How the Video Storage Calculator Works
Video bitrate is measured in megabits per second (Mbps). There are 8 bits in a byte, so the file size is bitrate times seconds divided by 8. The calculator adds your photos, multiplies by the number of flights, then suggests a card size with a 20 percent buffer.
GB = Mbps × minutes × 60 ÷ 8 ÷ 1,000
Worked Example
Recording 15 minutes at 130 Mbps creates about 14.6 GB. Forty RAW photos at 40 MB add 1.6 GB, so each flight uses around 16.2 GB. Four flights is roughly 65 GB, and with a buffer a 128 GB card is the right choice.
Typical Bitrates
| Mode | Typical bitrate | Per minute |
|---|---|---|
| 1080p/30 | 30 to 50 Mbps | 0.2 to 0.4 GB |
| 4K/30 | 100 Mbps | 0.75 GB |
| 4K/60 | 150 Mbps | 1.1 GB |
| 5.4K to 6K | 180 to 200 Mbps | 1.35 to 1.5 GB |
Choosing a Memory Card
- Pick a card rated V30 or higher (UHS-I U3) for 4K recording.
- Use two smaller cards rather than one huge one, so a failure doesn't lose a whole day.
- Format the card in the drone, not on a computer.
- Back up after every session.
For better results, see our drone photography tips. To match recording time to battery life, use the flight time calculator.
FAQ
Frequently Asked Questions
How much storage does 4K drone video use?
At 100 Mbps, 4K video uses about 0.75 GB per minute, or 45 GB per hour. At 150 Mbps it is about 1.1 GB per minute.
What SD card size do I need for my drone?
For most camera drones a 128 GB card is a good minimum for a day of 4K flying. Choose a V30 or faster card so it can keep up with high bitrates.
How do I calculate video file size?
Multiply the bitrate in megabits per second by the recording time in seconds, then divide by 8 to get megabytes. Divide by 1,000 for gigabytes.
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