A Terawatt (TW) equals 1e+12 watt(s), a scaled unit of electrical power used for tera-scale electrical work.
Terawatts to Femtowatts
Convert Terawatt (TW) to Femtowatt (fW) 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 terawatts (TW) to femtowatts (fW) instantly with formula, conversion table, and FAQ.
Context values
Some unit families need one extra value for a physically accurate result.
A Femtowatt (fW) equals 1e-15 watt(s), a scaled unit of electrical power used for femto-scale electrical work.
fW = TW × 1.000000e+27
Results update instantly for Terawatts to Femtowatts conversions.
Reserved above the conversion cards and below the converter.
Formula
fW = TW × 1.000000e+27
TW = fW × 1.000000e-27
Conversion table
| 1 TW | 1.000000e+27 fW |
| 5 TW | 5.000000e+27 fW |
| 10 TW | 1.000000e+28 fW |
| 20 TW | 2.000000e+28 fW |
| 50 TW | 5.000000e+28 fW |
| 100 TW | 1.000000e+29 fW |
| 500 TW | 5.000000e+29 fW |
| 1000 TW | 1.000000e+30 fW |
Related conversions
Reserved between the cards and the FAQ so the page stays balanced.
How the formula works
Both terawatt and femtowatt measure the same physical quantity, so converting between them is a single multiplication. Multiply a value in terawatts by 1.000000e+27 to get femtowatts. To reverse the conversion, multiply a femtowatt value by 1.000000e-27 to get back to terawatts.
Frequently asked questions
What is Terawatt (TW)?
A Terawatt (TW) equals 1e+12 watt(s), a scaled unit of electrical power used for tera-scale electrical work.
What is Femtowatt (fW)?
A Femtowatt (fW) equals 1e-15 watt(s), a scaled unit of electrical power used for femto-scale electrical work.
How do I convert terawatts to femtowatts?
Multiply the terawatt value by 1.000000e+27 to get the equivalent in femtowatts. For example, 5 TW × 1.000000e+27 = 5.000000e+27 fW.
Is this conversion exact?
Yes. Both units use fixed, defined scale factors, so the factor 1.000000e+27 is an exact, non-rounded value.
Can I convert femtowatts back to terawatts?
Yes. Divide the femtowatt value by 1.000000e+27, or multiply it by 1.000000e-27, to get terawatts.
Reserved between the FAQ and the article so the page stays balanced.
About converting terawatts to femtowatts
A Terawatt (TW) equals 1e+12 watt(s), a scaled unit of electrical power used for tera-scale electrical work. A Femtowatt (fW) equals 1e-15 watt(s), a scaled unit of electrical power used for femto-scale electrical work.
Use this calculator to move between terawatts and femtowatts accurately for homework, engineering, billing, or everyday electricity calculations. The Universal Converter uses exact unit factors, so results stay consistent across the site.