Convert millijoule to watt-hour
Please provide values below to convert millijoule [mJ] to watt-hour [W*h], or Convert watt-hour to millijoule.
How to Convert Millijoule to Watt-Hour
1 mJ = 2.77777777777778e-07 W*h
Example: convert 15 mJ to W*h:
15 mJ = 15 × 2.77777777777778e-07 W*h = 4.16666666666667e-06 W*h
Millijoule to Watt-Hour Conversion Table
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Millijoule
A millijoule (mJ) is a unit of energy equal to one thousandth of a joule, where 1 joule equals 1 newton meter or 1 kg·m²/s².
History/Origin
The millijoule is derived from the SI base unit joule, with the prefix 'milli' indicating a factor of 10⁻³. It has been used in scientific and engineering contexts to measure small amounts of energy, especially in fields like electronics and biomechanics.
Current Use
The millijoule is commonly used today to quantify small energy quantities in electronics, biomedical applications, and energy measurements where precision at a small scale is required.
Watt-Hour
A watt-hour (W·h) is a unit of energy equal to the amount of energy transferred or used when one watt of power is sustained for one hour.
History/Origin
The watt-hour was established as a practical unit of energy measurement with the adoption of the International System of Units (SI) and has been used in electrical and energy industries to quantify energy consumption and storage since the 20th century.
Current Use
Watt-hours are commonly used to measure electrical energy consumption in household appliances, batteries, and energy storage systems, providing a convenient unit for billing, capacity ratings, and energy management.