Petawatt is 1000000000000000 watt units.
Petawatts to Terawatts Converter — PW to TW
Convert Petawatt (PW) to Terawatt (TW) using the exact conversion factor (1 petawatt = 1,000 terawatt). See the formula, worked examples, and conversion table.
Petawatts to Terawatts converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
Terawatt is 1000000000000 watt units.
Result = input x 1e+15 / 1e+12.
Power units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Petawatts to Terawatts
Petawatt and Terawatt both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: Petawatt is 1000000000000000 watt units, and terawatt is 1000000000000 watt units.
Formula
terawatts = petawatts × 1000
This factor comes from each unit's defined relationship to the category's base unit: 1 petawatt equals 1e+15 base units, and 1 terawatt equals 1e+12 base units, so dividing one by the other gives the direct petawatt-to-terawatt factor of 1000.
Simple example
1 PW × 1000 = 1,000 TW
1 petawatt = 1,000 terawatts.
Real-world example
100 PW × 1000 = 100,000 TW
100 petawatts = 100,000 terawatts.
Conversion table
| Petawatt (PW) | Terawatt (TW) |
|---|---|
| 1 PW | 1,000 TW |
| 10 PW | 10,000 TW |
| 50 PW | 50,000 TW |
| 100 PW | 100,000 TW |
| 500 PW | 500,000 TW |
| 1,000 PW | 1,000,000 TW |
Reverse conversion: Terawatt to Petawatt
1 TW × 0.001 = 0.001 PW
1 terawatt = 0.001 petawatts.
petawatts = terawatts × 0.001
For a page dedicated to this direction, see Terawatt to Petawatt.
Understanding the Petawatt (PW)
Petawatt is 1000000000000000 watt units.
Understanding the Terawatt (TW)
Terawatt is 1000000000000 watt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many terawatts are in 1 petawatt?
1 petawatt equals 1,000 terawatts, using the exact defined conversion factor rather than an estimate.
How do I convert petawatt to terawatt?
Multiply the petawatt value by 1000. The converter above does this instantly to whatever precision you set.
How do I convert terawatt back to petawatt?
Use the reverse factor: 1 terawatt equals 0.001 petawatts. You can also use the swap control in the converter above to flip the direction instantly.
What is a petawatt?
Petawatt (PW) is a unit of engineering.
What is a terawatt?
Terawatt (TW) is a unit of engineering.
Is the petawatt to terawatt conversion exact?
Yes. Both petawatt and terawatt are defined by fixed standards rather than physical artifacts, so the factor of 1000 used above is exact to as many digits as you choose to display.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.