A picojoule (pJ) is a metric-prefixed unit of energy equal to 10-12 joules, a fraction of a single joule, using the SI pico prefix.
Picojoules to Kilowatt hours
Convert Picojoule (pJ) to Kilowatt-hour (kWh) instantly with an exact formula, conversion table, and FAQ.
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Convert picojoules (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 × 2.777777778e-19
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Formula
kWh = pJ × 2.777777778e-19
pJ = kWh × 3.600000000e+18
Conversion table
| 1 pJ | 2.777778e-19 kWh |
| 5 pJ | 1.388889e-18 kWh |
| 10 pJ | 2.777778e-18 kWh |
| 20 pJ | 5.555556e-18 kWh |
| 50 pJ | 1.388889e-17 kWh |
| 100 pJ | 2.777778e-17 kWh |
| 500 pJ | 1.388889e-16 kWh |
| 1000 pJ | 2.777778e-16 kWh |
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How the formula works
Both picojoule and kilowatt-hour measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in picojoules by 2.777777778e-19 to get kilowatt hours. To reverse the conversion, multiply a kilowatt-hour value by 3.600000000e+18 to get back to picojoules.
Frequently asked questions
What is Picojoule (pJ)?
A picojoule (pJ) is a metric-prefixed unit of energy equal to 10-12 joules, a fraction of a single joule, using the SI pico 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 picojoules to kilowatt hours?
Multiply the picojoule value by 2.777777778e-19 to get the equivalent in kilowatt hours. For example, 5 pJ × 2.777777778e-19 = 1.388889e-18 kWh.
Is this conversion exact?
Yes. Both units are defined against the SI base unit for this dimension, so the factor 2.777777778e-19 is an exact, non-rounded value.
Can I convert kilowatt hours back to picojoules?
Yes. Divide the kilowatt-hour value by 2.777777778e-19, or multiply it by 3.600000000e+18, to get picojoules.
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About converting picojoules to kilowatt hours
A picojoule (pJ) is a metric-prefixed unit of energy equal to 10-12 joules, a fraction of a single joule, using the SI pico 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 picojoules 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.