Can you get tan through a window? Glass Explained

During the winter, many people like sitting in front of windows and experiencing the warm light that shines through them. If you’re one of them, you’re hoping to tan that way but also are curious if you can tan via a window. The second concern is whether you can enjoy the glass window while being protected from dangerous UV radiation.

Although you can obtain a tan through window glass, it is not the most incredible technique to attain your aim. Be aware that the good benefits of your enjoyment are dependent on the amount of time you spend in the sun and the kind of glass put in your windows. It is only sometimes worth your time. Let’s see what happens.

Can You Tan Through a Window?

Can You Tan Through a Window?

It is difficult that you will receive a tan via a closed window. However, it is primarily dependent on three factors:

  • The sort of window glass you have in your home
  • The duration of solar exposure on your skin
  • The intensity of the sun’s beams and the season

Be aware that most windows in most houses and workplaces prevent the majority of UV radiation, especially if they are:

  • UV-resistant coating
  • Thick double- or triple-paned windows

On the other hand, ordinary window glass in older homes provides less protection and allows you to brown during sun exposure. You should be aware that there are three types of UV radiation. Because UVC rays cannot reach the Earth’s surface, you need only be concerned about UVA and UVB. Both can cause skin harm in alternative ways. 

UVA rays penetrate deep into the epidermal layers and activate melanocytes, cells that generate the pigment melanin. It not only allows for tanning but it also:

  • Causes premature ageing
  • Causes wrinkles and sunspots
  • Weakens your immune system
  • Harms your DNA

UVB rays damage the cells in the top layers of the skin, causing sunburn.

How Long Does it Take to Tan Through a Window?

Many individuals need clarification on how much time they should spend in front of the window to achieve a tan. In most circumstances, you will notice the initial results within two to three hours, depending on a few parameters, such as:

How Long Does it Take to Tan Through a Window?

Skin color and type

Your skin type and color are essential determinants of how quickly you tan. Tanning from the window can help you the most when your skin is medium to fair brown. According to research, you will require around three hours to become tanned in this situation.

It will be nearly hard to tan via the glass if your skin is really white. Be advised that such skin is susceptible to UV rays and will most likely burn rather than tan. Because white skin is very resistant to UV radiation, you can’t expect to obtain a tan just by sitting in front of a window.


Because the strength of the sun fluctuates throughout the year, exposing your skin to UV rays in summer will result in a quicker tan. In certain circumstances, exposing your skin for an hour is sufficient to get the desired outcome. On the other hand, while UV rays are modest throughout the winter, even hours spent in front of the window will result in moderate tanning.

Glass Type

Because numerous varieties of glass are now available for windows, the chance of acquiring a tan will depend on which one you put in your home. A standard window glass, for example, absorbs 30% to 70% of UV radiation. As a result, you should expect to develop a tan after at least two hours of sun exposure, although this depends on the type of glass you use.

Ordinary glass filters practically all UVB rays only partially protect you from UVA rays. Double- and triple-glazed windows – It’s pointless to sit in front of these windows and expect to obtain a tan because they stop practically all rays from coming into your home or automobile.

Can you tan through a glass balcony?

Can you tan through a glass balcony?

It is possible to tan through a glass balcony, but it is very dependent on the type of glass and its UV radiation qualities. Standard window glass typically prevents the majority of the dangerous UVB rays that cause sunburn, but it may still enable some UVA rays to pass through. UVA rays contribute to skin ageing and tanning over time, although the process is slower and less potent than direct sun exposure outside.

On the other hand, some specialized glass coatings or treatments can be engineered to block a considerable amount of UVA and UVB radiation, giving improved protection. Even though sunbathing via glass is feasible, you should take measures, such as using sunscreen, to reduce the potential danger from UV rays.

Can you get vitamin D through a window?

Unfortunately, most windows obstruct UVB rays, which are responsible for vitamin D generation in the skin. When your skin is in direct contact with UVB rays, vitamin D, sometimes known as the “sunshine vitamin,” is absorbed. Simply put, the skin absorbs UVB rays. It causes cholesterol to be converted into vitamin D. As a result, direct skin contact with the sun is the most significant way to get vitamin D from sunshine and reap its advantages.

To maximize vitamin D production, doctors recommend exposing at least one-third of your skin (for example, by wearing shorts and a tank top) to direct sunshine for 10 to 30 minutes three times a week. However, persons with darker skin may require substantially more extended time in the sun than those with lighter skin to create the same quantity of vitamin D.

This is due to darker skin’s increased melanin concentration, which limits the skin’s absorption of UVB rays. As a result, those with darker skin may need to spend an extra 30 minutes to 3 hours in the sun to get enough vitamin D. Regardless of skin tone. It is critical to emphasize that sunscreen should be used liberally. Individuals with darker skin might also be sunburned and get skin cancer. Furthermore, applying sunscreen will not interfere with vitamin D production. You will still absorb enough rays to stimulate vitamin D synthesis. It’s always a good idea to include vitamin D-rich foods in your diet since they can help improve your vitamin D levels.


Can you tan through a window? The quick answer is yes, but there are several important variables to consider. The sun’s UV radiation is classified into two types: UVA and UVB. UVA photons are long-wave rays that may penetrate deeper into the skin, whereas UVB rays are short-wave rays that cause sunburn on the skin’s outer layers. UVB rays are responsible for tanning, but they also do other things. They can induce sunburns and raise the risk of skin cancer considerably.

Most home and automobile windows filter most UVB rays, but not all UVA rays. A large percentage of the UVA rays are still reaching you when you’re sitting near a window. This can also happen even if you’re not acquiring a tan. This may give you a false feeling of security while sitting near a window, thinking you’re safe from the sun’s damaging rays. Long-term UVA ray exposure, even if there are no apparent symptoms of tan, can harm your skin’s health.

While you can tan through a window, it could be better or encouraged. Tanning via a window exposes you broadly to UVA radiation. It can cause skin damage while not giving the desired tan. If you want to tan, do it outside with adequate sun protection. For example, you use sunscreen with a high SPF and reapply as needed. Always take care of your skin and prioritise your health over a quick tan.