Calculator Inputs
The page uses a single-column flow. Inside this calculator area, inputs shift to three columns on large screens, two on medium screens, and one on mobile.
Formula Used
1) Net weight gain: Weight Gain = Final Weight − Initial Weight
2) Percent gain: % Gain = (Weight Gain ÷ Initial Weight) × 100
3) Coating loading: Loading (g/m²) = Weight Gain ÷ Coated Area
4) Target gain per part: Target Gain = Target Loading × Coated Area
5) Deviation from target: % Deviation = ((Actual − Target) ÷ Target) × 100
6) Dry coating volume: Volume = Weight Gain ÷ Density
7) Estimated dry thickness: Thickness (µm) = Weight Gain ÷ (Density × Area in m²)
8) Required wet pickup: Wet Pickup = Weight Gain ÷ (Solids Fraction × Transfer Efficiency Fraction)
Thickness is an engineering estimate. Surface texture, edge build, porosity, and cure shrinkage can change the true measured film thickness.
How to Use This Calculator
- Enter the uncoated part weight and the final coated weight.
- Select the same weight unit used during weighing.
- Enter the coated surface area and choose the matching area unit.
- Provide coating density for thickness estimation.
- Enter solids content and transfer efficiency for wet pickup planning.
- Set the target coating loading and allowed tolerance.
- Enter batch quantity to estimate total dry gain and wet pickup.
- Press the calculate button to view results, chart, and export options.
Example Data Table
These sample panels use a target of 35.00 g/m² with a ±5% acceptance band.
| Sample | Initial Weight (g) | Final Weight (g) | Gain (g) | Area (m²) | Loading (g/m²) | Status |
|---|---|---|---|---|---|---|
| Panel A | 95.00 | 99.10 | 4.10 | 0.120 | 34.17 | PASS |
| Panel B | 98.40 | 102.80 | 4.40 | 0.125 | 35.20 | PASS |
| Panel C | 92.70 | 96.50 | 3.80 | 0.110 | 34.55 | PASS |
| Panel D | 101.20 | 105.90 | 4.70 | 0.135 | 34.81 | PASS |
Frequently Asked Questions
1) What does coating weight gain mean?
It is the dry mass added to a part after coating. Comparing before and after weights helps estimate deposited coating, area loading, and expected dry film thickness.
2) Why is coated area required?
Area converts simple mass gain into loading per unit surface. That makes results comparable across parts, batches, and process settings, even when part sizes differ.
3) Why does the calculator ask for density?
Density converts dry coating mass into coating volume. That volume estimate is then used to approximate dry film thickness over the coated surface area.
4) What is solids content used for?
Solids content estimates how much wet material is needed to leave the measured dry deposit. Lower solids require more wet pickup to reach the same dry gain.
5) What does transfer efficiency change?
Transfer efficiency estimates process losses during spraying or application. Lower efficiency means more wet coating is needed because more material misses the part or is lost.
6) Why might thickness differ from measured gauge values?
Real coatings can shrink, bridge edges, sink into texture, or build unevenly. This tool gives a calculated estimate, while gauges read actual local thickness.
7) Can this calculator help with production planning?
Yes. Batch quantity, solids content, and transfer efficiency allow quick estimates of total dry coating demand and total wet pickup needed for a production lot.
8) Which target unit should I choose?
Use the unit already defined in your specification or quality document. The calculator converts values internally, so you can work in g/m², mg/cm², or oz/ft².