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Photography & video

Slow-Motion Factor Calculator

Find playback slowdown from recording and playback frame rates.

Units clearly labeledCheck practical equipment limits
Photo & video desk
Photo & video desk

Match the sensor, lens and output settings to your equipment.

See the method

Set up your shot

Runs on your device

Your camera calculation

Your result

Let’s calculate.

Use the Calculate button to see your result.

Review the method below for assumptions and conventions.

How to use this tool

  1. Enter capture frame rate, playback frame rate.
  2. Select Calculate to view the result.
  3. Check the method and assumptions below before using the result.

Input reference and sample values

Use the units and choices shown for each field. Sample values are provided for practice, not as recommendations.

InputFormat and unitsSample
Capture frame rateNumeric value. Unit: fps. Must be greater than zero.120
Playback frame rateNumeric value. Unit: fps. Must be greater than zero.30

Result for these sample inputs

4 ×

Select Try the example in the form to load these values and calculate them again. This replaces the current form inputs. Compare the result with the method and worked explanation below.

The method, explained

Duration multiplier = capture fps/playback fps.

A WORKED EXAMPLE

Using capture frame rate = 120 fps, playback frame rate = 30 fps, the result is 4 ×. Change these example inputs to match your task; use the method above to check each step.

What to keep in mind

Assumes all captured frames are retained without interpolation. An ideal geometric or exposure estimate. Lens behavior, stabilization, sensor crop and scene conditions may change practical results.

Methodology maintained by ClarityKit. How these tools are built and checked.