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Slow Motion FPS Planner

Plan buttery slow motion before you shoot: enter the source fps, timeline fps, and your slow-motion factor for clean, judder-free frame math.

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Slow-Mo Frame Rate Planner

Turn your goal into a dated, step-by-step plan.

e.g. 120

e.g. 0.5

What is Slow motion fps planner?

Slow-Mo Frame Rate Planner β€” Plan buttery slow motion before you shoot: enter the source fps, timeline fps, and your slow-motion factor for clean, judder-free frame math.

Pure frame-rate arithmetic, no video processing: smooth slow motion needs one real source frame per timeline frame, so it is achievable when sourceFps Γ— slowFactor β‰₯ timelineFps. playbackSpeedPct = slowFactor Γ— 100; effectiveFps = sourceFps Γ— slowFactor. Even cadence requires the source fps to be a multiple of the timeline fps; otherwise the verdict warns of judder on pans and fast motion. If the factor is not achievable, the reshoot target is ceil(timelineFps / slowFactor) rounded up to the next standard high-speed step (60/120/240/480/960). Sources at 240 fps+ carry a light-flicker warning.

Why use this slow motion fps planner?

🎯

Built for slow motion fps planner

Plan buttery slow motion before you shoot: enter the source fps, timeline fps, and your slow-motion factor for clean, judder-free frame math.

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Transparent & honest

Pure arithmetic planning β€” no video is processed and no frames are analyzed.

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Private by design

Everything runs in your browser. Your inputs never leave your device.

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Works everywhere

Fully responsive β€” perfect on desktop, tablet, and mobile. No app needed.

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Regularly updated

Regularly maintained and reviewed to ensure accuracy.

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Free forever

No accounts, no limits, no watermarks. Use Slow-Mo Frame Rate Planner as much as you need.

How to use Slow-Mo Frame Rate Planner

  1. 1Enter your source frame rate β€” what the camera actually records (24-960 fps).
  2. 2Pick your timeline frame rate: 24, 25, 30, or 60 fps.
  3. 3Enter the slow factor you want (0.5 = half speed, 0.25 = quarter speed).
  4. 4Run the planner to see whether the slow motion is smoothly achievable, the playback speed %, and the effective fps.
  5. 5If it is not achievable, follow the shoot recommendation β€” the reshoot frame rate rounded to the next standard step.
  6. 6Read the quality verdict for judder or light-flicker warnings before you shoot.

What can you do with Slow-Mo Frame Rate Planner?

  • What fps for slow motion β€” Plan buttery slow motion before you shoot: enter the source fps, timeline fps, and your slow-motion factor for clean, judder-free frame math.
  • 120fps slow motion percentage β€” Plan buttery slow motion before you shoot: enter the source fps, timeline fps, and your slow-motion factor for clean, judder-free frame math.
  • Smooth slow mo frame rate β€” Plan buttery slow motion before you shoot: enter the source fps, timeline fps, and your slow-motion factor for clean, judder-free frame math.

Good to know

  • Pure arithmetic planning β€” no video is processed and no frames are analyzed.
  • Assumes a constant frame rate source; variable-frame-rate phone footage may behave differently.
  • Even cadence assumes integer frame rates that divide evenly; the judder warning is a heuristic.
  • The light-flicker warning at 240 fps+ is a heuristic β€” test under your actual lighting.
  • Same inputs always produce the same plan β€” the formulas are fully deterministic.

How it works

Pure frame-rate arithmetic, no video processing: smooth slow motion needs one real source frame per timeline frame, so it is achievable when sourceFps Γ— slowFactor β‰₯ timelineFps. playbackSpeedPct = slowFactor Γ— 100; effectiveFps = sourceFps Γ— slowFactor. Even cadence requires the source fps to be a multiple of the timeline fps; otherwise the verdict warns of judder on pans and fast motion. If the factor is not achievable, the reshoot target is ceil(timelineFps / slowFactor) rounded up to the next standard high-speed step (60/120/240/480/960). Sources at 240 fps+ carry a light-flicker warning.

Examples

Half-speed on a 24 fps timeline

Achievable: 60 real fps cover the 24 fps timeline evenly β€” smooth native slow motion.

Too ambitious slow factor

Not achievable: only 15 real fps for a 24 fps timeline β€” the plan recommends reshooting at 60 fps.

People also search for these β€” this tool handles them all:

slow motion fps plannerwhat fps for slow motion120fps slow motion percentagesmooth slow mo frame rate

Frequently asked questions

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