How to Measure with iPhone: A Step-by-Step Guide

Need to measure something but don’t have a ruler or tape measure handy? No problem! Your iPhone has got you covered with its built-in measuring tool. Let’s dive into how you can use your iPhone to measure objects quickly and accurately.

Step by Step Tutorial: How to Measure with iPhone

Before we get started, ensure that you have the latest iOS version installed on your iPhone for the best performance of the measuring app.

Step 1: Open the Measure App

Launch the Measure app on your iPhone. You’ll find it pre-installed on your device.

The Measure app uses augmented reality (AR) to turn your iPhone into a tape measure. When you open the app, you’ll be prompted to move your phone around so that it can calibrate and get a sense of the space around you.

Step 2: Point Your Camera

Point your iPhone’s camera at the object you want to measure.

Make sure the entire object fits within the screen, and the app will automatically detect the edges of the object and provide a measurement. For larger objects, you might need to move further back.

Step 3: Tap and Drag to Measure

Tap the + button to start measuring, then slowly move your iPhone to the end of the object and press the + button again.

The app will display a line with the measured distance. It’s important to move your phone steadily for an accurate measurement.

Step 4: Save or Take a Photo

Once you’ve got your measurement, you can save it or take a photo by tapping on the shutter button.

This feature is handy if you need to remember or share the measurement later. Just look for the saved photos in your camera roll.

After completing the measurement, you can easily share the results with friends or family, or save it for future reference. It’s a convenient way to get accurate measurements without needing any additional tools.

Tips: How to Measure with iPhone

  • Ensure good lighting conditions to help the app detect the object’s edges more accurately.
  • For best results, use the Measure app on flat surfaces.
  • Hold your iPhone steady while measuring to avoid errors.
  • Use the level feature within the app to check if the surface is flat.
  • If the app is having trouble detecting the object, try moving closer or further away.

Frequently Asked Questions

What iPhone models can use the Measure app?

The Measure app is available on iPhone models 6s and later that run iOS 12 or later.

The app relies on ARKit, which is supported by these iPhone models and allows for the augmented reality features to function properly.

Can I measure the height of an object with my iPhone?

Yes, you can measure the height of an object by selecting the height measurement option in the app.

The app will guide you through the process of measuring the height by having you point at the base and the top of the object.

How accurate is the Measure app on the iPhone?

The Measure app is quite accurate, but it’s not as precise as a physical tape measure or ruler.

It’s great for quick estimates or when you don’t have a traditional measuring tool at hand. For precise measurements, it’s still recommended to use a physical tool.

Can the Measure app measure in different units?

Yes, the Measure app can display measurements in both inches and centimeters.

You can change the units in the app’s settings, depending on your preference or the standard unit of measurement in your region.

What surfaces can I measure with the Measure app?

You can measure almost any surface with the Measure app, as long as it’s well-defined and well-lit.

However, transparent or highly reflective surfaces may cause some difficulties for the app in detecting edges.


  1. Open the Measure app on your iPhone.
  2. Point your iPhone’s camera at the object you want to measure.
  3. Tap and drag to measure the object.
  4. Save or take a photo of the measurement if needed.


Measuring objects has never been easier, thanks to the handy Measure app on your iPhone. With a few taps and a bit of AR magic, you can quickly get the measurements you need without fumbling for a ruler or tape measure. Whether you’re hanging pictures, buying furniture, or just satisfying your curiosity, the Measure app is a convenient tool that’s always at your fingertips.

Remember, while the app is quite accurate, it’s not a replacement for professional tools required for precise measurements. However, for everyday use and quick estimates, it’s incredibly useful. Give it a try next time you find yourself needing to measure something, and you’ll be impressed by what your iPhone can do. Happy measuring!

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