I did this but I chat remember the exact numbers. The calculation is pretty close. The tint shop should be able to show you if you ask. They have a light meter they can measure the window and slip on different tints to see % change and decide which you want.Has anyone measured their window with tint meter afterwards?
I know that you are suppose to multiply factory tint, which I think it is 74% by the tint you got like 20%.
But I was told that the actual number does not come out like that.
So can you tell me what the tint meter said after you put on what percentage tint?(would be helpful if you told me the brand name, too)
I am trying to stay within my state law.
Should I have them cut around the 3rd brake light in rear window?I did this but I chat remember the exact numbers. The calculation is pretty close. The tint shop should be able to show you if you ask. They have a light meter they can measure the window and slip on different tints to see % change and decide which you want.
yeah I know how to calculate the percentages. my question to you is, did you actually measure the VLT using a meter?It should be pretty easy to calculate the percentage of light that still gets through.
Follow along: the civic has 70% tint from factory.
I got my back windows tinted with 5% tint. That means they allow 5% of the light through. But my windows are already tinted 70% so this means that in total after tinting, my windows will allow only 5% of the 70% into the car.
So to calculate how much total light comes through you multiply 5% by 70% or said another way:
.05x.7=.035 which means although my back window tint is 5%, because of the factory 70% tint, only 3.5% of total light enters my back windows.
35% in front windows is still playing it safe?35% Front Windows & 25% Back Windows using 3M Film. I originally wanted the same tint all around, but front tints are illegal in CA. And the cops around my area are always bored and pulling people over for their tints so I decided to play it safe. Paid $280. Most places in SF charge $300+