Concrete user question
What height belongs to a 1080-pixel-wide 9:16 canvas, and what width belongs to a 1080-pixel-high version?
Tool
Video Aspect Ratio Calculator
Calculate the missing pixel dimension from a ratio and one known width or height.
It removes arithmetic mistakes while keeping the difference between width-locked and height-locked calculations explicit.
Canvas geometry
Working calculator
9:16
RATIO TEST
Calculated result
1080 x 1920
Calculates dimensions; it does not preview a real crop or platform safe area.
Ratio
9:16
Width
1080
Height
1920
Calculation examples
Geometry9:16
Ratio frameExample
9:16
9:16 · vertical reference
Width fixed1080 × 1920
Width result
1080 × 1920
Height result
608 × 1080
Rounded pixel result
If width = 1080px
1080 × 1920 px
9:16 · vertical reference
If height = 1080px
608 × 1080 px
9:16 · vertical reference
How the calculation works
Reviewed: 2026-07-20Worked example
Example: ratio 9:16 with known width 1080 returns 1080 × 1920; with known height 1080 it returns 608 × 1080 after rounding.
Method
Enter ratio width and height, then one known pixel dimension. The calculator returns both interpretations so you can choose whether the input represents width or height.
Open formula
height = round(known width × ratio height ÷ ratio width); width = round(known height × ratio width ÷ ratio height).
Limitations
The result is geometry only. It does not crop footage, define a platform safe area or prove that the chosen dimensions are currently accepted.
Next verification step
Use the calculated dimensions as a planning value, then verify the canvas and visible text in the destination's current preview.
Common presets
These are transparent calculation examples, not guaranteed platform or FreeCut presets.
Vertical reference
9:16 · 1080×1920
Landscape reference
16:9 · 1920×1080
Square reference
1:1 · 1080×1080
Tall-feed reference
4:5 · 1080×1350
When to use it
- Calculate 1080 × 1920 from a 9:16 ratio and 1080-pixel width.
- Find the matching width when a delivery system fixes the height.
- Check a custom 3:2 or 21:9 canvas before creating it.
Use it inside FreeCut
Use the result as a planning value and compare it with the options actually visible in FreeCut 1.3 and the destination's requirements.
FAQ
FAQ
Why can the second result be 608 × 1080 instead of 607.5 × 1080?+
Pixel dimensions use whole numbers, so the calculator rounds the mathematical result to the nearest pixel.
Does a correct ratio prevent cropping?+
No. Ratio describes the canvas. Source composition still has to be reframed and reviewed.
Cut, calculate, export — in one app.
Use the documented FreeCut 1.3 export controls and verify the result against your actual destination. No forced FreeCut watermark.