Video File Size Calculator
From Bitrate & Duration
Calculate file size from video bitrate and duration
From Resolution & Codec
Estimate file size from common recording presets
Storage Capacity
How much video fits on your storage
Formula
File Size (MB) = (Bitrate in Mbps × Duration in seconds) / 8 | 1 GB = 1024 MB
Frequently Asked Questions
How big is a 1-hour 4K video?
At typical H.264 encoding (40 Mbps), 1 hour of 4K video is about 18 GB. With H.265/HEVC, it's about 9 GB. ProRes 422 4K can be 100+ GB per hour.
What is video bitrate?
Video bitrate is the amount of data used per second of video, measured in Mbps (megabits per second). Higher bitrate means better quality but larger files.
H.264 vs H.265 - what's the difference?
H.265 (HEVC) is about 50% more efficient than H.264, producing similar quality at half the file size. However, H.265 requires more processing power to encode and decode.
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