TV & Monitor Viewing Distance Calculator
Find the optimal TV or monitor size for your viewing distance, or the distance for a given size, using THX and SMPTE viewing-angle guidelines plus 1080p/4K/8K
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What is TV & Monitor Viewing Distance Calculator?
A viewing distance calculator matches screen size to seating distance. It applies THX and SMPTE viewing-angle guidelines to 16:9 screens and adds pixel-visibility limits for 1080p, 4K and 8K panels, so you can go from couch distance to a recommended size range — or from a screen size to a seating plan.
Key Benefits
- Buy the right screen size for your room the first time
- Understand how much closer 4K and 8K let you sit than 1080p
- Avoid eye strain and wasted resolution with guideline-backed ranges
Common Use Cases
- •Choosing a TV size before a living-room or home-theater purchase
- •Laying out desk-to-monitor distance for a new workspace
- •Planning seating rows in a media room or presentation space
How to pick the right TV size
- Measure your seating distance: Pick the distance mode and enter how far your couch or desk sits from the screen, in meters.
- Choose the resolution: Select 1080p, 4K or 8K so the pixel-visibility limit matches the panel you plan to buy.
- Read the size range: Anything between the comfort minimum and the THX maximum works — pick based on budget and room aesthetics.
Key Features
- Two-way calculator: distance to size, or size to distance range
- THX 40°, SMPTE 30° and 20° comfort viewing-angle guidelines
- Pixel-visibility limits for 1080p, 4K and 8K via the 1-arcminute rule
- Results shown in inches with meters alongside
- Pure client-side math — no signup, no upload
Frequently Asked Questions
What viewing angle does THX recommend?
THX recommends a maximum viewing angle of about 40 degrees for an immersive theater-like experience. For a 16:9 screen that translates to a maximum seating distance of roughly 1.2 times the diagonal.
What is the SMPTE guideline?
SMPTE suggests a maximum viewing angle of 30 degrees, which most people find comfortable for mixed content like TV shows and sports. It corresponds to sitting at about 1.6 times the diagonal.
Why does resolution matter for viewing distance?
Closer seating makes individual pixels visible. Using the 1-arcminute limit of human visual acuity, a 1080p panel needs about 1.56× its diagonal in distance, 4K needs 0.78×, and 8K needs 0.39× — which is why 4K lets you sit twice as close as 1080p.
Is this calculator free?
Yes, it runs entirely in your browser with no signup, and all math is done offline on your device.