A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
Petajoules to Kilowatt hours
Convert Petajoule (PJ) to Kilowatt-hour (kWh) instantly with an exact formula, conversion table, and FAQ.
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Convert petajoules (PJ) to kilowatt hours (kWh) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A kilowatt-hour (kWh) is the standard billing unit for electricity, equal to 1,000 watts sustained for one hour.
kWh = PJ × 277777777.8
Results update instantly for Petajoules to Kilowatt hours conversions.
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Formula
kWh = PJ × 277777777.8
PJ = kWh × 3.600000000e-09
Conversion table
| 1 PJ | 2.777778e+08 kWh |
| 5 PJ | 1.388889e+09 kWh |
| 10 PJ | 2.777778e+09 kWh |
| 20 PJ | 5.555556e+09 kWh |
| 50 PJ | 1.388889e+10 kWh |
| 100 PJ | 2.777778e+10 kWh |
| 500 PJ | 1.388889e+11 kWh |
| 1000 PJ | 2.777778e+11 kWh |
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How the formula works
Both petajoule and kilowatt-hour measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in petajoules by 277777777.8 to get kilowatt hours. To reverse the conversion, multiply a kilowatt-hour value by 3.600000000e-09 to get back to petajoules.
Frequently asked questions
What is Petajoule (PJ)?
A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix.
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.
How do I convert petajoules to kilowatt hours?
Multiply the petajoule value by 277777777.8 to get the equivalent in kilowatt hours. For example, 5 PJ × 277777777.8 = 1.388889e+09 kWh.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 277777777.8 is an exact, non-rounded value.
Can I convert kilowatt hours back to petajoules?
Yes. Divide the kilowatt-hour value by 277777777.8, or multiply it by 3.600000000e-09, to get petajoules.
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About converting petajoules to kilowatt hours
A petajoule (PJ) is a metric-prefixed unit of energy equal to 1015 joules, using the SI peta prefix. A kilowatt-hour (kWh) is the standard billing unit for electricity, equal to 1,000 watts sustained for one hour.
Use this calculator to move between petajoules and kilowatt hours accurately for homework, engineering, billing, or everyday energy calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.