Technology & Computing
Solder Paste Stencil Aperture Area Ratio Calculator
Calculate the stencil aperture area ratio used to predict solder paste transfer efficiency for fine-pitch SMT pads.
Your inputs
Change any value to update the result instantly.
Aperture area ratio
1
Aperture area
0.36 mm²
Aperture wall area
0.36 mm²
Reliable transfer (≥0.66)
1
An area ratio of 0.66 or higher is the typical rule-of-thumb minimum for reliable, consistent solder paste release.
Formula and working
Area ratio = Aperture area ÷ Aperture wall area = (L×W) ÷ (2×(L+W)×stencilThickness)
- 1
Collect the inputs
Aperture length (mm) = 1.2; Aperture width (mm) = 0.3; Stencil thickness (mm) = 0.12
- 2
Apply the formula
Area ratio = Aperture area ÷ Aperture wall area = (L×W) ÷ (2×(L+W)×stencilThickness)
- 3
Result
Aperture area ratio = 1
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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