Power Factor Calculator
Calculate the power factor of an electrical system from real power and apparent power.
About the Power Factor Calculator
Numbers should not slow you down. The Power Factor Calculator does the arithmetic for you and shows the result live, so you can focus on the decision rather than the maths.
Energy comes in many units — joules, watt-hours, calories, BTU, and the kilowatt-hours on your electricity bill. This Power Factor Calculator converts between them so you can compare energy figures from different sources.
The conversion applies the exact factors between energy units, and because one kilowatt-hour equals 3.6 million joules, the calculator saves you from unwieldy manual math.
Pakistani households meet these units everywhere: electricity bills in kWh, gas bills in cubic metres or MMBTU, and appliance specs in watts. Converting between them is how you compare energy costs across fuel types.
The converter is the companion to this site's appliance and bill calculators — convert any figure to kWh and you can price it against your tariff.
Bookmark the Power Factor Calculator for the next time you need it, and explore the rest of GuruAlpha's 1,200+ calculators for related everyday maths.
How to convert energy units
- 1
Enter the energy value in the unit you have.
- 2
Select the unit to convert to.
- 3
Read the converted value, updated live.
Frequently Asked Questions
What is power factor?
Power factor = real power ÷ apparent power. A low power factor (below 0.9) means wasted capacity and, for commercial users, penalties from DISCOs.
How many kWh are in a joule?
One kilowatt-hour equals 3.6 million joules. Conversely, 1 joule is 0.000000278 kWh — tiny, which is why bills are in kWh rather than joules.