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Video Vertical Crop Retention Calculator

Estimate the retained pixel-area percentage when a landscape frame is center-cropped to a portrait aspect ratio. This tool uses source width (px), source height (px), target width/height ratio as its stated inputs. The output is reported in %, so it should be compared only with figures in compatible units. This assumes a center crop at unchanged source height and only applies when cropping horizontally; taller targets need a different workflow.

How to use this calculator

  1. Measure or look up the input for source width (px) and check that its unit matches the field.
  2. Enter source height (px), target width/height ratio. Change the supplied example numbers to match your own scenario.
  3. Read the calculation in % and review the formula and limitations below before using it to make a decision.

How to calculate video vertical crop retention

Retained area share = min(1, source height × target aspect ratio ÷ source width) × 100 (horizontal crop only).

  • The formula uses the supplied measurements directly and returns its primary result in %. No external data or background estimates are fetched by this calculator.
  • Use consistent reporting intervals and measurement units. A different unit or different definition for one input changes the meaning of the result.

Worked examples

Worked example: Video Vertical Crop Retention

Consider the following example input values: Source width (px) = 1920, Source height (px) = 1080, Target width/height ratio = 0.5625.

Apply the stated relationship: Retained area share = min(1, source height × target aspect ratio ÷ source width) × 100 (horizontal crop only).

Using those inputs gives approximately 31.64062 %.

Understanding the result

The result of the worked example is approximately 31.64062 %; it is an arithmetic outcome rather than a prediction of actual conditions.

This assumes a center crop at unchanged source height and only applies when cropping horizontally; taller targets need a different workflow.

Important notes

This assumes a center crop at unchanged source height and only applies when cropping horizontally; taller targets need a different workflow.

This result reflects the entered values only. Validate source width (px) against a relevant measurement or primary record; rounding, timing, or inconsistent units can affect practical decisions.

Frequently asked questions

What does the video vertical crop retention calculator measure?

Estimate the retained pixel-area percentage when a landscape frame is center-cropped to a portrait aspect ratio.

What formula does this video vertical crop retention calculator use?

Retained area share = min(1, source height × target aspect ratio ÷ source width) × 100 (horizontal crop only). This assumes a center crop at unchanged source height and only applies when cropping horizontally; taller targets need a different workflow.

Can I rely on this video vertical crop retention calculator for a final decision?

First check the input units and whether the underlying assumption is appropriate. This assumes a center crop at unchanged source height and only applies when cropping horizontally; taller targets need a different workflow. For regulated or safety-critical decisions, verify with appropriate authoritative guidance.

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Related explanations

Learn the method behind the number or compare the terminology before using the calculator.

  • Percentage Change vs Percentage Difference — Understand the difference between percentage change and percentage difference, including when each formula is appropriate.
  • How to Calculate Percentage Change — Learn the percentage change formula, how to calculate increases and decreases, and why the original value matters.
  • Area — Understand area as the amount of two-dimensional surface inside a shape and review common formulas.

This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.