3:2 Aspect Ratio Calculator

A 3:2 frame is three units wide for every two units tall, a decimal value of exactly 1.5. It is taller than 16:9 but wider than 4:3, which is why it prints cleanly at traditional photo sizes.

The ratio comes from the 36 × 24 mm frame of 35mm film — three units by two. Because the format ran for most of the twentieth century, an enormous amount of photographic infrastructure was built around it: print sizes, negative sleeves, enlarger masks, and later the sensor dimensions of digital cameras. When you shoot in 3:2 you are shooting in the same proportions as a roll of film.

Because 3:2 reduces to 1.5, every calculation is a simple halving and tripling — the easiest ratio to work with by hand.

1. Divide the width by 3.
2. Multiply the result by 2 to get the matching height.
3. Round to a whole pixel if the width is not evenly divisible by three.

Worked example

At 6000 pixels wide: 6000 ÷ 3 = 2000, and 2000 × 2 = 4000, giving the common 6000 × 4000 full-frame output. At 1500 pixels wide: 1500 ÷ 3 = 500 and 500 × 2 = 1000. Working from height instead, 2667 ÷ 2 = 1333.5 and 1333.5 × 3 = 4000, which is why 12-megapixel cameras produce 4000 × 2667 rather than a round number.

3:2 and 2:3 are easy to swap by accident — 3:2 is landscape, 2:3 is the same shape turned portrait, and mixing them up in a batch-export setting can flip an entire shoot's orientation unintentionally. It's also worth not assuming every camera sensor is 3:2 — Four Thirds and Micro Four Thirds cameras shoot natively at 4:3, so files from those systems won't reduce cleanly to 3:2 no matter how they're cropped.

For a mid-size export at 3000 pixels wide: 3000 ÷ 3 = 1000, then 1000 × 2 = 2000. That gives 3000 × 2000, which prints at 10 × 6.7 inches at 300 dots per inch — a useful middle ground between a full-resolution file and a web-sized image.

Type your own numbers into the 3:2 calculator above and it will show the same division, plus the reduced ratio and the CSS to copy.

• 35mm film and the digital sensors designed to match it.
• Full-frame and APS-C DSLR and mirrorless photography.
• 6 × 4 inch prints, the most common consumer print size in many markets.
• Microsoft Surface tablets and several laptop and convertible displays.
• DSLR video before it is cropped to 16:9 for delivery.
• Photo books and albums, which are laid out for 3:2 spreads.

Shooting upright? The portrait version of 3:2 is 2:3 — see the 2:3 aspect ratio guide.

3:2 sits between 4:3 and 16:9. The 4:3 calculator covers the squarer sensor format used by Micro Four Thirds and phone cameras, and the 16:10 calculator covers the ratio closest to 3:2 among common laptop displays.

• 16:9
• 9:16
• 4:3
• 1:1
• 16:10
• 21:9
• 4:5
• 2:3
• 2.39:1

This 3:2 guide is one of ten ratio calculators on the site — the common aspect ratios table lists the decimal value and the typical uses for every one of them.

Add a free, live aspect ratio calculator to any page in one line of code - no account, no API key, no ads. Every embed credits the tool with a Powered by AspectCalc link, so your readers always know where it came from. See the full embedding guide for height and styling options.

<div class="aspectcalc-embed" style="max-width:100%">
  <iframe id="aspectcalc-frame" src="https://aspectcalc.com/embed?h=640"
          width="100%" height="700" style="border:0;border-radius:12px"
          loading="lazy" title="AspectCalc aspect ratio calculator"></iframe>
  <p style="margin:8px 0 0;font:13px/1.4 system-ui,sans-serif;color:#64748b;text-align:center">Powered by <a href="https://aspectcalc.com/" style="color:#2563eb;text-decoration:none">AspectCalc</a> - free aspect ratio calculator</p>
</div>
<script>
  // Optional: grow the frame to the widget's real height.
  // Delete this whole block to keep a fixed-height frame instead.
  addEventListener('message', function (e) {
    if (e.origin !== 'https://aspectcalc.com') return;
    if (!e.data || e.data.type !== 'aspectcalc-height') return;
    var f = document.getElementById('aspectcalc-frame');
    if (f) f.style.height = e.data.height + 'px';
  });
</script>

The frame starts at a fixed height, so your layout never jumps. Resize it with ?h= - for example https://aspectcalc.com/embed?h=520 - or keep the small script in the snippet and the frame will follow the widget's real height instead.