Video aspect ratio calculator
See how a clip fits a portrait, square or landscape canvas. Compare the crop with letterboxing before you edit.
Free to use · No sign-up · Your inputs stay in your browser
Set up your canvas
These are example canvases with even pixel dimensions. This calculator does not resize a file or check a platform’s upload requirements. Crop and padding measurements assume a centered image.
Preview the framing
Illustration only · Purple is your source, black is padding.
- Source ratio
- 16:9
- Output canvas
- 1080 × 1920 px
- Scaled source
- 3,413.3 × 1,920 px
- Source area cropped
- 68.4%
- Trim per left/right edge
- 1,166.7 px
- Trim per top/bottom edge
- 0 px
This enlarges your source by 1.8×. More output pixels do not add detail.
Crop or fit?
Crop fills the canvas but can remove a face, caption or product near an edge. Fit keeps the full image and leaves space above and below, or on both sides. Use the preview to choose a starting point, then position the subject in your editor.
For a 1920 × 1080 clip on a 1080 × 1920 canvas, a centered fill keeps about 31.6% of the original image area. Fitting the same clip keeps the entire image at 1080 × 607.5 pixels, with about 656.3 pixels of padding above and below. Editors round fractional pixels when rendering.
Put the result to work
Crop or fit? Prepare one video for three shapesReady to publish? Check Reeling’s supported destinations and publishing requirements, then choose a plan.