Measure diagonally from corner to corner – that’s how you find what size is my monitor. The number you get in inches is your screen size, and it’s the standard way everyone measures.
I get this question a lot from friends. They look at their screen and just guess. But there’s a right way to do it.
I’ve measured dozens of monitors over the years. It’s a simple task once you know the trick.
This guide will show you the easy steps. You’ll know your exact screen size in no time.
Why Knowing Your Monitor Size Matters
You might think size doesn’t matter much. But it affects your daily computer use a lot.
A bigger screen gives you more room. You can open more windows side by side. It’s great for work or watching movies.
A smaller screen saves desk space. It’s also easier to move around if you need to. I like smaller screens for tight spots.
When you buy a new monitor, you need to know your current size. This helps you decide if you want the same or something different.
Wall mounts and monitor arms need the right size too. If you know what size is my monitor, you can buy the right mount. It saves you from returns and headaches.
Game settings and software sometimes ask for your screen size. Knowing the answer makes setup faster. You won’t have to guess and check.
The Right Way to Measure Your Monitor
Grab a tape measure. A soft one works best so you don’t scratch the screen.
Place the end at the bottom left corner of the screen. Only measure the screen itself, not the plastic frame around it.
Stretch the tape to the top right corner. Read the number where it lands. That’s your screen size in inches.
Most stores list monitor sizes in inches. So if you measure 24 inches, you have a 24-inch monitor. It’s that simple.
Write the number down. You’ll need it for the next steps. I keep a note on my phone for all my tech sizes.
If you don’t have a tape measure, use a ruler and string. Mark the string, then measure it. It’s a handy trick I’ve used before.
Check Your Computer’s Settings
Your computer might already know the answer. Go to your display settings to look.
On Windows, right-click your desktop. Choose “Display settings.” Look for “Display resolution” info. It might list your monitor model.
On a Mac, click the Apple menu. Go to “About This Mac,” then “Displays.” You’ll see your screen details there.
The settings often show the model number. You can search this number online. The manufacturer’s website will tell you the exact size.
This method is good if you can’t measure physically. Maybe your monitor is mounted high on a wall. Using software is easier in that case.
I use this trick for my work monitors. They’re bolted to arms, so measuring is hard. The settings give me the info I need fast.
Look at the Model Number
Flip your monitor over. Look for a sticker on the back. It has the model number printed on it.
The model number often includes the size. For example, “S24F350” might mean a 24-inch screen. The number 24 is right there in the name.
Write down the full model number. Type it into a search engine. Add “specifications” to your search.
The official specs page will list the screen size. It will also tell you other useful things. You’ll learn about resolution and ports.
I did this for my old Dell monitor. The sticker was faded, but I could still read it. The search told me it was a 27-inch model.
This is the most sure way to know. The manufacturer’s info is always correct. You won’t second-guess your tape measure skills.
Common Monitor Sizes Explained
Monitors come in standard sizes. Knowing them helps you understand your own screen.
Small monitors are 19 to 22 inches. They’re good for basic office work. You see them in schools and call centers a lot.
Medium sizes range from 24 to 27 inches. This is the sweet spot for most people. It’s my favorite size for gaming and daily use.
Large monitors are 32 inches and up. They feel like small TVs on your desk. These are great for designers and video editors.
Ultrawide monitors have a different shape. They are much wider than they are tall. Their size is still measured diagonally, though.
When you ask “what size is my monitor,” you’re finding where you fit. Compare your measurement to these common ranges. You’ll see what category your screen falls into.
The ViewSonic website has a good guide on sizes. It shows how each size works for different tasks.
Screen Size vs. Resolution
Size and resolution are not the same thing. This confuses a lot of people.
Size is the physical measurement. It’s how big the screen is from corner to corner. You measure this with a tape.
Resolution is about pixels. It’s how many tiny dots make up the image. More pixels mean a sharper picture.
A 24-inch monitor can have different resolutions. It could be 1920×1080 or 2560×1440. The size stays the same, but the detail changes.
When you find out what size is my monitor, you know the physical space. You still need to check resolution for clarity. Both numbers matter for your experience.
The Dell support site explains this difference well. They show how size and resolution work together.
Measuring for a Monitor Upgrade
Thinking of getting a bigger screen? Your current size helps you plan.
Measure your desk space first. See how much room you have. A bigger monitor needs more depth on your desk.
Know what size is my monitor now. Then decide how much bigger you want to go. Jumping from 24 to 27 inches is a nice upgrade.
Consider your viewing distance too. If you sit close, a huge screen might strain your eyes. I made this mistake once and had to move my desk back.
Check if your computer can handle a bigger screen. Older graphics cards might struggle. You don’t want a beautiful new monitor that runs slow.
Write down your current size and your desired size. Take this list when you shop. It keeps you focused on what you really need.
Tools to Help You Measure
You don’t need fancy tools. Basic items from around the house work fine.
A sewing tape measure is perfect. It’s soft and flexible. You can bend it across the screen corners easily.
A standard metal tape measure works too. Just be careful not to tap the screen. Place it gently to avoid scratches.
No tape measure? Use a piece of string. Stretch it across the diagonal. Mark where the corners are with your fingers.
Lay the string against a ruler or yardstick. Measure between your marks. Now you know what size is my monitor without special tools.
There are also smartphone apps. They use your phone’s camera to measure. I find these less reliable than physical tools, though.
The National Institute of Standards and Technology says standard tools are best. They give you the most accurate results for physical measurements.
What If My Monitor Is Curved?
Curved screens measure the same way. You still go from corner to corner.
Don’t try to follow the curve with your tape. That will give you a wrong number. Just go straight across the diagonal.
The curve doesn’t change the screen size. It changes how the image wraps around you. But the size number is still a straight line.
When you ask “what size is my monitor” for a curved one, use the flat measurement. Manufacturers list the flat diagonal size, not the curved length.
My gaming monitor is curved. I measured it straight across and got 34 inches. The specs sheet confirmed I was right.
Curved monitors often come in ultrawide sizes. They are wider than normal screens. The diagonal measurement helps compare them to flat screens.
Understanding Aspect Ratio
Aspect ratio is the shape of your screen. It’s the width compared to the height.
Most monitors are 16:9. This means 16 units wide for every 9 units tall. It’s the standard for TVs and computers.
Some are 16:10 or 21:9. These are less common. They give you more vertical or horizontal space.
When you measure what size is my monitor, the aspect ratio doesn’t change the diagonal. A 24-inch 16:9 and a 24-inch 21:9 are the same diagonal length.
But the screens will look different. The 21:9 will be much wider. It’s like a cinema screen on your desk.
The HP support pages have charts showing different aspect ratios. You can see how the same diagonal size can look different.
Frequently Asked Questions
What size is my monitor if I don’t have a tape measure?
Check your computer’s display settings. Look for the monitor model number there. Search that number online to find the size.
Do I measure the monitor with the frame or without?
Measure just the screen area. Do not include the plastic border around it. The frame doesn’t count toward the display size.
What size is my monitor for gaming?
Most gamers use 24 to 27 inch monitors. This size gives good detail without needing to move your head too much. It’s a sweet spot for seeing the whole game.
How do I measure a laptop screen?
Use the same diagonal method. Measure from one corner of the screen to the opposite corner. Laptop sizes are usually between 13 and 17 inches.
What size is my monitor for photo editing?
Photo editors often use 27 inch or larger monitors. Bigger screens show more detail. They also help with having editing tools open next to your photo.
Does resolution affect how I measure?
No, resolution doesn’t change the physical size. A 4K monitor and an HD monitor can both be 27 inches. You measure them the exact same way.
Conclusion
So what size is my monitor? Now you know how to find out. Grab a tape measure and check diagonally.
Remember to measure just the screen. Use the model number if you can’t measure. Your computer settings can help too.
Knowing your size helps with upgrades and accessories. It makes your tech life easier. Go measure your screen right now.