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85” vs 100” TV

How the 85-inch and 100-inch sizes really compare — dimensions, ideal seating distance and how much extra screen you actually get.

85” 100”
85”
74.1×41.7” · sit 8.5–11.3 ft
vs
100”
87.2×49” · sit 10–13.3 ft
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Side-by-side specs

Diagonal85” vs 100” (+15”)
Screen width (16:9)74.1” vs 87.2”
Screen height (16:9)41.7” vs 49”
Relative picture area100” is ~38% bigger (1.38×)
Immersive distance (THX 40°)8.5 ft vs 10 ft
Relaxed distance (SMPTE 30°)11.3 ft vs 13.3 ft
Rule of thumb: screen area — not the diagonal number — is what your eyes notice. Jumping from 85” to 100” adds about 38% more picture.

TV wall mounts

A good mount puts the screen at the right height and lets you angle it away from glare. Match the mount's VESA pattern and weight rating to your TV, and use full-motion arms for wide or off-center rooms.

Full-motion (articulating) mountSwivel & tilt — best for corner or wide seatingLink coming soon
Tilting low-profile mountSits flush — ideal for above-eye-level placementLink coming soon
Fixed ultra-slim mountCheapest, thinnest — for perfectly-placed screensLink coming soon

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📐 Viewing Distance Calculator

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Frequently asked questions

Is a 100 inch TV much bigger than a 85 inch?

Yes. Diagonally it's 15” larger, but because screen area grows with the square of the diagonal, the 100” picture is about 38% bigger (1.38× the area) than the 85”. Side by side the difference is very noticeable.

How much farther should I sit from a 100 inch than a 85 inch TV?

For the same immersive THX view, plan about 8.5 ft for the 85” and 10 ft for the 100” — roughly 1.5 ft more.

Should I buy the 85 or the 100 inch TV?

If your seat is around 11.3–8.5 ft away, the 85” is comfortable; from 13.3 ft or more, step up to the 100”. When in doubt and the budget allows, most people prefer the larger screen — very few wish they'd bought smaller.

Will a 100 inch TV fit where a 85 inch was?

The 100” picture is about 87.2” wide vs 74.1” for the 85” — roughly 13.1” wider. Check your stand width and any recess before upgrading.

Compare other sizes

43” vs 50”43” vs 55”48” vs 55”50” vs 55”50” vs 60”55” vs 60”55” vs 65”55” vs 75”58” vs 65”60” vs 65”60” vs 70”65” vs 70”65” vs 75”65” vs 77”

Dimensions assume a 16:9 picture area. Distances use the THX (40°) and SMPTE (30°) standards. Last reviewed 2026-08-12.