40" vs 55" Inch TV
Size Comparison

The jump from 40" to 55" is one of the most common TV upgrades people consider — and for good reason. The 55-inch screen delivers 89.1% more viewing area than the 40-inch, which means you're getting significantly more screen for your money. In physical terms, the 55" is 13.1 inches wider and 7.4 inches taller. That's not a subtle difference — it's immediately noticeable from across the room.

Exact Measurements

The 40-inch TV measures 34.86" wide × 19.61" tall (88.55 × 49.81 cm), with a total screen area of 683.68 square inches. The 55-inch TV measures 47.94" wide × 26.96" tall (121.76 × 68.49 cm), with a total screen area of 1292.58 square inches. That's a difference of 608.9 square inches — roughly 89.1% more screen.

Recommended Viewing Distance

For a 40-inch TV, you'll want to sit between 4 and 6.7 feet away (ideal: about 5.3 feet). For the 55-inch, the sweet spot is 5.5 to 9.2 feet (ideal: about 7.3 feet). If your couch is closer than 5.5 feet to the wall, the 55" might feel overwhelming — the 40" could actually be the better pick for your space.

Room Size

A 40" TV works well in a bedroom, office, or small apartment living room. The 55" is better suited for a medium to large living room. Measure your actual viewing distance before deciding — the "right" size is the one that fits your room, not the biggest one that fits your budget.

When to Choose the 40"

• Bedroom or guest room
• Office or studio apartment
• Gaming at a desk or close range
• Your viewing distance is under 6.7 feet

When to Choose the 55"

• Most living rooms with 7–9 feet of viewing distance
• Apartment living where 65″ feels too dominant
• Solid all-around choice for mixed use
• Your viewing distance is 5.5 feet or more

What About Sizes In Between?

If 55" feels like too big a jump, consider the 43" or the 50" as a middle ground. See our comparisons: 40 vs 43" or 43 vs 55", 40 vs 50" or 50 vs 55".