Resolution planning math

Resolution & Scaling Calculator

Calculate scaled dimensions, fit and cover sizes, crop or pad offsets, and FFmpeg scale snippets for video exports.

Scale and fit workspace

Enter source and target dimensions to plan resize, contain, cover, crop, and padding values.

Source width

Source height

Target width

Target height

Manual scale percent

Snippet mode

Round output dimensions to even pixels

Result

1920x1080 at 100% = 1920x1080. Fit into 1080x1920: 1080x608 with 0px horizontal and 656px vertical padding. Cover: 3414x1920, crop 1167px horizontally and 0px vertically.

Manual scale

1920x1080

Fit size

1080x608

Pad 0px / 656px

Cover size

3414x1920

Crop 1167px / 0px

Target canvas

1080x1920

Even dimension rounding on

FFmpeg snippet

ffmpeg -i input.mp4 -vf "scale=1080:1920:force_original_aspect_ratio=decrease,pad=1080:1920:(ow-iw)/2:(oh-ih)/2,scale=trunc(iw/2)*2:trunc(ih/2)*2" output.mp4 # source 1920x1080

How it works

1 Enter your source video dimensions and target canvas.
2 Choose a manual scale percentage and whether output dimensions should round to even pixels.
3 Copy the fit or cover FFmpeg snippet for your export.

FAQ

Are calculations sent to a server?

No. These calculators run locally in your browser and do not upload files or inputs.

Are the results exact?

They are planning estimates. Real exports can vary because codecs, motion, audio, metadata, and platform re-encoding all affect final size and quality.

Why round to even dimensions?

Many video encoders prefer even width and height values. Rounding to even dimensions helps avoid codec errors during export.

What is the difference between fit and cover?

Fit keeps the full source visible with padding if needed. Cover fills the target canvas and crops the overflow.

Want professional polish?

These calculators help you plan exports. Aufzeichna's desktop app helps you create the polished recording with cinematic zoom, smooth cursor motion, and export control.

Check out the desktop app