Terahenry is 1000000000000 henry units.
Terahenrys to Petahenrys Converter — TH to PH
Convert Terahenry (TH) to Petahenry (PH) using the exact conversion factor (1 terahenry = 0.001 petahenry). See the formula, worked examples, and conversion table.
Terahenrys to Petahenrys 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.
Petahenry is 1000000000000000 henry 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 Terahenrys to Petahenrys
Terahenry and Petahenry 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: Terahenry is 1000000000000 henry units, and petahenry is 1000000000000000 henry units.
Formula
petahenrys = terahenrys × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 terahenry equals 1e+12 base units, and 1 petahenry equals 1e+15 base units, so dividing one by the other gives the direct terahenry-to-petahenry factor of 0.001.
Simple example
1 TH × 0.001 = 0.001 PH
1 terahenry = 0.001 petahenrys.
Real-world example
120 TH × 0.001 = 0.12 PH
120 terahenrys = 0.12 petahenrys.
Conversion table
| Terahenry (TH) | Petahenry (PH) |
|---|---|
| 1 TH | 0.001 PH |
| 5 TH | 0.005 PH |
| 12 TH | 0.012 PH |
| 24 TH | 0.024 PH |
| 120 TH | 0.12 PH |
| 240 TH | 0.24 PH |
Reverse conversion: Petahenry to Terahenry
0.001 PH × 1000 = 1 TH
0.001 petahenrys = 1 terahenry.
terahenrys = petahenrys × 1000
For a page dedicated to this direction, see Petahenry to Terahenry.
Understanding the Terahenry (TH)
Terahenry is 1000000000000 henry units.
Understanding the Petahenry (PH)
Petahenry is 1000000000000000 henry units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many petahenrys are in 1 terahenry?
1 terahenry equals 0.001 petahenrys, using the exact defined conversion factor rather than an estimate.
How do I convert terahenry to petahenry?
Multiply the terahenry value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert petahenry back to terahenry?
Use the reverse factor: 1 petahenry equals 1,000 terahenrys. You can also use the swap control in the converter above to flip the direction instantly.
What is a terahenry?
Terahenry (TH) is a unit of electricity.
What is a petahenry?
Petahenry (PH) is a unit of electricity.
Is the terahenry to petahenry conversion exact?
Yes. Both terahenry and petahenry 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.