Free Video File Size Estimator
Estimate video file size before you start recording or exporting. Know exactly how much storage you need.
Supports H.264, H.265, AV1, ProRes, RAW, and more. From 480p to 8K with full audio track options.
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AI Video Editor
Drop your footage, tell it what you want. Cubix cuts, captions, color grades, and exports — fully on its own. No timeline. No manual work. Just results.
Cinematic Screen Recorder
Hit record on Windows. Auto-zoom, cinematic backgrounds, and studio-quality audio kick in automatically — your screen recording looks edited before you've touched a thing.
9 Codecs
H.264, H.265, AV1, VP9, ProRes 422, ProRes 4444, RAW, MPEG-2, and MJPEG. From consumer cameras to cinema RAW.
Audio Included
Choose from AAC, MP3, Dolby Digital, PCM 16/24-bit, or no audio. The audio bitrate is factored into the final size estimate.
Plan Your Storage
Know how much storage you need before you shoot. Avoid running out of space on location or in post-production.
Frequently Asked Questions
How big is a 10-minute 4K H.264 video?
A 10-minute (600s) video at 4K H.264 with AAC audio at 30fps is approximately 2.5–2.6 GB. With H.265 at the same settings it's around 1.1 GB — roughly half the size.
How big will my 10-minute 4K video be?
It depends on codec, bitrate, fps, and audio. Use the estimator above: choose your codec, set duration to 10 minutes, pick 4K, set fps, and add audio — you'll get an approximate size in GB for your exact settings.
Why are ProRes files so large?
ProRes uses minimal compression (around 6–10:1 vs H.264's 300:1+) to preserve maximum quality for editing and color grading. A 10-minute 4K ProRes 422 file is around 11 GB vs 2.5 GB for H.264.
Does frame rate affect file size?
Yes. Doubling the frame rate (e.g. 30fps → 60fps) roughly doubles the file size, because there are twice as many frames to encode. Our estimator scales the bitrate proportionally with fps.
Related video calculators
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