Professional VLT Calculator
Calculate Visible Light Transmission with vehicle-specific factory glass data and legal compliance checking.
Select a vehicle for accurate calculations
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Vehicle-Specific Calculations
Selecting your specific vehicle will provide more accurate calculations based on window areas, complexity factors, and installation requirements.
VLT Calculator
Calculate Visible Light Transmission using IWFA standard formula
Input Parameters
Factory Tint (75%)
Dark Tint (35%)
Results
Enter VLT values to see calculation results
About VLT Calculation
IWFA Formula
The International Window Film Association (IWFA) standard formula calculates the combined VLT of multiple layers: VLT₁ × VLT₂ × VLT₃... ÷ 100^(n-1)
Legal Considerations
VLT regulations vary by location and window position. Always check local laws before installation. This calculator provides estimates only.