Video Storage Calculator
Estimate the total storage required for video footage from bitrate, duration, and number of clips.
Results
What is it?
Video file size is determined by bitrate (data rate) and duration. The formula is: Size (MB) = Bitrate (Mbps) × Duration (seconds) ÷ 8. Higher bitrates produce better quality but require more storage and faster media cards.
How to use
Enter the camera or codec bitrate in Mbps, the recording duration (choose seconds/minutes/hours from the unit selector), and the number of clips. The result updates in GB, MB, and TB simultaneously.
Example scenario
Recording 60 minutes of 4K footage at 100 Mbps: 100 × 3600 / 8 = 45,000 MB = 43.9 GB. A full-day wedding shoot of 8 hours at the same bitrate requires roughly 352 GB — plan at least two 512 GB CFexpress cards or a portable SSD.
Pro tip
Card write speed must exceed your bitrate. A 100 Mbps stream needs a card rated at least 12.5 MB/s — but real-world overhead means 30 MB/s or faster cards are safer. For RAW video at 800+ Mbps, only CFexpress Type B or high-speed SSDs are viable. Always carry 1.5× your estimated storage as a buffer.