How long does a 64GB card record on a 4K front only dash cam?
About 4 h 8 min. A 64GB card at a typical 32 Mbps (32 Mbps front) keeps roughly 4.1 hours of 4K front only footage before the oldest files are overwritten.
64GB / high endurance
A high-endurance 64GB 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 64GB card at three bitrates for a 4K 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 64GB |
|---|---|
| 24 Mbps (efficient H.265) | 5 h 31 min |
| 32 Mbps (typical) | 4 h 8 min |
| 45 Mbps (high quality) | 2 h 57 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 | 4K, front only |
|---|---|
| 16GB | 1 h 2 min |
| 32GB | 2 h 4 min |
| 64GB | 4 h 8 min |
| 128GB | 8 h 16 min |
| 256GB | 16 h 32 min |
| 512GB | 33 h 4 min |
How does 64GB 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 | 11 h 1 min | 6 h 1 min | 4 h 8 min |
| 2K | 8 h 16 min | 5 h 5 min | 3 h 40 min |
| 2.5K | 6 h 37 min | 4 h 25 min | 3 h 18 min |
| 4K | 4 h 8 min | 3 h 9 min | 2 h 33 min |
4K front only dash cams and 64GB+ cards
Check your camera's maximum supported card size before buying.
galphi 4K Dash Cam Front, 5GHz WiFi, 32GB Card Included, Mini Dashcam4K / front only / Wi-Fi$49.98Check price on Amazon
THINKWARE U3000 4K Dash Cam Front, Sony STARVIS 2, Radar, GPS, WDR4K / front only / GPS$379.99Check price on Amazon
THINKWARE U3000 PRO Dash Cam 4K Front, Sony STARVIS 2, Radar, GPS4K / front only / GPS$479.99Check 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
Integral 128GB High Endurance microSD Card for CCTV, Dash Cam & Security Cameras, 4K...128GB / high endurance$38.95Check price on Amazon
Other card and camera combinations
Frequently asked questions
Is 64GB enough for a 4K front only dash cam?
64GB keeps about 4 h 8 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 64GB 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 4 h 8 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 32 Mbps. Some 4K 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.