TV Size Calculator
Calculate the optimal TV size based on viewing distance. Determine the recommended screen size for comfortable viewing without eye strain.
How to Use This Calculator
- Measure your viewing distance in feet (from your seating position to where the TV will be).
- Select your TV\'s aspect ratio (16:9 is standard, 21:9 for ultrawide).
- The calculator displays the recommended TV size (35° viewing angle) plus minimum and maximum sizes for a comfortable range.
- Use these recommendations when shopping for a new TV to ensure optimal viewing comfort.
TV Size Formula
Optimal TV size is calculated based on viewing distance and desired viewing angle:
Example: At 10 feet (120") viewing distance with 35° angle and 16:9 ratio: Screen size = (120 × tan(17.5°) × 2) ÷ √(1 + (16/9)²) = (120 × 0.315 × 2) ÷ 1.95 = 38.8" ≈ 40" TV.
Full Description
Choosing the right TV size is crucial for an optimal viewing experience. Too small, and you\'ll miss details and lose immersion. Too large, and you may experience eye strain from having to scan the screen. The ideal size depends on your viewing distance and personal preference, but industry guidelines provide helpful recommendations.
THX (the audio/video certification company) recommends a 36° viewing angle for an immersive home theater experience, while SMPTE suggests 30° for general viewing. Most people find 30-40° comfortable. The calculator uses 35° as the optimal angle, providing a balance between immersion and comfort.
This calculator helps you determine the right TV size for your space. Enter your viewing distance and aspect ratio, and it shows the recommended size plus a range (30-40° viewing angles) to give you flexibility. Remember that personal preference matters—some people prefer larger screens for a more cinematic experience, while others prefer smaller screens for mixed-use rooms where the TV isn\'t always the focus.
Frequently Asked Questions
How do I determine the right TV size?
TV size depends on viewing distance and personal preference. THX recommends a 35° viewing angle, which means your TV diagonal should be approximately 0.84 times your viewing distance. For example, at 10 feet (120"), you'd want about a 100" TV.
What viewing angle is best?
THX recommends 36° for an immersive experience, while SMPTE suggests 30°. Most people find 30-40° comfortable. Smaller angles (20-30°) are better for mixed-use rooms, while larger angles (40°+) provide a more cinematic experience.
Does aspect ratio affect TV size choice?
Yes! Ultrawide TVs (21:9) appear larger at the same diagonal than standard 16:9 TVs because they're wider. A 65" 21:9 TV has more screen area than a 65" 16:9 TV. Consider both diagonal and aspect ratio when choosing.
Can a TV be too big?
Yes, if it's too large for your viewing distance, you may need to move your eyes/head to see the whole screen, causing eye strain. However, most people prefer larger TVs once they get used to them. The calculator shows a safe range.