Understand Your Tint.
Check the Right Rule.
Start with measured glass-plus-film VLT, then check the vehicle and window conditions. Browse all 50 state research pages and see what is verified.
Check a tint VLT requirement
Use a measured combined glass-plus-film VLT reading. A film label alone cannot tell you the installed VLT. This is a limited check, not a certificate of complete compliance.
Choose your state, class and window, then enter the measured VLT.
Read the state rules and official sources
Estimate combined VLT from film and glass specifications
Approximation: glass VLT × film VLT ÷ 100. For example, 80% glass × 35% film = 28%. An estimate is not a calibrated measurement and is never used as a passing calculator result.
Popular States
Understanding Window Tint Percentages
What is VLT?
VLT stands for Visible Light Transmission. It measures the percentage of light that passes through a specified material; for installed tint, measure the glass and film together. A lower VLT percentage means darker tint — 5% VLT is a very dark "limo tint" while 70% is nearly clear.
Why Do Tint Laws Vary?
Each state sets its own window tint regulations. Laws typically differ between front side windows (stricter) and rear windows (more lenient). SUVs and trucks may have different limits than sedans in some states.
Medical Exemptions
Exemption processes differ. Follow the verified official instructions in our medical guide; a diagnosis is not automatic approval.
Prepare before buying film
Measure the installed glass
An 80% glass specification and 35% film estimate to 28% combined VLT. Film packaging is not a measurement. Understand VLT.
Check more than darkness
Windshield placement, mirrors, reflection and certification can matter. Find your state and official sources.