How do I calculate video height from a 16:9 aspect ratio?

Enter the width in pixels and choose 16:9. Click Calculate and the height is computed instantly.

How do I know how much slower 120fps is at 24fps?

Use Slow Motion: set Shoot FPS to 120 and Playback FPS to 24. The tool shows 5× slower (~20% speed) and can convert durations.

Can I convert frames to timecode and back?

Yes. Enter FPS, then either frames or hh:mm:ss:ff and click the appropriate Calculate button. This tool uses non-drop timecode.

How to convert shutter angle to shutter speed?

Enter FPS and a shutter angle (e.g., 180°). The tool shows shutter speed as 1/x seconds. You can also enter shutter speed to get angle.

How to de-squeeze anamorphic footage (1.33×, 1.5×, 2×)?

Enter captured width, height, and squeeze factor (1.33×, 1.5×, 2×). The calculator shows de-squeezed resolution and aspect ratio preview.

What is the best free aspect ratio calculator for 16:9, 9:16, 4:5, 2.39:1?

Video Maths provides a fast aspect ratio converter. Enter width or height and choose a preset (16:9, 9:16, 1:1, 4:5, 4:3, 2.39:1) or a custom ratio to compute pixel dimensions instantly.

How do I convert 120fps slow motion to 24fps playback (speed percentage and duration)?

Set Shoot FPS to 120 and Playback FPS to 24. The tool shows ~20% speed (5× slower) and converts Original Duration to Played Duration automatically.

How to convert frames to timecode at 23.976, 24, 25, or 29.97 fps?

Enter the frame rate, then either total frames or a timecode in hh:mm:ss:ff. Click the matching Calculate button to convert frames ↔ timecode. (This tool uses non‑drop timecode.)

Can I calculate Instagram Reels, TikTok, and YouTube Shorts sizes (9:16, 1:1, 4:5)?

Yes. Choose 9:16, 1:1, or 4:5 in Aspect Ratios and enter your width or height to get exact pixel dimensions for Reels, TikTok, Shorts, and Pinterest video.

Does the slow motion calculator work for 240fps to 30fps or 25fps?

Yes. Enter any Shoot FPS (e.g., 240) and any Playback FPS (e.g., 30 or 25). The tool gives the slowdown factor and duration conversion for editorial planning.

What are common cinema and broadcast frame rates?

Cinema: 24 fps. Web/streaming: 23.976, 24, 25, 29.97, 30, 50, 59.94, 60. Use the Frames ↔ Timecode tool to convert precisely between frames and timecode at these rates.

Is Video Maths free and privacy‑friendly?

Yes. It’s free, cookie‑less, minimal, and works offline. No account required.

How to convert shutter angle to shutter speed?

Enter FPS and a shutter angle (e.g., 180°). The tool shows shutter speed as 1/x seconds. You can also enter shutter speed to get angle.

How to de-squeeze anamorphic footage (1.33×, 1.5×, 2×)?

Enter captured width, height, and squeeze factor (1.33×, 1.5×, 2×). The calculator shows de-squeezed resolution and aspect ratio preview.

Video Maths – Free Video Calculators (Aspect Ratio, FOV, Slow Motion, Timecode, Shutter, Anamorphic)

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Aspect Ratios

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Field of View / Crop Factor

Full Frame is the standard reference; Super 35 is most common in cinema. Change reference to compare equivalents.

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Slow Motion

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Frames ↔ Timecode

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Shutter Angle ↔ Shutter Speed

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Anamorphic / Squeeze

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About text placeholder

Glossary

Aspect Ratio

Relation between width and height of an image (e.g., 16:9). Pixel dimensions that share the same ratio are proportional.

Slow Motion

Difference between shoot FPS and playback FPS. 120→24 fps yields 5× slower (~20% speed); durations scale accordingly.

Timecode (NDF/DF)

Timecode labels frames as hh:mm:ss:ff. This tool uses non-drop (NDF). Broadcast often uses drop-frame at 29.97 to match clock time.

Shutter Angle / Speed

Angle at the film gate (°) maps to shutter speed: 1/x = (360×FPS)/Angle. 180° ≈ natural motion blur; 90° is crisper.

Crop Factor / FOV

Crop factor compares sensor diagonal to reference (default Full Frame 43.27 mm). Equivalent focal = focal × crop factor. FOV = 2·atan(size/(2·focal)).

Anamorphic / Squeeze

Squeeze (e.g., 1.33×, 2×) widens the horizontal view. De-squeeze multiplies width; aspect ratio and FOV change accordingly.

FAQ – Video Calculators for Filmmakers

How to use the aspect ratio calculator for 16:9, 9:16, 1:1, 4:5, 4:3, 2.39:1?

Enter width or height in pixels and select a preset ratio (16:9 for YouTube, 9:16 for TikTok/Instagram Reels, 1:1 for square, 4:5 for Instagram feed, 4:3 legacy, 2.39:1 scope). Click Calculate to get the matching dimension and actual ratio.

How do I compute slow motion speed from 120fps or 240fps to 24/25/30fps?

Set Shoot FPS to 120 or 240 and Playback FPS to 24, 25, or 30. The calculator shows the slowdown factor (e.g., 5× slower) and converts durations, useful for editing and storyboards.

Frames to timecode converter at 23.976, 24, 25, 29.97 fps

Enter FPS and either total frames or a timecode in hh:mm:ss:ff. Our non‑drop timecode converter returns the equivalent frames or timecode instantly.

What pixel sizes should I export for YouTube, Instagram, TikTok, and Shorts?

Use 1920×1080 (16:9) for YouTube, 1080×1920 (9:16) for TikTok/Reels/Shorts, 1080×1080 (1:1) for square, and 1080×1350 (4:5) for Instagram portrait. The ratio tool computes any custom size.

Does this work offline and without cookies?

Yes. Video Maths is minimal, private, cookie‑less, and works offline once loaded.