TV Size Calculator

What size TV do I need?

Answer a few quick questions and we'll match you with a TV from our range, using Bi-Rite's own viewing distance guide. Takes under 30 seconds.

Find the perfect TV to fit your room

1
m
2What you watch most
3Your room
Your recommendation

You need a 65" TV

Good range58–75"
Recommended65"
Screen 144 × 81 cm· Sit at least 2.0 m away

TVs that fit your room

Before you buy: check where it will go

  • On a cabinet: the cabinet should be wider than the TV's stand and deep enough for its feet. Check the TV's width, depth and weight in the product specs.
  • On the wall: mount it so the centre of the screen is at eye level when you're sitting, always fix into studs, and check the bracket's weight limit. See wall mounts.

TV size guide by viewing distance

Bi-Rite's recommended viewing distance for 4K Ultra HD TVs, based on a 30° viewing angle (the most comfortable). For Full HD or HD, go one size smaller.

TV size Sit this far away
24"–40" Under 1.70 m (secondary rooms)
43" 1.70 m – 1.85 m
50" 1.85 m – 2.10 m
55"–58" 2.10 m – 2.45 m
65" 2.45 m – 2.80 m
70"–75" 2.80 m – 3.30 m
85" 3.30 m – 3.70 m
100" 4.00 m – 4.50 m
Quick check: TV size in inches × 1.2 = the closest you should sit. A 75" TV × 1.2 = 90 inches, or about 2.3 m.

Before you buy, measure these

TV sizes are measured corner to corner and only count the screen, not the frame or stand. Check the product's specifications for the full width, height, depth and weight.

Wall space

Check the width and height you have. A big TV may not fit between windows or next to a doorway.

Cabinet size

Your cabinet should be wider than the TV's base. Measure its depth too, so the stand feet fit.

Viewing angle

Mark where the middle of the TV will be, then sit where you'd watch. The centre should be at eye level.

Power point

Make sure there's a power point close by. If not, plan how you'll hide the cables.

How we work it out

No lab maths, just Bi-Rite's own viewing guide and a few honest adjustments for how you'll use it.

1. Distance sets the size

We start with how far you sit from the screen and match it to Bi-Rite's own viewing guide, which is built around the most comfortable viewing angle for most people.

2. How you watch fine-tunes it

Movies, sport and media rooms nudge the size up. Bedrooms nudge it down. Your answers only change the size, not which TVs we show.

3. We check it fits

We make sure you're not sitting too close for the size, and that the TV fits the space you gave us. Then we show the TVs in our range that match.

TV size FAQs

What size TV should I get?

The right size depends on how far you sit from the screen. If your couch is 2.5 to 3 m from the TV, a 65 to 75 inch screen will suit. Enter your distance into our calculator for an exact recommendation.

What size TV do I need for my viewing distance?

Match your viewing distance to Bi-Rite’s viewing guide below. As a check, multiply the TV size in inches by 1.2 to get the closest you should sit, for example 75 inches × 1.2 = 90 inches (2.3 m). At 3 m, that means a 70 to 75 inch screen is a good fit.

Viewing distance Recommended TV size
2 m 50 inch
2.5 m 65 inch
3 m 70 to 75 inch
3.5 m 85 inch or larger

These sizes assume a 4K TV. Measure from the front of your couch cushion to the screen.

What is the best viewing distance for a TV?

For a 4K TV, Bi-Rite’s viewing guide is based on a 30 degree viewing angle, which is the most comfortable for most people. For a 65 inch TV, that’s 2.45 to 2.8 m. The 30 degree angle comes from SMPTE, the film and TV engineering body. THX recommends about 40 degrees for a cinema feel, so sitting a little closer is fine if you want a more immersive picture.

TV size Viewing distance
43 inch 1.70 to 1.85 m
50 inch 1.85 to 2.10 m
55 to 58 inch 2.10 to 2.45 m
65 inch 2.45 to 2.80 m
70 to 75 inch 2.80 to 3.30 m
85 inch 3.30 to 3.70 m
100 inch 4.00 to 4.50 m
How big is a 65 inch TV?

A 65 inch TV screen is about 144 cm wide and 81 cm high, with a diagonal of 165 cm. Add 1 to 3 cm for the frame, depending on the model. Here’s how other common sizes compare.

Size Diagonal Width Height
32 inch 81 cm 71 cm 40 cm
40 inch 102 cm 89 cm 50 cm
50 inch 127 cm 111 cm 62 cm
55 inch 140 cm 122 cm 69 cm
65 inch 165 cm 144 cm 81 cm
75 inch 191 cm 166 cm 93 cm
85 inch 216 cm 188 cm 106 cm

These are screen sizes only. Check the spec sheet for the full size with the stand attached.

How wide is a 75 inch TV?

A 75 inch TV screen is about 166 cm wide, or 167 to 170 cm including the frame. If it’s going into a recess or between two shelves, measure that gap first and leave a few centimetres spare for airflow.

How do you measure TV size?

Measure a TV screen diagonally, from the top-left corner to the bottom-right corner of the picture area. It does not include the stand, bezel or any other part of the TV. TVs are sold in inches, so a 65 inch TV has a screen that measures 65 inches, or 165 cm, from corner to corner. It does not mean the TV is 65 inches wide.

How many centimetres is a 55 inch TV?

A 55 inch TV is 139.7 cm measured diagonally. To convert any TV size, multiply the inches by 2.54. The screen itself is about 122 cm wide and 69 cm high.

Not sure? See them in person.

Pop into your local Bi-Rite store to compare sizes side by side. We'll give you honest advice, even if that means the cheaper model.

Find a store

This calculator is a guide. It uses Bi-Rite's recommended viewing distances for 4K TVs and adjusts for what you watch and your room. Seating height, eyesight and personal taste matter too, so please check the product specifications for exact sizes, or see the TVs in store. Prices and availability can change.