Terawatt is 1000000000000 watt units.
Terawatts to Petawatts Converter — TW to PW
Convert Terawatt (TW) to Petawatt (PW) using the exact conversion factor (1 terawatt = 0.001 petawatt). See the formula, worked examples, and conversion table.
Terawatts to Petawatts converter
Converter
Electricity Converter
Convert electrical units by family and calculate voltage, current, resistance, power, and energy with context values.
Context values
Some unit families need one extra value for a physically accurate result.
Petawatt is 1000000000000000 watt units.
Result = input x 1e+12 / 1e+15.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Terawatts to Petawatts
Terawatt and Petawatt both belong to the electricity family — voltage, current, resistance, power, or energy — units that show up constantly when working across the different standards used by household wiring (120V/240V depending on region), automotive electrical systems (12V/24V), and electronics design. Specifically: Terawatt is 1000000000000 watt units, and petawatt is 1000000000000000 watt units.
Formula
petawatts = terawatts × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 terawatt equals 1e+12 base units, and 1 petawatt equals 1e+15 base units, so dividing one by the other gives the direct terawatt-to-petawatt factor of 0.001.
Simple example
1 TW × 0.001 = 0.001 PW
1 terawatt = 0.001 petawatts.
Real-world example
120 TW × 0.001 = 0.12 PW
120 terawatts = 0.12 petawatts.
Conversion table
| Terawatt (TW) | Petawatt (PW) |
|---|---|
| 1 TW | 0.001 PW |
| 5 TW | 0.005 PW |
| 12 TW | 0.012 PW |
| 24 TW | 0.024 PW |
| 120 TW | 0.12 PW |
| 240 TW | 0.24 PW |
Reverse conversion: Petawatt to Terawatt
0.001 PW × 1000 = 1 TW
0.001 petawatts = 1 terawatt.
terawatts = petawatts × 1000
For a page dedicated to this direction, see Petawatt to Terawatt.
Understanding the Terawatt (TW)
Terawatt is 1000000000000 watt units.
Understanding the Petawatt (PW)
Petawatt is 1000000000000000 watt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many petawatts are in 1 terawatt?
1 terawatt equals 0.001 petawatts, using the exact defined conversion factor rather than an estimate.
How do I convert terawatt to petawatt?
Multiply the terawatt value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert petawatt back to terawatt?
Use the reverse factor: 1 petawatt equals 1,000 terawatts. You can also use the swap control in the converter above to flip the direction instantly.
What is a terawatt?
Terawatt (TW) is a unit of electricity.
What is a petawatt?
Petawatt (PW) is a unit of electricity.
Is the terawatt to petawatt conversion exact?
Yes. Both terawatt and petawatt are defined by fixed standards rather than physical artifacts, so the factor of 0.001 used above is exact to as many digits as you choose to display.
What's the difference between voltage, current, and resistance?
Voltage (volts) is the electrical potential difference driving current through a circuit. Current (amperes) is the rate of flow of electric charge. Resistance (ohms) is how much a component opposes that flow. They're related by Ohm's law (V = I × R), but they are distinct physical quantities, and this page converts between units of just one of them.