Aspect Ratio Calculator
Find the aspect ratio of any size and calculate a new width or height that keeps the same proportions — great for images, video and design.
Resize keeping the ratio (fill one):
About Aspect Ratio Calculator
Looking for a fast, free design helper? Find the aspect ratio of any size and calculate a new width or height that keeps the same proportions — great for images, video and design. Aspect Ratio Calculator is made for anyone building websites or visuals. People reach for it when they're picking a colour palette for a project or converting a colour between HEX, RGB and HSL, and it handles both in seconds. Use it as often as you like — there are no limits and no cost.
Why use Aspect Ratio Calculator?
- Save time — keep your designs consistent in seconds instead of doing it by hand.
- Fewer mistakes: let Aspect Ratio Calculator handle the fiddly parts so you don't have to.
- Skip the expensive software — Aspect Ratio Calculator does the job for free.
- Simple enough for beginners, dependable enough to use every day.
- Designed to help you copy clean code or values with less effort.
Whether you do this daily or just once in a while, Aspect Ratio Calculator is built for anyone building websites or visuals.
Key features
- Works on every modern browser, mobile and desktop.
- Privacy-first: your input is used only to produce your result.
- Instant results — no waiting around or page reloads.
- Clean, intuitive interface with no learning curve.
What you can use Aspect Ratio Calculator for
- Picking a colour palette for a project
- Converting a colour between HEX, RGB and HSL
- Checking colour contrast for accessibility
How to use Aspect Ratio Calculator
- Open Aspect Ratio Calculator — there's nothing to install or sign up for.
- Enter your details in the fields above.
- Click “Generate” and let Aspect Ratio Calculator do the work in seconds.
- Copy or tweak the result, and run it again any time.
Tips for getting the best results
- Copy your result and adjust it to match your own voice, brand or style.
- Great for picking a colour palette for a project — one of the most common reasons people open Aspect Ratio Calculator.
- Be specific with your input — the more detail you give, the better Aspect Ratio Calculator performs.
Frequently asked questions
Can I use Aspect Ratio Calculator on my phone?
Absolutely. Aspect Ratio Calculator runs in any modern browser, so it works on phones, tablets and computers alike.
Is Aspect Ratio Calculator free?
Yes — Aspect Ratio Calculator is 100% free with no account, subscription or hidden charges. Use it as much as you like.
What makes Aspect Ratio Calculator different?
Aspect Ratio Calculator focuses on doing one job really well, fast and for free, with no setup — so you can nail the right look fast and get on with your day.
Is my data safe with Aspect Ratio Calculator?
Your input is used only to produce your result and isn't sold or shared. See our privacy policy for the full details.
Do I need to sign up to use Aspect Ratio Calculator?
No sign-up or login is needed. Just open Aspect Ratio Calculator and start straight away.
How much does Aspect Ratio Calculator cost?
Nothing — Aspect Ratio Calculator is free to use, with no trial limits or paywall.