Limit File Size To K Lightroom

By | 28/08/2022

One post-processing trick you should know is how to resize an image in Adobe Lightroom. It’s both like shooting fish in a barrel to acquire and useful.
In this article, I’ll show you everything you need to know about resizing images in Lightroom.
A smartphone opened on gallery, laying on a printed photo resized in Lightroom

A annotation earlier we get-go. I’g using Lightroom v. If you’re using a different software version, your screen might look unlike. Simply the resizing process is the aforementioned.

What Practise Pixels Have to Do With Resizing Photos

A pixel is the smallest piece of data that makes upward a digital image. In fact, your photos are a lot of pixels arranged in a specific order.
When you enlarge a photo enough, y’all can actually see the pixels equally little squares.

Screenshot of a photo enlarged 11 times using the zoom - how to resize image in lightroom
This image was enlarged 11 times using the zoom in Lightroom (marked with the pinkish arrow)

Most cameras these days capture images with a huge amount of pixels (millions!).
The number of pixels in a photograph also depends on the photographic camera model and the amount of pixels in the sensor.
A close up photo of a gate, overlayed with text giving information on pixels - resizing in lightroom

Having a lot of pixels is not bad when you’re working with large prints. It allows yous to have precipitous images.
But more pixels also mean more data on the file of the photo. This causes the file size of your photos to exist big.
The problem with having big files is that they make websites heavy and slow. And social media platforms don’t accept them.
You tin solve this problem by resizing your images in Lightroom. But kickoff you need to know how many pixels your image has.

How to Check Pixel Dimensions in Lightroom

Once your image is imported into Lightroom, you can check this easily. In the Library module, select the image in the Loupe mode (by clicking in its thumbnail).
If yous press the shortcut “I” on your keyword, you will showtime a bike of information overview. The first fourth dimension you printing “I”, the file name, the appointment and time you took the photo also as the pixel dimensions volition announced.
Pixel dimensions are shown in width and height format (white arrow in the epitome below).
Screenshot of how to resize an image in Lightroom

Press ‘I” again. Now you can access to some of your image settings such equally aperture, shutter speed, focal length etc.
In order to exit from the information overview, just printing “I” one last time.
Screenshot of how to resize an image in Lightroom

Resizing Photos in Lightroom – the Workflow

In Lightroom, you can resize your images when y’all export them. To do so, get to the Grid mode of the Library module (by pressing the shortcut “K”). Select the prototype or images yous want to resize.
Screenshot of opening the image library in Lightroom - resize photos

To select images, click on their thumbnail while pressing Ctrl (or Cmd if you’re using a Mac).
Screenshot of selecting multiple images in lightroom

If the images are adjacent to each other, click on the first one then select the terminal i using Shift+Ctrl+click (Shift+Cmd+click on a Mac).
Screenshot of selecting multiple images in lightroom

In one case you have selected all the images you want to resize, open the Lightroom Export dialog. Click on the “Export” button.
The panel shows several options for the consign, including export location, file naming, metadata and watermarking. If y’all want, you lot can give your images custom names here.
Today we will focus on the “Epitome size” office, just under File Settings.
Screenshot of resizing images in lightroom

In this panel yous tin can also select the resolution of your image and consign it. This pick does non involve resizing.
The terminal image volition have the same amount of pixels as the original. Its size in inches/cm will depend on the resolution.
Screenshot of selecting image resolution in lightroom

Resizing an Image in Lightroom According to Width & Acme

To resize your prototype, yous need to select the “Resize to Fit” box.
If y’all don’t need to enlarge the photograph, check the box “Don’t overstate” to make sure that Lightroom won’t practice it. Retrieve that enlarging e’er decreases the image quality.
In the drop-downward menu y’all tin cull between several resizing options. The first ane is “Weight & Height”.
Screenshot of resizing an image in lightroom according to width and height

Here you can choose the width (W) and height (H). In the drop-downwards bill of fare y’all tin choose to use pixels, inches or centimetres.
Lightroom will fit the photo to its dimensions as all-time it tin. The concluding image might not be exactly the size yous introduced.

Resizing an Image in Lightroom Using the Dimension Settings

“Dimension” is the second option in the resizing drop-downward menu. Information technology is quite like to the Width and Height i. But this time you write down the measures of the long and short edges of your images instead of Width and Elevation.
This choice is actually useful when batch resizing landscape and portrait photos. Lightroom will ignore the width and length and instead will observe its curt and long edges.
Screenshot of resizing an image in lightroom using dimension settings

Resize to Fit the Long Edge or Short Edge

If you are concerned virtually the size of ane of the edges in your prototype, the all-time resizing options are the Resize to Fit.
You can either resize to fit the long border or the short edge in your paradigm.
Screenshot of how to resize an image in Lightroom

Screenshot of how to resize an image in Lightroom with short edge

Input the length you demand and Lightroom will calculate the other side to go on the photos proportionate.
This is the option that I use the most.

Resizing Using the Megapixels Option

This is really useful if yous have a file size limitation and you lot don’t intendance much nigh the pixel length of the edges in your image.
This happens usually when yous are submitting images to competitions or to certain websites. They’re likely to specify a size limit in their guidelines.
To use the megapixels option, you lot just need to write the file size you demand and its resolution and Lightroom will resize it accordingly!
Screenshot of how to resize an image in Lightroom using the megapixels option

How to Decide on the Pixel Dimensions You Need

Now y’all know your resizing options, but how do you determine what pixel size you need?
Websites and social media platforms accept particular epitome sizes. It is always a good thought to check these and resize your images accordingly.
I found it really useful to check on the web for social media cheat sheets. These collect information from the most common social media platforms.
For example, Instagram image sizes correct now are 1080×1080 pixels for foursquare photos, 1080×1350 pixels for portrait photos and 1080×566 pixels for landscape ones.
Take into business relationship that you lot can’t add pixels to an image. Brand sure that the new dimensions are smaller than the those of the original photo.

How to Cull the Correct Resolution

Now that you know about the pixel dimensions, you demand to decide on the paradigm resolution.
Resolution is the number of pixels than an prototype has in a sure infinite. It is too known as the pixel density and information technology is usually measured in pixels per inch (ppi).
A 72ppi image will have 72 pixels in each inch. A 300ppi epitome volition have 300 pixels each inch and and so on.
Images with college resolution are sharper but their files are bigger. For that reason, high resolution images are kept for printing. They are non the all-time option for websites and social media platforms.
Then your resolution depends how you lot plan to use the photograph: digital or print?
A resized photo of autumn leaves beside a smartphone

The Best Resolution for Digital Images

It is agreed that 72ppi is a good resolution for websites and social media photos. This is the resolution of most of screens.
It’s still a modest enough resolution that websites tin load the images fast and smoothly.
Even so, at that place are screens with 100ppi and even 150ppi. If yous prefer to use these resolutions instead, the loading speed of your website will exist slower.
It’s upwards to you to decide what is more of import: higher resolution or higher speed.

The Best Resolution for Prints

If you are going to print your image it will demand to have a higher resolution than for a website. For example, this could exist 300ppi.
If yous desire to print your photo on a sail, a lower resolution like 150ppi will be good enough. The pixel dimensions of your photo together with your resolution will decide the size in inches/cm of your final printed photo.
If the original photo has 4874 pixels in the long side and I want to print it at a resolution of 300 pixels per inch, doing the math will give a concluding print of sixteen.25 inches long.
An image of three green doors, overlayed with information about the amount of pixels involved - resize image in Lightroom


Resizing is always a scrap confusing at first. Luckily, Lightroom makes the procedure much easier!
First, you need to decide the final prototype size of your photo. This will vary depending whether you want to print the photo or share it in a spider web or social media platform.
In any case, with just a few simple steps you can resize your images in Lightroom to fit the dimensions and resolution you want.
And it’s a very fast process since you can resize multiple images at the same time too.
Nosotros accept a smashing commodity on creating a Lightroom contact sheet to check out side by side!