TV Mounting Height Calculator

Find the recommended wall-mount height for your TV by centering the screen on your seated eye level, based on screen size, aspect ratio, and eye height from the floor.

Quick Facts

Eye-level convention
Center the screen at seated eye height
The common recommendation used by mount makers and home-theater installers for a comfortable, level line of sight.
16:9 screen height
Diagonal x 0.4903
From the Pythagorean relationship between a 16:9 rectangle's width, height, and diagonal.

Your Results

Calculated
Screen height
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Physical height of the display
Screen center height
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Target: aligned to seated eye level
Bottom of TV, from floor
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Lower edge mounting height
Top of TV, from floor
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Upper edge mounting height

Ready

Enter your TV size, aspect ratio, and seated eye height, then press Calculate.

About the TV Mounting Height Calculator

This calculator finds the recommended wall-mount height for a TV using the standard eye-level centering convention followed by mount manufacturers and home-theater installers: the vertical center of the screen should land at your seated eye height, so you look straight ahead at the middle of the picture instead of tilting your neck up or down.

The formula

Two steps produce the recommendation:

  • Screen height from diagonal size. TVs are sized by their diagonal measurement, not their height. For a 16:9 widescreen, physical screen height = diagonal x 9 / sqrt(16² + 9²) = diagonal x 0.4903. A 21:9 ultrawide uses 9 / sqrt(21² + 9²) = 0.3939, and an older 4:3 set uses 3 / 5 = 0.6. These multipliers come directly from the Pythagorean theorem applied to each aspect ratio's rectangle.
  • Center the screen on eye level. With screen height known, set screen center height = seated eye height. Then bottom of TV height = eye height − screen height / 2, and top of TV height = eye height + screen height / 2.

What "seated eye height" means

Measure from the floor to the middle of your eyes while sitting normally in your usual viewing spot, looking straight ahead. For a typical sofa with a standard cushion height, this commonly lands around 42 inches (about 107 cm), but taller or lower seating, reclined postures, and stools all shift the number — measuring your own setup gives a more accurate mount height than assuming a default.

Mounting above furniture

When a TV sits above a media console, dresser, or fireplace, the calculated bottom height needs to clear the top of that furniture with a few inches to spare. If eye-level centering would place the screen too low for the furniture underneath it, the mount typically has to go higher than ideal — a tilting mount angled a few degrees downward can partly compensate for the resulting upward gaze.

Practical context

This formula gives a solid starting point for most living rooms and bedrooms. Viewing distance, screen glare from windows, and multiple seating positions at different heights can all justify nudging the final number up or down a few inches — measure twice before drilling into a wall.

Frequently Asked Questions

What is the standard formula for TV mounting height?
The widely used convention centers the TV screen on your seated eye level. First find the screen's physical height from its diagonal size and aspect ratio, then set the mount so the vertical center of the screen sits at that eye height. Bottom height equals eye height minus half the screen height, and top height equals eye height plus half the screen height.
What seated eye height should I use?
For a standard sofa with a typical cushion height, seated eye level is commonly around 42 inches (about 107 cm) from the floor. This varies with your specific seating and posture, so measure your own setup by sitting normally and measuring from the floor to eye level for the most accurate result.
How do I find the screen height from the TV size?
TV sizes are advertised as the diagonal measurement. For a 16:9 widescreen TV, physical screen height equals the diagonal multiplied by about 0.4903 (derived from the Pythagorean relationship between a 16:9 rectangle's width, height, and diagonal). Other aspect ratios like 21:9 or 4:3 use the same geometry with a different multiplier.
Should I mount lower if the TV sits above furniture?
If the calculated bottom height would sit at or below the top of a stand, console, or fireplace, you generally need to raise the TV above that furniture with a few inches of clearance, which pushes the screen center above ideal eye level. In that case, a tilting mount angled downward can help compensate.

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