Milliwatts to Joules (mW → J)
Formula
1 mW = 0.001 JConversion Table
| mW | J |
|---|---|
| 0 | 0 |
| 1.0000 | 0.0010000 |
| 2.0000 | 0.0020000 |
| 3.0000 | 0.0030000 |
| 4.0000 | 0.0040000 |
| 5.0000 | 0.0050000 |
| 6.0000 | 0.0060000 |
| 7.0000 | 0.0070000 |
| 8.0000 | 0.0080000 |
| 9.0000 | 0.0090000 |
| 10.000 | 0.010000 |
| 11.000 | 0.011000 |
| 12.000 | 0.012000 |
| 13.000 | 0.013000 |
| 14.000 | 0.014000 |
| 15.000 | 0.015000 |
| 16.000 | 0.016000 |
| 17.000 | 0.017000 |
| 18.000 | 0.018000 |
| 19.000 | 0.019000 |
| mW | J |
|---|---|
| 20.000 | 0.020000 |
| 21.000 | 0.021000 |
| 22.000 | 0.022000 |
| 23.000 | 0.023000 |
| 24.000 | 0.024000 |
| 25.000 | 0.025000 |
| 26.000 | 0.026000 |
| 27.000 | 0.027000 |
| 28.000 | 0.028000 |
| 29.000 | 0.029000 |
| 30.000 | 0.030000 |
| 31.000 | 0.031000 |
| 32.000 | 0.032000 |
| 33.000 | 0.033000 |
| 34.000 | 0.034000 |
| 35.000 | 0.035000 |
| 36.000 | 0.036000 |
| 37.000 | 0.037000 |
| 38.000 | 0.038000 |
| 39.000 | 0.039000 |
| mW | J |
|---|---|
| 40.000 | 0.040000 |
| 41.000 | 0.041000 |
| 42.000 | 0.042000 |
| 43.000 | 0.043000 |
| 44.000 | 0.044000 |
| 45.000 | 0.045000 |
| 46.000 | 0.046000 |
| 47.000 | 0.047000 |
| 48.000 | 0.048000 |
| 49.000 | 0.049000 |
| 50.000 | 0.050000 |
| 51.000 | 0.051000 |
| 52.000 | 0.052000 |
| 53.000 | 0.053000 |
| 54.000 | 0.054000 |
| 55.000 | 0.055000 |
| 56.000 | 0.056000 |
| 57.000 | 0.057000 |
| 58.000 | 0.058000 |
| 59.000 | 0.059000 |
| mW | J |
|---|---|
| 60.000 | 0.060000 |
| 61.000 | 0.061000 |
| 62.000 | 0.062000 |
| 63.000 | 0.063000 |
| 64.000 | 0.064000 |
| 65.000 | 0.065000 |
| 66.000 | 0.066000 |
| 67.000 | 0.067000 |
| 68.000 | 0.068000 |
| 69.000 | 0.069000 |
| 70.000 | 0.070000 |
| 71.000 | 0.071000 |
| 72.000 | 0.072000 |
| 73.000 | 0.073000 |
| 74.000 | 0.074000 |
| 75.000 | 0.075000 |
| 76.000 | 0.076000 |
| 77.000 | 0.077000 |
| 78.000 | 0.078000 |
| 79.000 | 0.079000 |
Milliwatts to Joules Conversion
Converting Milliwatts (mW) to Joules (J) is a common energy and power conversion. 1 mW equals 0.001 J. For example, 100 mW is equal to 0.1 J.
Quick Mental Math: Milliwatts to Joules
Multiply watts by seconds to get joules; one watt for one second equals one joule.
Why is converting Milliwatts to Joules tricky?
Watts are power (energy per second), not energy itself; time must be included.
Quick Reference Values
1 mW = 0.001 J. 5 mW = 0.005 J. 10 mW = 0.01 J. 25 mW = 0.025 J. 50 mW = 0.05 J. 100 mW = 0.1 J.
What is Milliwatts?
Milliwatts (mW) is a unit of energy and power. The milliwatt is a unit of power equal to one-thousandth of a watt, or 0.001 watts. It measures the rate of energy transfer or conversion and is derived directly from the SI base unit watt, which equals one joule per second. Milliwatts are frequently used in electronics and telecommunications to measure low power outputs [bipm-si-brochure]. The watt was named after James Watt and standardized in the late 19th century during the development of the SI system. The milliwatt emerged as a convenient subdivision for low-power electronic devices and instrumentation [bipm-si-brochure]. Milliwatts are standard in electronics, laser devices, and radio communications worldwide. Regulatory agencies and manufacturers specify power levels of small devices, such as laser pointers and Bluetooth transmitters, using milliwatts [nist-si-guide].
What is Joules?
Joules (J) is a unit of energy and power. The joule is the SI unit of energy defined as the work done when a force of one newton moves an object one meter in the direction of the force. It equals one kilogram meter squared per second squared (kg·m²/s²). This definition aligns with the International System of Units as standardized by the BIPM [bipm-si-brochure]. The joule is named after James Prescott Joule, a 19th-century physicist who studied energy conservation. It was officially adopted as a unit of energy by the CGPM in 1948 to unify energy measurement standards internationally [cgpm-resolutions]. Joules are used worldwide in physics, engineering, and electrical industries to quantify energy, work, and heat. Countries using the SI system, including those in Europe, Asia, and the Americas, rely on joules for scientific and industrial applications [nist-si-guide].
Common Misspellings
People often search for this conversion using these alternate spellings: milliwatt, milwatt, milliwat, milwatts, joule, joul, jouls, juls. All of these refer to the Milliwatts to Joules conversion.