MihsabaHow to use
The calculator converts rated watts to kilowatt-hours, then multiplies energy by the price per kWh that you supply. Daily hours, days per month and appliance quantity produce daily, monthly and annual estimates.
- Enter appliance power in watts.
- Set daily running hours and monthly running days.
- Enter appliance quantity and your actual price per kWh.
- Calculate to see energy and cost by period.
How it is calculated
Example
A 1,500 W appliance running 5 h/day for 30 days at 0.15 per kWh uses 7.5 kWh/day and 225 kWh/month, for an estimated monthly cost of 33.75.
Important notes
This estimates energy at the entered running power. Thermostatic or variable-load appliances may not draw rated power continuously. No country tariff tiers, taxes or fees are assumed; enter the effective per-kWh rate relevant to you.
Frequently asked questions
How do watts become kWh?
Divide watts by 1,000 to get kW, then multiply by running hours.
Where do I get the kWh price?
Use your electricity bill or supplier tariff and enter the effective rate relevant to you.
Does this include tariff tiers or tax?
No. It is a generic calculator driven by the rate you enter.
Is this calculator free?
Yes. It is free to use and requires no account.