Aspect Ratio Calculator

Find the true ratio of any dimensions, scale up or down without stretching, and fit media into fixed boxes - instantly.

Your dimensions

Width (px) × Height (px)

Exact ratio

16:9

1.78 : 1 · 2.07 MP

Scale to a ratio

New width × New height

Matched size (16:9)

1280 × 720

Fit inside a box (no crop)

Box width × Box height

Largest fit

1120 × 630

scale ×0.58

What is an aspect ratio?

An aspect ratio is the proportional relationship between an image's width and height, written as two numbers like 16:9. It describes shape, not size - a 1920×1080 YouTube thumbnail and a tiny 320×180 preview share the same 16:9 shape. Keeping the ratio constant while resizing is what prevents the stretched, squashed look that makes professional work look amateur.

Why ratios rule social media in Nepal

Every platform enforces shapes: YouTube thumbnails want 16:9, Instagram grid posts are square 1:1, Reels and TikTok demand vertical 9:16, Facebook cover photos sit near 16:6. Nepali creators running pages for trekking agencies, colleges, or online stores juggle all of these daily. This calculator converts one master design into every required size without distortion.

Simplifying any measurement

Enter your real pixel dimensions - or physical ones like a 6×4 inch photo frame - and the tool reduces them to the smallest whole-number pair using the greatest common divisor. 1920×1080 becomes 16:9, 600×400 becomes 3:2, and odd sizes like 1366×768 reveal themselves as roughly 16:9, which explains why some videos still show thin bars.

Resizing with the locked ratio

Pick a target ratio from the presets or type your own, then enter either the new width or the new height - the missing dimension computes instantly. Designers use this when a client asks for "the same banner at 800 pixels wide": you get the exact matching height in one step instead of trial-and-error cropping.

Fitting inside a fixed box

The fit mode answers a different question: what is the largest version of my image that fits inside a container without cropping or overflow? It scales your source down until both dimensions clear the box limits - exactly how object-fit: contain behaves in CSS. Perfect for thumbnails inside fixed cards, product photos in catalogues, or slides inside a projector's resolution.

Pixels, prints and megapixels

The tool also reports total megapixels, which maps directly to print quality: about 2 MP makes a decent 4×6 inch print at 300 DPI, while billboards need far less because they are viewed from afar. When someone hands you a photo for print, check its ratio and megapixels here before promising sizes.

100%

Free, always

Sign-up needed

Unlimited

Calculations

Px/%

Any unit

Offline

Works without net

Made for screens in Nepal

Who keeps images and layouts the right shape without paid design software.

Social media posts

Creators size images to 4:5 for Instagram, 16:9 for YouTube thumbnails or 1:1 for Facebook without distorting.

Print & banners

Print shops in New Road and elsewhere convert a required size into the right ratio for flex banners and visiting cards.

Web & UI designers

Developers keep consistent aspect ratios across cards and hero images on Nepali websites.

Photographers

Studio photographers crop to standard frames and canvases without guessing pixels.

Students & teachers

Make slides and posters that fit projector and screen ratios for school presentations.

E-commerce sellers

Keep product photos uniform in ratio so the listing looks clean on marketplaces.

What is an aspect ratio calculator, and how does this free Nepal tool work?

An aspect ratio is the proportional relationship between width and height (like 16:9). An aspect ratio calculator finds the matching size for a target dimension so images don’t stretch. Scolar’s tool is free and browser-only: enter a ratio or two sizes, set a target width or height, and get the exact pixels. No sign-up, no watermark, nothing uploaded.

Why it is free, with no sign-up and unlimited use

The maths runs in your browser, so nothing is uploaded and no account is needed. That keeps the tool 100% free, adds no watermark, asks for no email, and lets you calculate unlimited sizes.

How to calculate aspect ratio, step by step

Enter a known width and height, or a ratio like 16:9.
Set the target dimension you want to fit (width or height).
Get the matching size that keeps the same aspect ratio, with no distortion.

For Nepali creators and shops

Whether you run a New Road print shop, a YouTube channel from Kathmandu, or an online store, consistent ratios make work look professional. The tool works offline after loading, so you can use it on a phone at a cyber café or on a slow connection.

“A Nepali designer should not pay for software just to keep image ratios right. Enter the ratio, get the pixels — free.”

Ratios kept free in Nepal

I needed 4:5 for Instagram and 16:9 for YouTube. This tool gives the exact pixels from a ratio — no more stretched images.

AS Aarav Shrestha Content creator · KTM

For banners I get the ratio and convert to the size the printer wants. Saves me from trial and error, and it is free.

MM Manoj Maharjan Print shop owner

I keep card images consistent across a client site using this. Quick, no signup, works on my phone at the cafe.

KT Kriti Thapa Web designer

How it works

Type your real width and height to see the exact simplified ratio.

Pick a preset like 16:9 or 9:16, then enter the new width or height.

Read the matched size, or use Fit mode for the largest uncropped version inside a box.

Why use this tool?

Ratios are reduced with the greatest common divisor - 1920×1080 becomes exactly 16:9.
Edit either dimension and the other follows the locked ratio automatically.
Megapixel readout tells you if an image is really print-worthy.

Frequently asked questions

How do I calculate an aspect ratio?

Divide width and height by their greatest common divisor. 1920÷120 and 1080÷120 give 16:9. This tool does it instantly for any dimensions.

What aspect ratio is 1920x1080?

Exactly 16:9 - the standard for HD video, YouTube thumbnails, and most modern monitors.

How do I resize without distortion?

Keep the ratio constant: enter your new width and let the height be computed (or vice versa). The Scale section of this tool does exactly that.

Which ratio should I use for Reels or TikTok?

Vertical 9:16 fills the whole phone screen. Shoot or crop your master video/photo at 1080×1920.

Does changing aspect ratio reduce quality?

Resizing within the same ratio only resamples pixels. Changing the ratio itself requires cropping (losing content) or padding (adding bars).

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