Video Storage Calculator
Enter the storage capacity and the recording bitrate to see how many minutes and hours of video fit. The calculator also shows the footage size per minute so you can plan card swaps.
How to estimate recording time
- Enter the storage capacity in gigabytes, such as 64 or 128.
- Enter the recording bitrate in megabits per second.
- Read how many minutes and hours fit, plus the megabytes used per minute.
Examples
64 GB at 50 Mbps
64 GB, 50 Mbps
About 170.7 minutes (2.84 hours)
128 GB at 100 Mbps
128 GB, 100 Mbps
About 170.7 minutes (2.84 hours)
Frequently asked questions
How is recording time calculated?
Convert storage to megabits by multiplying gigabytes by 1000 then by 8, and divide by the bitrate. For 64 GB at 50 Mbps that is 512000 megabits over 50, which is 10240 seconds or about 170.7 minutes.
Why does a higher bitrate give less recording time?
A higher bitrate stores more data each second, so the same card fills up faster. Doubling the bitrate roughly halves how long you can record.
Does this use decimal or binary gigabytes?
It uses decimal gigabytes, where 1 GB is 1000 MB, which matches how card and drive capacities are advertised.
Why is my real recording time a bit shorter?
Cards format to slightly less than their labeled size, and variable bitrate footage can run higher than the average. Treat the result as a close upper estimate.
Does this include the audio track?
Use the combined video and audio bitrate for the most accurate result. If you only know the video bitrate, add the audio bitrate before entering it.
Related tools
Video File Size Calculator
Estimate video file size from bitrate and duration, or solve for any one value. Enter two of bitrate, length and size to get the third in MB and GB.
Video Bitrate Calculator
Find the recommended upload bitrate by resolution and frame rate. Get suggested Mbps for 720p, 1080p, 1440p and 4K at standard and high frame rates.
Aspect Ratio Resize Calculator
Resize images and video while keeping the aspect ratio. Enter the original size and one new dimension to get the matching width or height plus the ratio.
Shutter Angle Calculator
Convert shutter angle to shutter speed at any frame rate, or back. Get the 1/X second value for the 180 degree rule and other angles for cinematic motion.
Timecode Calculator
Convert SMPTE timecode to total frames and seconds, or back again, at any frame rate. Non-drop-frame HH:MM:SS:FF conversion for editing and VFX.