Petahertz is 1000000000000000 hertz units.
Petahertz to Exahertz Converter — PHz to EHz
Convert Petahertz (PHz) to Exahertz (EHz) using the exact conversion factor (1 petahertz = 0.001 exahertz). See the formula, worked examples, and conversion table.
Petahertz to Exahertz converter
Converter
Scientific Units Converter
Convert SI derived units, scientific notation-friendly units, atomic units, and lab measurements.
Context values
Some unit families need one extra value for a physically accurate result.
Exahertz is 1000000000000000000 hertz units.
Result = input x 1e+15 / 1e+18.
Frequency units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Petahertz to Exahertz
Petahertz and Exahertz are both scientific-measurement units, spanning everything from atomic and laboratory scales to astronomical distances — the kind of conversion that comes up constantly in physics, chemistry, and astronomy when a result needs to move between conventions used in different subfields. Specifically: Petahertz is 1000000000000000 hertz units, and exahertz is 1000000000000000000 hertz units.
Formula
exahertz = petahertz × 0.001
This factor comes from each unit's defined relationship to the category's base unit: 1 petahertz equals 1e+15 base units, and 1 exahertz equals 1e+18 base units, so dividing one by the other gives the direct petahertz-to-exahertz factor of 0.001.
Simple example
1 PHz × 0.001 = 0.001 EHz
1 petahertz = 0.001 exahertz.
Real-world example
10 PHz × 0.001 = 0.01 EHz
10 petahertz = 0.01 exahertz.
Conversion table
| Petahertz (PHz) | Exahertz (EHz) |
|---|---|
| 0.001 PHz | 0.000001 EHz |
| 0.01 PHz | 0.00001 EHz |
| 1 PHz | 0.001 EHz |
| 10 PHz | 0.01 EHz |
| 100 PHz | 0.1 EHz |
| 1,000 PHz | 1 EHz |
Reverse conversion: Exahertz to Petahertz
0.001 EHz × 1000 = 1 PHz
0.001 exahertz = 1 petahertz.
petahertz = exahertz × 1000
For a page dedicated to this direction, see Exahertz to Petahertz.
Understanding the Petahertz (PHz)
Petahertz is 1000000000000000 hertz units.
Understanding the Exahertz (EHz)
Exahertz is 1000000000000000000 hertz units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many exahertz are in 1 petahertz?
1 petahertz equals 0.001 exahertz, using the exact defined conversion factor rather than an estimate.
How do I convert petahertz to exahertz?
Multiply the petahertz value by 0.001. The converter above does this instantly to whatever precision you set.
How do I convert exahertz back to petahertz?
Use the reverse factor: 1 exahertz equals 1,000 petahertz. You can also use the swap control in the converter above to flip the direction instantly.
What is a petahertz?
Petahertz (PHz) is a unit of scientific units.
What is a exahertz?
Exahertz (EHz) is a unit of scientific units.
Is the petahertz to exahertz conversion exact?
Yes. Both petahertz and exahertz 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.
Why does this category span everything from atomic to astronomical scales?
Scientific work spans an enormous range of physical scales, from atomic distances (measured in angstroms or atomic mass units) to interstellar distances (measured in astronomical units or parsecs), so this category groups SI-derived and scale-specific units that researchers commonly need to convert between within their field.