How long does a 256GB card record on a 1080p front only dash cam?
About 44 h 5 min. A 256GB card at a typical 12 Mbps (12 Mbps front) keeps roughly 44.1 hours of 1080p front only footage before the oldest files are overwritten.
SANDISK 256GB High Endurance microSD Card + Adapter
256GB / high endurance
A high-endurance 256GB card rated for continuous video, the size this page is about. Check your camera's maximum supported card size first.
How does bitrate change the answer?
The same 256GB card at three bitrates for a 1080p front only camera. Cameras that record H.265 sit near the efficient row; cameras set to their highest quality sit near the high row.
| Total bitrate | Loop on 256GB |
|---|---|
| 9 Mbps (efficient H.265) | 58 h 47 min |
| 12 Mbps (typical) | 44 h 5 min |
| 17 Mbps (high quality) | 31 h 30 min |
What about other card sizes?
Recording time scales in a straight line with card size: double the card, double the loop. The step that matters is whether the loop covers your longest driving day plus any parking-mode time.
| Card | 1080p, front only |
|---|---|
| 16GB | 2 h 45 min |
| 32GB | 5 h 31 min |
| 64GB | 11 h 1 min |
| 128GB | 22 h 3 min |
| 256GB | 44 h 5 min |
| 512GB | 88 h 11 min |
How does 256GB compare across cameras?
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 |
1080p front only dash cams and 256GB+ cards
Check your camera's maximum supported card size before buying.
BlackVue DR770X II, 1080P Full HD Dash Cam Front, STARVIS, Free 512GB Card1080p / front only$399.99Check price on Amazon
(5 Yrs Free Data Recovery) (Dash Cam) GIGASTONE 256GB Micro SD Card, TLC High Endurance...256GB / high endurance$69.99Check price on Amazon
VIOFO 256GB Industrial Grade High Endurance microSDXC Card for Dash Cam256GB / high endurance$109.99Check price on Amazon
Other card and camera combinations
Frequently asked questions
Is 256GB enough for a 1080p front only dash cam?
256GB keeps about 44 h 5 min of footage at this setting. That covers a full day of commuting and most road-trip legs, so it is enough for most drivers. Parking mode and locked event files both use the same card, so allow some margin.
What happens when a 256GB dash cam card is full?
Loop recording deletes the oldest unlocked clip and keeps writing, so the card never stops recording; it just reaches back about 44 h 5 min at this setting. Clips locked by the G-sensor or the event button are protected and are not overwritten, which shrinks the loop until you clear them.
Why might my camera record less than this?
This page assumes a typical 12 Mbps. Some 1080p cameras record at a higher quality setting, H.264 instead of H.265, or reserve part of the card for event and parking files. Record ten minutes and check the file size on a computer to find your real bitrate, then use the recording time calculator.