Screen Size Calculator: How Much Bigger Is It Really?

You're comparing two screens — maybe a 55" TV vs a 65" TV, or a 6.1" phone vs a 6.7" phone. The diagonal numbers tell you something, but they don't tell you the whole story. A 65" TV isn't just 18% bigger than a 55" — it gives you 40% more screen area. That's the power of our screen size calculator: it shows you the real, mathematically accurate difference between any two displays so you can make confident buying decisions.

Try it yourself: compare any two screen sizes free on Easy Compare — enter the diagonal sizes and aspect ratios, and see the exact area difference at true scale.

How Screen Size Calculation Works

Screen sizes are measured diagonally, corner to corner. But the actual viewing area depends on two things: the diagonal measurement and the aspect ratio. Most modern screens use one of these ratios:

• 16:9 — Standard widescreen (most TVs, monitors, laptops)
• 16:10 — Taller widescreen (MacBooks, some productivity monitors)
• 19.5:9 — Modern phone aspect ratio (tall and narrow)
• 21:9 — Ultrawide monitors and some phones
• 4:3 — Older standard (iPads, legacy monitors)

The key insight: screen area scales with the square of the diagonal. This means every extra inch adds more area than the last. Going from 27" to 32" adds 97 sq in, but going from 55" to 65" adds 516 sq in — even though both are "5 inches more" in a sense.

Screen Area Comparison Table (16:9)

Here's how much actual screen area you get at each common size. All measurements assume a 16:9 widescreen panel:

Common Screen Size Comparisons People Search For

Based on millions of screen comparisons made on Easy Compare, here are the most popular size matchups and the real differences:

• 6.7" vs 6.9" phone: The 6.9" screen gives you ~6% more area. Noticeable in media and gaming, but barely different in your pocket.
• 6.1" vs 6.7" phone: A ~21% area difference. The 6.7" is significantly better for reading, video, and multitasking.
• 27" vs 32" monitor: ~40% more area. The 32" is a serious upgrade for productivity — two full windows side by side becomes effortless.
• 55" vs 65" TV: ~40% more area. The single biggest upgrade most people can make to their living room.
• 65" vs 75" TV: ~33% more area. Worth it for dedicated home theater rooms with 10+ ft viewing distance.

How to Use a Screen Size Calculator

Using our free screen comparison tool is the fastest way to see the real difference between two screens:

1. Enter both screen sizes — type the diagonal measurement (e.g., 55 and 65) for each screen.
2. Select the aspect ratio — most TVs and monitors are 16:9, most modern laptops are 16:10, most phones are 19.5:9 or 20:9.
3. See the visual overlay — both screens are rendered at true scale so you can see exactly how they compare.
4. Read the area difference — the tool calculates exact screen area and shows you the percentage difference.

This takes the guesswork out of screen shopping. Instead of wondering "is it worth the upgrade?", you can see the exact difference in seconds.

The Math Behind Screen Area

For those who want to calculate it themselves, here's the formula for any rectangular screen:

The key takeaway: screen area is proportional to the diagonal squared. This is why a 65" TV feels way bigger than a 55" — not just "10 inches bigger" but nearly 40% more viewing area.

Phone Screen Area vs Tablet vs Laptop vs TV

Here's how screen area scales across device categories. The jumps between categories are enormous:

Ready to compare your specific screens? Open the free screen size calculator → — enter any two sizes and see the exact difference instantly. For more screen comparisons, check out our guides on choosing the right TV size and the best monitor size for your work.