What is the 3:2 aspect ratio?

It means for every 3 units of width there are 2 units of height. Dividing 3 by 2 gives the ratio 1.5. This is the native format of 35mm film and most DSLR sensors, as well as the standard 4×6-inch photo print.

How do I calculate the height from a given width?

Multiply the width by 2 and then divide by 3. For example, a width of 6000 px gives a height of 6000 × 2 / 3 = 4000 px.

How do I calculate the width from a given height?

Multiply the height by 3 and then divide by 2. For example, a height of 2000 px gives a width of 2000 × 3 / 2 = 3000 px.

Which cameras shoot in 3:2?

Most Canon, Nikon, Sony, and Pentax DSLRs, plus many Sony and Leica mirrorless cameras, capture images natively in 3:2. The ratio comes directly from the 36×24 mm frame of 35mm film.

What are common 3:2 print sizes?

The most common are 4×6 in (wallet/standard print), 6×4 in (landscape), 8×12 in, 10×15 in, 12×18 in, 16×24 in, and 20×30 in. All these sizes maintain a perfect 3:2 ratio.

Does this tool work in units other than pixels?

Yes. The 3:2 ratio is dimensionless, so the math applies equally to centimeters, inches, millimeters, or any other unit. Just treat the numbers as your chosen unit.

3:2 Aspect Ratio Calculator

Name: 3:2 Aspect Ratio Calculator
Availability: InStock
Author: Nham Vu

Enter a width or height and instantly get the matching 3:2 dimension used in 35mm film, DSLRs, and classic photo prints.

Enter a Dimension

Width

Height (computed)

Common Presets

Result

Enter a dimension to see the result.

Common 3:2 Dimensions Reference

Name / Use	Width	Height	Megapixels
720p equivalent	1080	720	0.78 MP
2K digital cinema	2048	1365	2.8 MP
3000 × 2000 (6 MP)	3000	2000	6 MP
Canon APS-C (12 MP)	4272	2848	12.2 MP
Canon / Nikon APS-C (20 MP)	5472	3648	20 MP
Sony / Nikon full-frame (24 MP)	6000	4000	24 MP
Sony A7R V full-frame (42 MP)	7952	5304	42.2 MP
Canon R5 full-frame (60 MP)	9504	6336	60.2 MP

Click any row to populate the calculator with those dimensions.

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Summary

Enter a width or height and instantly get the matching 3:2 dimension used in 35mm film, DSLRs, and classic photo prints.

How it works

Choose whether you know the width or the height.
Type the known dimension into the input field.
The calculator instantly computes the missing dimension using the 3:2 ratio.
Common presets (APS-C, full-frame, standard prints) are provided for one-click filling.
A reference table of popular 3:2 sizes is shown below the inputs.
Copy either dimension or both to your clipboard with one click.

Use cases

Find the correct crop height when exporting a DSLR photo at a specific width.
Size a 4×6 or 6×4 print order correctly in pixels for a given DPI.
Create correctly proportioned social media photos that match your camera sensor.
Verify that a canvas or artboard uses a true 3:2 ratio before printing.
Resize images for photo books while maintaining the original aspect ratio.
Calculate sensor-native dimensions for full-frame and APS-C cameras.
Set up correct slide dimensions for photography portfolios and presentations.
Convert print sizes (inches) to pixel dimensions for web display.

Frequently Asked Questions

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Last updated: 2026-05-23 · Reviewed by Nham Vu