Free tool
DVR Time Calculator
How far off is the DVR's clock, and when should you look for your footage? Made for your phone at the scene. Nothing you type leaves this page.
Checking your phone's clock...
1Check the DVR clock
Press Now when the DVR's seconds show :00, then type the time the DVR showed.
Enter both times to see how far off the DVR is.
2Find your footage
Enter when it happened. We'll tell you what time to search for on the DVR.
Check the DVR clock in step 1 first.
Did the clocks change since it happened?
Only matters if the clocks changed for daylight saving between the incident and your clock check, and the DVR didn't change its own clock.
Already know the difference?
Used instead of step 1 while filled in.
Turn a time on the footage into the real time
3Fill in your Video Download Guide
Add each address you check, then download the guide filled in, ready to print or save with the case.
The guide is made on your phone or computer. Nothing is sent anywhere, and this page forgets it all when you close the tab.
How long does this DVR keep video?
Find the oldest recording on the DVR. Both times are on the DVR's clock; leave the time now empty to use the DVR time from step 1.
Enter the oldest recording to see how long the DVR keeps video.
SAMM does this for every video
Record the DVR clock check once and S.A.M.M. shows the real time on every frame, in presentations, stills and the case report. Free trial for your agency.
For guidance only: note how you checked the clock, and confirm times against the footage.