An unexpectedly high electricity bill is a common shock. You can estimate the bill yourself from the units you use and the tariff, and spot problems early.
Step 1: Find units consumed
Units = current meter reading − previous reading. Both readings are printed on your bill; you can also read your meter mid-month to track usage.
Step 2: Apply the tariff
Residential tariffs are usually slab-based: the per-unit rate rises as monthly consumption increases. On top of the energy charge, a bill can include fuel price adjustment, taxes, duties and other charges. Rates are revised periodically, so use the latest figures for your distribution company.
Step 3: Estimate with the calculator
- Open the Electricity Bill Calculator.
- Enter units consumed (or both meter readings).
- Check the rate settings against your latest bill.
- See the estimated total.
Estimate appliance usage
Units (kWh) = watts ÷ 1,000 × hours used. For example, a 1,500 W air conditioner running 8 hours a day uses about 12 units daily, around 360 units a month.
Ways to reduce your bill
- Use an inverter AC set around 26°C.
- Switch to LED lights.
- Watch your units near slab limits; a few extra units can push you to a higher rate.
- Check for a faulty meter if units jump suddenly without a reason.
Related tools
Results are estimates. Your official bill from the distribution company is final.