How long can I record 4K video on a 16GB SD card? (YI 4K+ Action Camera)

The 4K/60FPS video bitrate is approximately 100Mbps. Shooting one minute of video consumes 750MB of memory. A 16GB SD card can record for around 20 minutes.

The 4K/30FPS video bitrate is approximately 60Mbps. Shooting one minute of video consumes 450MB of memory. A 16GB SD card can record for around half an hour.