How to know the electricity consumption of the meter in a month by measuring the current in front of the meter with a clamp ammeter?

How to know the electricity consumption of the meter in a month by measuring the current in front of the meter with a clamp ammeter?

220 voltage is 1 kW per hour, that is 4.5 A, 4.5 a per hour, 380 voltage is 1 kW per hour, 1 kW per hour, 2 current per hour, 2 current per hour, it depends on how many hours you walk!

Can clamp ammeter measure current

Clamp ammeter is used to measure current, only AC current, and it is the current on a single wire, so it can't do anything about DC current

How to measure the circuit on and off of clamp ammeter
What is displayed indicates that the circuit is on

The clamp ammeter can measure AC current. When there should be current and the reading is zero (excluding the meter problem), it can judge that the circuit is blocked