I was just settling up with the owner of the condo I rented for a month and we were figuring out the cost of the electric as we read the meter when I moved in.  

I used 330 units (KWh) and to figure out the cost per unit we divided her previous bill by the previous months units.  

925 baht/250 units = 3.7 baht per unit.  So we multiplied the number of units I used by 3.7 baht.

However, that seems cheap to me.  In my condo in Bangkok I pay direct to EGAT at about 4.5 baht per unit.  

I want to pay her the correct amount.  Is electricity cheaper in Chiang Mai than in Bangkok?   Did I make an error in calculation?

Thanks!

Electricity cost is identical nationwide (for same tariff class).

There is an online calculator.
Unfortunately the English version is buggy.
Thai version:
http://www.mea.or.th/aboutelectric/index.php?l=th&tid=4&mid=280&pid=116&ctForm=form12

The usual household tariff is "1.2".

If you enter 330 kWh you get 1,257.83 Baht in total = 3.8 Baht/kWh

For tariff 1.1: 1,259.58  Baht (no significant diff.).

The tariffs are progressive (incr. cost per unit with rising consumption).
That's why the simple math does not work correctly.

Unit costs also vary by a "Ft" surcharge(deduction) which is adjusted every 4 months.
4.5 Baht/kWh sounds plausible for a "high" consumption.

 

 

I just checked our bill for a private home; 2021 baht for 508 units = 3.978

Thanks.  I guess it was about right then.

2 minutes ago, ramrod711 said:

I just checked our bill for a private home; 2021 baht for 508 units = 3.978

Thx. That confirms that the online calc. is correct ( 2,021.61 ).

758.51 for 210 units......3.611....it has worked out to more like 4.15 before.  Throw her a bone and call it four.....I saw apartments charging 13 per unit in BKK 11 years ago.