The amount of hard disk space needed for storing DVR video can be affected by factors like DVR's compression technology, image resolution (how many pixels on each image), how many frames/images the DVR captures per second and how many hours of recordings to keep per day. Even with the same compression algorithm, the amount of noise in the picture, the brightness, the movement of the objects and many other factors will all impact the size of the video file. This calculator provides an estimate, not an accurate projection, to be used by system integrators/installers as a reference in determining how much hard disk space to put into a DVR.
Please keep in mind, features like hard disk redundancy or raid configuration will further reduce the length of videos that can be stored by 50%. When in doubt, please consult our technical department.

Please use this tool for approximations only. Does not account for enviromental variables

  • 1 frame per second is the lowest frame rate recordable and 30 frames per second is the maximum which is real time
  • There is no real need to record in real time unless there are regulatory reasons as in case of government facilities or casinos
  • Recording at 1 frame per second is what traditional analog systems record

Camera Stream:


Camera Resolution:

QCIF (176x120)
CIF (352x240)
D1(4CIF) (704x480)
1 Megapixel (1280x1024)
2 Megapixel (1600x1200)
3 Megapixel (2048x1536)

VIdeo Quality:


Average Frame Size:


Number of Cameras:

-10 -1 +1 +10

Desired Storage (Number of Days) per Camera:

-10 -1 +1 +10

Frame Rate per Camera:


Hours Each Camera Will Record per Day:

Hours Per Day

Total Bandwidth Required:

Per Camera:

Estimated Storage: