Window Tint Percentages Explained: 5%, 20%, 35%, 50% and 70% Compared
Window tint percentage is the amount of visible light the tint lets through, called VLT (visible light transmission). The lower the number, the darker the tint. 5% tint (limo tint) is almost black, 20% is dark, 35% is a popular medium shade, 50% is light and 70% or higher is barely noticeable. Most U.S. states set a legal minimum for the front side windows, often somewhere between 25% and 70%, and many allow darker tint on rear windows. Always check your own state’s law before you tint.
When a tint shop asks “what percentage do you want?”, the answer decides how your car looks, how private and cool it feels, how well you can see at night and whether you could get a ticket. The numbers feel backwards at first, so this guide explains each common tint percentage in plain terms and shows how to pick the right one.
What Do Window Tint Percentages Mean?
The percentage is the share of visible light that passes through the glass and film. A 35% tint lets 35% of light in and blocks 65%. Remember that car glass is not perfectly clear on its own, and many cars come with a light factory tint on the rear glass. When film goes on top, the final VLT is lower than the number on the film box. Police meters measure the final result, so a 35% film on slightly tinted glass may read around 30%.
Window Tint Percentage Chart
| Tint % | How it looks | Privacy | Night visibility | Common use |
|---|---|---|---|---|
| 5% (limo) | Almost black | Very high | Poor | Rear windows where legal |
| 15% | Very dark | High | Reduced | Rear windows, some SUVs |
| 20% | Dark | High | Reduced | Rear windows, sporty look |
| 35% | Medium, clearly tinted | Moderate | Good | Most popular all-round choice |
| 50% | Light | Low | Very good | Heat control with a subtle look |
| 70%+ | Nearly clear | Very low | Excellent | Front windows in strict states, heat and UV film |
5% vs 20% vs 35% Tint: Which Is Right for You?
- 5% tint gives the most privacy and a “limo” look. It is hard to see out of at night and it is illegal on front side windows in nearly every state.
- 20% tint is dark and private from outside, while still letting you see out in daylight. Many states only allow it on rear windows.
- 35% tint is the best balance for most drivers: clearly tinted, cooler cabin, good night visibility and legal on front windows in many states.
- 50% and 70% tint are for people who want heat and UV protection without a dark look, or who live in states with strict front window rules.
For deeper looks at individual shades, see 40 percent window tint explained and what 45 percent window tint looks like.
Is Your Tint Legal? How State Laws Work
Each state sets its own rules, and they usually differ by window:
- Windshield: usually only a strip at the top is allowed (often above the AS-1 line or the top 4 to 6 inches).
- Front side windows: the strictest limit. Limits vary widely by state. Many fall somewhere between 25% and 50% VLT, while the strictest states require 70% or allow film only along the top of the glass.
- Rear side and back windows: often any darkness is allowed on passenger vehicles, but some states set a limit here too.
- Reflectivity and colors: many states limit mirror-like film and ban certain colors such as red or amber.
- Medical exemptions: most states offer an exemption for darker tint with a doctor’s certificate.
Laws change, so check your state’s DMV or state police website or our state guides, such as California window tint law and New York window tint law. If you move states, your old tint may not be legal in the new one.
Tint Film Types: Does the Material Matter?
| Film type | Heat rejection | Price | Notes |
|---|---|---|---|
| Dyed | Low | $ | Cheapest, can fade or turn purple over time |
| Metalized | Medium | $$ | Durable, can interfere with phone and GPS signals |
| Carbon | Medium-high | $$ | Matte look, does not fade, no signal issues |
| Ceramic | High | $$$ | Best heat and UV rejection, even in lighter shades |
A light ceramic film can keep a car cooler than a dark dyed film, so you do not need to go dark to beat the heat.
- Ask the installer for the final measured VLT, not just the film number.
- Keep the installer’s receipt showing film type and percentage in the glovebox.
- Wait 3 to 5 days before rolling down freshly tinted windows.
- Choose a lifetime warranty film from a reputable brand.
- If you drive a lot at night, avoid going darker than 35% on the front.
Window tint percentage tells you how much light gets through: the lower the number, the darker the tint. 35% suits most drivers, 20% and 5% are best kept to rear windows, and 50-70% gives heat control with a light look. Check your state’s front window limit before you buy, and choose ceramic film if heat is your main concern.
Window Tint Percentage FAQs
20% is darker. It lets in 20% of visible light, while 35% lets in 35%.
It depends on your state and the window. Many states set the front side window limit between 25% and 50%, while strict states require 70% or more. Check your state’s current law.
Clearly tinted from outside, with people inside visible as shapes up close. From inside, visibility stays good day and night.
Only with difficulty. 5% tint makes night driving and reversing much harder, which is why most states ban it on front windows.
Not always. Heat rejection depends mostly on the film type. A good ceramic film at 50% can reject more heat than a cheap dyed film at 20%.
Yes. Police measure the total light through glass and film together, so film over factory-tinted glass reads darker than the film alone.
- Tint % = visible light let through (VLT).
- Lower number = darker tint.
- 35% is the best all-round choice.
- Front window limits vary by state.
- Ceramic film rejects the most heat.