A Femtowatt (fW) equals 1e-15 watt(s), a scaled unit of electrical power used for femto-scale electrical work.
Femtowatts to Yoctowatts
Convert Femtowatt (fW) to Yoctowatt (yW) instantly with an exact formula, conversion table, and FAQ.
Reserved for a responsive leaderboard above the conversion details.
Professional calculator style
World-scale conversion engine
30+ categories
6,500+ units
Instant results
Offline ready
Electrical calculator
Electricity Converter
Convert femtowatts (fW) to yoctowatts (yW) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A Yoctowatt (yW) equals 1e-24 watt(s), a scaled unit of electrical power used for yocto-scale electrical work.
yW = fW × 1.000000e+09
Results update instantly for Femtowatts to Yoctowatts conversions.
Reserved above the conversion cards and below the converter.
Formula
yW = fW × 1.000000e+09
fW = yW × 1.000000e-09
Conversion table
| 1 fW | 1.000000e+09 yW |
| 5 fW | 5.000000e+09 yW |
| 10 fW | 1.000000e+10 yW |
| 20 fW | 2.000000e+10 yW |
| 50 fW | 5.000000e+10 yW |
| 100 fW | 1.000000e+11 yW |
| 500 fW | 5.000000e+11 yW |
| 1000 fW | 1.000000e+12 yW |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
How the formula works
Both femtowatt and yoctowatt measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in femtowatts by 1.000000e+09 to get yoctowatts. To reverse the conversion, multiply a yoctowatt value by 1.000000e-09 to get back to femtowatts.
Frequently asked questions
What is Femtowatt (fW)?
A Femtowatt (fW) equals 1e-15 watt(s), a scaled unit of electrical power used for femto-scale electrical work.
What is Yoctowatt (yW)?
A Yoctowatt (yW) equals 1e-24 watt(s), a scaled unit of electrical power used for yocto-scale electrical work.
How do I convert femtowatts to yoctowatts?
Multiply the femtowatt value by 1.000000e+09 to get the equivalent in yoctowatts. For example, 5 fW × 1.000000e+09 = 5.000000e+09 yW.
Is this conversion exact?
Yes. Both units use fixed, defined scale factors, so the factor 1.000000e+09 is an exact, non-rounded value.
Can I convert yoctowatts back to femtowatts?
Yes. Divide the yoctowatt value by 1.000000e+09, or multiply it by 1.000000e-09, to get femtowatts.
Reserved between the FAQ and the article so the page stays balanced.
About converting femtowatts to yoctowatts
A Femtowatt (fW) equals 1e-15 watt(s), a scaled unit of electrical power used for femto-scale electrical work. A Yoctowatt (yW) equals 1e-24 watt(s), a scaled unit of electrical power used for yocto-scale electrical work.
Use this calculator to move between femtowatts and yoctowatts accurately for homework, engineering, billing, or everyday electricity calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.