Floor Coating System Calculator
Calculate material quantities for multi-layer floor coating systems (primer, body coat, topcoat) from floor area, DFT targets, and volume solids.
Inputs
Results
Body coat volume (L)
40
Total practical (L)
71.5
How to Use This Calculator
- Enter floor area (m²) along with primer, body coat, and topcoat dry film thickness (DFT) targets in microns — set any layer's DFT to 0 to skip it.
- Enter the coating's volume solids (%) and a waste factor (%) to account for mixing loss, edges, and surface texture.
- Read the theoretical volume needed for each layer (primer, body coat, topcoat) in liters.
- Review total theoretical and total practical volume (with waste factor applied), plus the combined system DFT.
- Check system coverage (m²/L) and the number of 1-gallon (3.78 L) kits needed.
How the result changes with Floor area (m²)
| Floor area (m²) | Body coat volume (L) | Total practical (L) |
|---|---|---|
| 10,000 | 2,000 | 3,575 |
| 35,000 | 7,000 | 12,512.5 |
| 65,000 | 13,000 | 23,237.5 |
| 90,000 | 18,000 | 32,175 |
What each input means
- Floor area (m²)
- Total floor area to coat in square meters.
- Primer DFT (µm)
- Primer dry film thickness. Set to 0 if no primer. Typical: 25–75 µm.
- Body coat DFT (µm)
- Main coating layer DFT. Self-leveling epoxy: 150–500 µm.
- Topcoat DFT (µm)
- Topcoat/sealer DFT. Set to 0 if none. Polyurethane topcoat: 50–100 µm.
- Volume solids (%)
- Volume solids of the coating. 100% solids epoxy is common for floors.
- Waste factor (%)
- Extra material for mixing waste, edges, and surface texture. Typically 5–15%.
What each result means
- Primer volume (L)
- Theoretical primer volume needed.
- Body coat volume (L)
- Theoretical body coat volume needed.
- Topcoat volume (L)
- Theoretical topcoat volume needed.
- Total theoretical (L)
- Sum of all layers with no waste.
- Total practical (L)
- Including waste factor.
- Total system DFT (µm)
- Combined dry film thickness of all layers.
- System coverage (m²/L)
- Overall system spreading rate.
- Gallon kits needed
- Number of 1-gallon (3.78 L) kits to purchase.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersFloor area (m²) = 200, Primer DFT (µm) = 50, Body coat DFT (µm) = 200, Topcoat DFT (µm) = 75 = 6 input(s) provided
- Calculate Body coat volumeBody coat volume = layerVolume(floorArea, bodyCoatDft, volumeSolids)40 = 40
- Calculate Total practicalTotal practical = totalTheoretical * wasteMultiplier71.5 = 71.5
- Calculate Primer volumePrimer volume = layerVolume(floorArea, primerDft, volumeSolids)10 = 10
- Calculate Topcoat volumeTopcoat volume = layerVolume(floorArea, topcoatDft, volumeSolids)15 = 15
Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.
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