convert KWH units to daily kw use

Er, divide by however many days there are in three months, then divide by the number of seconds in a day. 6.9 watts sounds about right.

Or 166Wh per day, whichever is preferable.

Your KW use will depend on your maximum demand at any stage in the period. Some utilities measure that separately.

Let us again make it clear that KW is the unit of power, ie it is instantaneous and KWH - energy - is the sum added over time.

Thus mathematically

KWH = ∫KW(t) dt

Thus we do not have any thing called daily KW usage. The maximum KW usage is OK (that is called maximum demand).

For an example-

I have a fridge (say 0.5KW - may be not sure), AC (1.5KW sure), Washing machine (1.5KW = sure) five fans (80W each) and four tube lights (40W) and few CFLs (14W, 8W etc) at my home.

the total demand when all are on sumultaneously will be around 4.5KW (that will be the maximum demand ever possible, except short circuits or other faults- then again I have the MCBs)

But are they always on?

We know that the Fridges are thermostat controlled and then it is on and off. The AC is generally on and then it is 1.5KW, but the washing machines are again at 1.5KW only on I think the spin cycle, or about 1 in heating cycle, otherwise very low (front loader) the fan, may be only one on at a time, washing m/c may not be on when the AC is on, lights- may be a couple of them at a time, and that too at a certain part of night and early morning.

Thus at any given instant the power consumed - that drawn by the individual equipments added up will be highly variable

say at one moment - Fridge (0.5)+AC(off=0)+ Washing m/c (normal wash cycle- 100W)

After 5 minutes - Fridge (offed by thermostat=0)+AC(0) + Washing M/C (spin=1.5)

after another 10 - Fridge (0)+ AC(too hot, somebody switched on = 1.5)+ Washing m/c( cycle over =0) + a light (40W) + one fan (80w).

See the variations?

Every thing is for the moment and a moment below or after could be something else.

BTW- over 3 months, only 15Units - looks to be too miserly .