Tool
Video File Size Calculator
Estimate file size from duration, resolution, codec and bitrate.
Estimate the MP4 size before you render so you know whether it fits inside a platform upload limit.
Export package
Live calculator
74 MB
Estimate
74.6 MB
See whether the render fits before you wait for the upload.
Length
60 s
Video
10 Mbps
Audio
192k
Creator presets
TikTok / Reels · 60 s @ 10 Mbps
72.9MB
1.0 min timeline with 10.0 Mbps video and 192 kbps audio.
Video stream
10.0 Mbps
Audio stream
192 kbps
Upload check
Preflight
Estimated MP4 size
72.9 MB
Estimate excludes container overhead and VBR variance. Real exports typically land within +/-10%.
Fits within platform limit?
TikTok
73 MB of 287 MB
Reels
73 MB of 4 GB
Shorts
73 MB of 250 GB
YouTube
73 MB of 250 GB
Common presets
Drop these straight into the calculator or copy them into FreeCut’s export panel.
TikTok / Reels
60 s · 10 Mbps · ~75 MB
YouTube Short
60 s · 14 Mbps · ~105 MB
YouTube 4K
10 min · 40 Mbps · ~3.0 GB
When to use it
- 60 s vertical at 12 Mbps → ~90 MB.
- 10-min YouTube at 12 Mbps → ~900 MB.
- Twitch upload check against 10 GB limit.
Use it inside FreeCut
The same calculation runs live in the export panel — pick a preset, see your file size before you render.
FAQ
FAQ
Why is my real file size different?+
VBR encoders allocate bitrate dynamically — action-heavy clips run higher, static talking-head runs lower. The calculator is an upper-bound estimate.
Does the calculator include audio?+
Yes. Audio bitrate (kbps) is added to the total.