Hi Victor,
EIGRP uses this formula to calculate the metric:
https://networklessons.com/eigrp/eigrp-k-values-formula/
Here is an example of a directly connected gigabit interface with a network that is advertised in EIGRP:
R1#show ip eigrp topology 192.168.12.0/24
EIGRP-IPv4 Topology Entry for AS(1)/ID(11.11.11.11) for 192.168.12.0/24
State is Passive, Query origin flag is 1, 1 Successor(s), FD is 2816
Descriptor Blocks:
0.0.0.0 (GigabitEthernet0/1), from Connected, Send flag is 0x0
Composite metric is (2816/0), route is Internal
Vector metric:
Minimum bandwidth is 1000000 Kbit
Total delay is 10 microseconds
Reliability is 255/255
Load is 1/255
Minimum MTU is 1500
Hop count is 0
Originating router is 11.11.11.11
You can see the metrics that are used for the formula (bandwidth and delay by default) and the FD which is 2816.
Rene