Use this free calculator to estimate savings based only on entered conventional and bldc wattages. Enter your power use and electricity rate to see the units, cost and formula.
Enter your details
Every input includes a simple explanation.
Private: the calculation runs in your browser. Your inputs are not sent to GharGanit.
Rated power can be different from average power while the appliance is running.
Voltage, automatic on-off cycling and equipment condition can change real use.
Use this as a budget estimate. The appliance label, how often it runs and all charges on your tariff determine the real bill.
Savings are the difference between the entered old and BLDC wattages over your own operating hours; payback is a simple, undiscounted comparison.
Compare measured or manufacturer-rated power at equivalent airflow and include installation or regulator replacement in the real upgrade cost.
Do not compare two fans at unequal speed or assume the example replacement price is a market quotation.
Energy (kWh) = watts × quantity × hours × days × operating factor ÷ 1,000
Compare measured or manufacturer-rated power at equivalent airflow and include installation or regulator replacement in the real upgrade cost.
Do not compare two fans at unequal speed or assume the example replacement price is a market quotation.
Use this as a budget estimate. The appliance label, how often it runs and all charges on your tariff determine the real bill.