Command to count active DHCP leases

[Mypfsense2016]

Hi all,
I want to get the number of active DHCP leases. E.g: The DHCP IPs that clients are using and the DHCP server can't not reclaim yet.

I use the following command. But it seems not accurate yet.
grep active /var/dhcpd/var/db/dhcpd.leases | wc -l

Any idea?
Thanks a lot.

[johnpoz]

If your wanting to keep an eye on the number of leases your using and such.. I would think you would want to turn on the graphing feature for dhcp.

Or if you just go to status leases, at the bottom you can get a count from each dhcp pool - is that what your looking for?

[Mypfsense2016]

Normally, I only access pfsense remotely.
Nevermind, I will see the code in the page you suggest and figure out how to count in batch shell.
Thanks a lot.