A Yoctowatt (yW) equals 1e-24 watt(s), a scaled unit of electrical power used for yocto-scale electrical work.
Yoctowatts to Milliwatts
Convert Yoctowatt (yW) to Milliwatt (mW) instantly with an exact formula, conversion table, and FAQ.
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Convert yoctowatts (yW) to milliwatts (mW) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A Milliwatt (mW) equals 1/1,000 watt(s), a scaled unit of electrical power used for milli-scale electrical work.
mW = yW × 1.000000e-21
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Formula
mW = yW × 1.000000e-21
yW = mW × 1.000000e+21
Conversion table
| 1 yW | 1.000000e-21 mW |
| 5 yW | 5.000000e-21 mW |
| 10 yW | 1.000000e-20 mW |
| 20 yW | 2.000000e-20 mW |
| 50 yW | 5.000000e-20 mW |
| 100 yW | 1.000000e-19 mW |
| 500 yW | 5.000000e-19 mW |
| 1000 yW | 1.000000e-18 mW |
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How the formula works
Both yoctowatt and milliwatt measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in yoctowatts by 1.000000e-21 to get milliwatts. To reverse the conversion, multiply a milliwatt value by 1.000000e+21 to get back to yoctowatts.
Frequently asked questions
What is Yoctowatt (yW)?
A Yoctowatt (yW) equals 1e-24 watt(s), a scaled unit of electrical power used for yocto-scale electrical work.
What is Milliwatt (mW)?
A Milliwatt (mW) equals 1/1,000 watt(s), a scaled unit of electrical power used for milli-scale electrical work.
How do I convert yoctowatts to milliwatts?
Multiply the yoctowatt value by 1.000000e-21 to get the equivalent in milliwatts. For example, 5 yW × 1.000000e-21 = 5.000000e-21 mW.
Is this conversion exact?
Yes. Both units use fixed, defined scale factors, so the factor 1.000000e-21 is an exact, non-rounded value.
Can I convert milliwatts back to yoctowatts?
Yes. Divide the milliwatt value by 1.000000e-21, or multiply it by 1.000000e+21, to get yoctowatts.
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About converting yoctowatts to milliwatts
A Yoctowatt (yW) equals 1e-24 watt(s), a scaled unit of electrical power used for yocto-scale electrical work. A Milliwatt (mW) equals 1/1,000 watt(s), a scaled unit of electrical power used for milli-scale electrical work.
Use this calculator to move between yoctowatts and milliwatts accurately for homework, engineering, billing, or everyday electricity calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.