Tint Percentage Calculator: Accurately Determine Your Window Tint VLT
Tint Percentage Calculator
Enter any 2 values to calculate the missing variable.
Whether you’re tinting your car windows, office glass, or residential windows, VLT (Visible Light Transmission) is a critical measurement. It determines how much visible light passes through the combination of the window and the tint film. Our Tint Percentage Calculator helps you figure out the final VLT value when tint is applied—or lets you find the tint or glass percentage if any two of the three variables are known.
This simple tool is especially useful for auto enthusiasts, professional installers, and anyone trying to stay compliant with local tint laws.
What Is VLT (Visible Light Transmission)?
Visible Light Transmission (VLT) is the percentage of visible light that can pass through a material. The higher the VLT, the more light passes through.
- A VLT of 100% means no tint—complete transparency
- A VLT of 20% means only 20% of visible light passes through, resulting in a darker appearance
This calculator helps you determine the missing value when you know any two of the following:
- Tint film VLT
- Original glass VLT
- Final combined VLT after tinting
Why Use the Tint Percentage Calculator?
✅ Comply with Legal Tint Limits
Many regions have legal limits for how dark you can tint your windows. This calculator helps ensure compliance.
✅ Determine Optimal Tint Level
It helps you plan how dark or light your tint needs to be for your desired result.
✅ Avoid Guesswork
Instead of estimating the final result, this calculator gives you an exact percentage.
✅ Easy to Use
Just input any two known values, and it automatically computes the third.
Who Should Use This Tool?
- 🚗 Car owners and enthusiasts
- 🏢 Commercial and residential window tint installers
- 🧑🔧 Automotive detailing and tint shops
- 👮♂️ Regulatory inspectors
- 🧑💻 Online tint buyers ensuring legal compliance
How the Tint Calculator Works
The tool requires any two of the following three inputs:
- Window Tint VLT (%) – the film itself
- Glass VLT (%) – the original window without tint
- Final Tint Percentage (%) – the combined light transmission after tint is applied
Example:
- Tint VLT = 20%
- Glass VLT = 80%
So, only 16% of visible light passes through the tinted window.
Features of the Calculator
- 🎯 Real-time calculations
- 🔁 Reset button for quick reuse
- 📱 Mobile responsive
- ⚙️ Works for automotive and architectural glass
- 🔐 No personal data collected
- 🧮 Accurate 2-value logic-based calculations
Common Tint Combinations
| Tint Film VLT | Glass VLT | Final VLT (Approx) |
|---|---|---|
| 50% | 90% | 45% |
| 35% | 70% | 24.5% |
| 20% | 85% | 17% |
| 5% (Limo tint) | 80% | 4% |
Use these as reference or simulate your own scenarios with the calculator.
Legal Compliance Across Countries
🇺🇸 United States
- Varies by state (e.g., 70% minimum in front windows in California)
- Rear windows may have lower VLT allowed
🇬🇧 United Kingdom
- 75% VLT for front windshields
- 70% for front side windows
🇦🇺 Australia
- 35% VLT common for front windows
- Varies slightly between states
Check local laws and use this tool to ensure your car remains street legal.
FAQs
❓ What is the difference between 20% and 35% tint?
20% is darker and allows less light to pass through than 35%. Both change the car’s appearance and comfort.
❓ Is this calculator accurate?
Yes. It’s based on a reliable VLT multiplication formula: Tint × Glass ÷ 100.
❓ Can I use this for home or office windows?
Absolutely. The tool is ideal for both automotive and architectural glass.
❓ What if I only have one value?
You’ll need at least two values to calculate the third.
Final Thoughts
Our Tint Percentage Calculator helps you get clarity—literally and mathematically—on how much light your tinted windows will allow. It simplifies the process, saves time, and helps you stay legal and stylish.
Whether you’re a driver, installer, or just curious, this tool ensures you get the right tint every time.
Try the calculator now and take the guesswork out of your next tint job!