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Topic guide

Video Recording Calculators

Plan capture and playback duration, choose a shutter starting point, then estimate bitrate and storage for the recording settings you will actually use.

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This hub is curated around tasks, not just alphabetized links, so you can choose the right calculator before entering numbers.

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Frame Rate Calculator

Convert video frames to seconds or seconds to frames using FPS. Calculate frame counts, slow-motion playback duration, and time-lapse clip length.

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Calculator groups by task

Use these groups to decide which calculator fits the question you are trying to answer.

5 tools
1. Separate shooting time from playback time
Use frame rate for slow motion, time-lapse, frames to seconds, or seconds to frames. Ten seconds captured at 120 FPS contains 1,200 frames; playing them at 30 FPS lasts 40 seconds. A time-lapse needs the capture interval and elapsed shooting time. These are duration calculations, not drop-frame or SMPTE timecode.
Calculator

Frame Rate Calculator

Convert video frames to seconds or seconds to frames using FPS. Calculate frame counts, slow-motion playback duration, and time-lapse clip length.

2. Choose a shutter starting point for capture
Use shutter speed's video mode with the shooting FPS, not a slowed playback rate. The 180-degree rule suggests an exposure near 1 / (2 × shooting FPS): about 1/240 second at 120 FPS. Treat this as a motion-blur starting point; lighting flicker, exposure, and the intended look can require another setting.
Calculator

Shutter Speed Calculator

Calculate optimal shutter speed for sharp photos. Use the reciprocal rule, 180-degree rule for video, and motion blur thresholds for various scenarios.

3. Budget storage using the recorded file's settings
Use video file size with the file's duration and video plus audio bitrates. Slow-motion cameras may save real-time or already-conformed files, so check a test clip's duration and reported bitrate together rather than multiplying by the slow-motion factor twice. Resolution and FPS alone do not determine compressed file size.
Calculator

Video File Size & Bitrate Calculator

Calculate video file size, target bitrate, or recording duration with separate audio rates and clearly labeled decimal MB/GB or binary MiB/GiB storage units.

4. Leave room for copies and transfer time
Use digital storage to distinguish decimal GB from binary GiB when comparing estimates with available space. Allow room for retakes, variable bitrate, and backup copies. Use download time for an ideal transfer estimate from file size and connection speed; real transfers also depend on overhead and sustained device performance.
Calculator

Digital Storage Calculator

Convert between digital storage units from bits to terabytes. Calculate file sizes and storage requirements for various data types.

Calculator

Download Time Calculator

Estimate how long a file will take to download at your connection speed. Compare download times across different connection speeds.

Practical use cases
Apply the hub to a concrete scenario when use-case pages are available.
Use case

How much storage do my recording settings need?

Estimate storage for a recording from its video bitrate, audio bitrate, and duration. Work through a 90-minute session and budget room for extra takes.

FAQs
Common questions about using this topic hub.

Which duration belongs in the video file size calculator?

Use the duration of the file and the bitrate measured or specified on that same time basis. A camera may store high-frame-rate footage at capture speed or conform it to a slower playback rate. Check a short test file before projecting a whole shoot.

Can these tools calculate drop-frame timecode?

No. The frame rate calculator converts frames and elapsed duration at a stated FPS and estimates slow-motion or time-lapse playback. It does not implement drop-frame numbering or a SMPTE timecode workflow.

Is the 180-degree shutter rule mandatory?

No. It is a common starting point for motion blur, not a safety or compatibility rule. Test under the actual lighting and adjust for flicker, available light, and the motion you want.

Will doubling FPS always double file size?

No. At the same total bitrate and file duration, the size estimate stays the same. A higher-FPS recording mode may choose a different bitrate or duration, so use that mode's settings and leave space for recording overhead and variation.

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