)
Pigment/filler component weight for the batch.
Solvent weight (kg)
Volatile organic solvent weight for the batch.
Batch volume (L)
Total batch volume in liters.
EPA 450 g/L (1=pass)
1 if VOC ≤ 450 g/L (EPA industrial maintenance limit), 0 if exceeds.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Batch size (kg) = 1000, Resin / binder (%) = 35, Pigment / filler (%) = 25, Volatile organic solvent (%) = 30 = 7 input(s) provided
  2. Calculate VOC
    VOC = coatingVolumeMinusWater > 0
    417.1 = 417.1
  3. Calculate EPA 450 g/L
    EPA 450 g/L
    1 = 1
  4. Calculate VOC
    VOC = vocGPerL * 0.008345
    3.48 = 3.48
  5. Calculate Est. volume solids
    56.3 = 56.3

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