A kilowatt-hour (kWh) is the standard billing unit for electricity, equal to 1,000 watts sustained for one hour.
Kilowatt hours to Petajoules
Convert Kilowatt-hour (kWh) to Petajoule (PJ) instantly with an exact formula, conversion table, and FAQ.
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Convert kilowatt hours (kWh) to petajoules (PJ) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
PJ = kWh × 3.600000000e-09
Results update instantly for Kilowatt hours to Petajoules conversions.
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Formula
PJ = kWh × 3.600000000e-09
kWh = PJ × 277777777.8
Conversion table
| 1 kWh | 3.600000e-09 PJ |
| 5 kWh | 1.800000e-08 PJ |
| 10 kWh | 3.600000e-08 PJ |
| 20 kWh | 7.200000e-08 PJ |
| 50 kWh | 1.800000e-07 PJ |
| 100 kWh | 3.600000e-07 PJ |
| 500 kWh | 0.000002 PJ |
| 1000 kWh | 0.000004 PJ |
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How the formula works
Both kilowatt-hour and petajoule measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in kilowatt hours by 3.600000000e-09 to get petajoules. To reverse the conversion, multiply a petajoule value by 277777777.8 to get back to kilowatt hours.
Frequently asked questions
What is Kilowatt-hour (kWh)?
A kilowatt-hour (kWh) is the standard billing unit for electricity, equal to 1,000 watts sustained for one hour.
What is Petajoule (PJ)?
A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
How do I convert kilowatt hours to petajoules?
Multiply the kilowatt-hour value by 3.600000000e-09 to get the equivalent in petajoules. For example, 5 kWh × 3.600000000e-09 = 1.800000e-08 PJ.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 3.600000000e-09 is an exact, non-rounded value.
Can I convert petajoules back to kilowatt hours?
Yes. Divide the petajoule value by 3.600000000e-09, or multiply it by 277777777.8, to get kilowatt hours.
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About converting kilowatt hours to petajoules
A kilowatt-hour (kWh) is the standard billing unit for electricity, equal to 1,000 watts sustained for one hour. A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
Use this calculator to move between kilowatt hours and petajoules accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.