How many hours does a 256GB dash cam card record?
A 256GB card records about 44 h 5 min of 1080p front-only footage and about 12 h 36 min from a 4K front and 1080p rear dash cam, at typical bitrates, before loop recording overwrites the oldest clips.
SANDISK 256GB High Endurance microSD Card + Adapter
256GB / high endurance
A high-endurance 256GB card built for continuous loop recording.
256GB recording time by resolution and channels
Typical bitrates: 12 Mbps for 1080p, 16 Mbps for 2K, 20 Mbps for 2.5K, 32 Mbps for 4K, plus 10 Mbps for each extra 1080p channel. Usable space is taken as 93 percent of the labeled capacity.
| Front resolution | Front only | Front + rear | Three channel |
|---|---|---|---|
| 1080p | 44 h 5 min | 24 h 3 min | 16 h 32 min |
| 2K | 33 h 4 min | 20 h 21 min | 14 h 42 min |
| 2.5K | 26 h 27 min | 17 h 38 min | 13 h 14 min |
| 4K | 16 h 32 min | 12 h 36 min | 10 h 10 min |
High-endurance dash cam cards
Check your camera's maximum supported card size before buying.
SANDISK 32GB High Endurance Video microSDHC Card with Adapter for dash cam and home...32GB / high endurance$22.99Check price on Amazon
SANDISK 128GB High Endurance Video microSDXC Card with Adapter for dash cam and home...128GB / high endurance$36.99Check price on Amazon
VIOFO 128GB Industrial Grade High Endurance microSDXC Card for Dash Cam128GB / high endurance$72.99Check price on Amazon
SANDISK 256GB MAX Endurance microSDXC Card with Adapter for Home Security Cameras and...256GB / high endurance$132.69Check price on Amazon
VIOFO 512GB Industrial Grade High Endurance microSD Card for Dash Cam512GB / high endurance$229.99Check price on Amazon
Other card and camera combinations
Frequently asked questions
How long does a 256GB SD card last in a dash cam?
In recording time, about 44 h 5 min at 1080p front only down to about 10 h 10 min for a 4K three-channel camera. In lifespan, a high-endurance card lasts thousands of hours; a standard card under constant loop recording can fail within months, often silently.
Does a 256GB card work in every dash cam?
No. Each camera has a maximum supported card size, printed in the manual and often in the listing. Many older 1080p cameras stop at 32GB or 128GB, while most current 4K cameras take 256GB or 512GB. A card over the limit may not format or may loop unreliably.