Calculator
Example Data Table
| Ratio | Known Width | Calculated Height | Common Use |
|---|---|---|---|
| 16:9 | 1920 px | 1080 px | Video frame or screen graphic |
| 4:5 | 1080 px | 1350 px | Portrait social image |
| 3:2 | 12 in | 8 in | Photo print |
| 1:1 | 10 in | 10 in | Square frame |
Formula Used
Known width: Height = Width × Ratio Height ÷ Ratio Width.
Known height: Width = Height × Ratio Width ÷ Ratio Height.
Known diagonal: Width = Diagonal × Ratio Width ÷ √(Ratio Width² + Ratio Height²).
Known diagonal: Height = Diagonal × Ratio Height ÷ √(Ratio Width² + Ratio Height²).
Outside frame: Outside Size = Visible Size + 2 × (Mat Border + Frame Border).
Artwork with bleed: Artwork Size = Visible Size + 2 × Bleed.
Pixel output: Pixels = Physical Size in Inches × PPI.
How to Use This Calculator
- Enter the width and height parts of the aspect ratio.
- Select whether you know width, height, diagonal, or box size.
- Enter the known size and choose the correct unit.
- Add frame border, mat border, and bleed if needed.
- Enter source image pixels for crop guidance.
- Set PPI for print pixel requirements.
- Press the calculate button to view results above the form.
- Use CSV or PDF buttons to save the result.
Aspect Ratio Planning Guide
Aspect ratio links width and height. It keeps a frame balanced during resize. A 16:9 frame is wide. A 4:5 frame is taller. The calculator converts those ratio parts into real dimensions. It also estimates outside frame size, mat opening, bleed, pixels, and crop area.
Good frame planning starts with one known value. You may know width, height, or diagonal size. The tool solves the missing side from the selected ratio. It can also fit a ratio inside a maximum box. That helps when a poster, canvas, video, or thumbnail must stay within strict limits.
Use the mat and frame fields for physical projects. A mat border adds space around the visible image. A frame lip or border increases the outside size. Bleed extends artwork beyond the trim edge. These values help printers, framers, designers, and photographers avoid surprises.
Pixel density is useful for print checks. When inches, centimeters, or millimeters are selected, the calculator converts the visible size to inches. Then it multiplies by the chosen PPI. This gives the pixel dimensions needed for sharp output. Higher PPI usually means more detail. Large wall pieces may still look good with lower PPI because viewers stand farther away.
Crop data is useful when the source image ratio differs. A wide photo may need side trimming for a square frame. A tall photo may need top and bottom trimming for a landscape frame. The crop fields show the centered safe crop size. They also show how much is removed.
Common ratios solve many jobs. Use 1:1 for square prints. Use 4:5 for portrait social posts. Use 3:2 for many cameras. Use 16:9 for screens. Custom ratios are also supported. Enter any positive ratio values.
Always confirm final production rules. Real frames may have rabbet depth, tolerance, overlap, or mounting gaps. Printers may require a specific bleed. Screen platforms may compress images. This calculator gives a precise planning base. It does not replace vendor specifications.
For commercial work, save each result. Give the exported file to clients, printers, or installers. It records inputs and outputs in a clear format. This reduces repeat questions. It also helps compare several frame options before buying materials or preparing artwork with less waste during final review.
FAQs
What is an aspect ratio?
An aspect ratio is the proportional relationship between width and height. It does not need fixed units.
Can I use this for picture frames?
Yes. Enter the visible image ratio and size. Then add mat and frame border values for outside size.
Can I calculate video frame dimensions?
Yes. Use pixel units and enter common ratios like 16:9, 9:16, 1:1, or 21:9.
What does contain inside box mean?
Contain keeps the full ratio inside the maximum width and height. It does not exceed the box.
What does fill box and crop mean?
Fill makes the ratio cover the whole box. One side may exceed the box and require cropping.
How is bleed used?
Bleed adds extra artwork beyond the visible trim. Printers use it to avoid blank edges.
Why enter source image pixels?
Source pixels help estimate centered crop size. This is useful when the original image has a different ratio.
Is PPI required?
No. PPI is only needed for print pixel planning. It is not required for screen-only dimensions.