To calculate your bill from your meter reading, you need to follow these steps-
Check and note down the meter reading. This value is in kWh (KiloWatt Hour).
Check the last month’s reading on the last month’s bill
Subtract the last month’s reading from current month’s reading. This is the energy used by you since last month.
Now multiply the number obtained to charges per kWh. This will indicate your Total Energy Charge
Now add Total Energy Bill to the Fixed Monthly Charge. This will be your total bill.