Relative permittivity (dielectric constant) to picofarads per meter
Type a value in εr to get it in pF/m instantly.
38.96pF/m
That's about the same as FR-4 circuit board. A signal in it travels at about 47.67% of the speed of light.
Convert the other way: pF/m to εr
What it means
How strongly does it polarize?
Values are typical at low frequency and room temperature. Water’s permittivity falls sharply at microwave frequencies, which is how microwave ovens heat it.
The math
How to convert εr to pF/m
To convert relative permittivity (dielectric constant) to picofarads per meter, multiply by 8.85419.
Example: 4.4 εr × 8.85419 = 38.9584 pF/m.
In the other direction, 1 pF/m = 0.112941 εr.
Every unit
Your permittivity in every unit
Tables
εr to pF/m conversion table
| εr | pF/m |
|---|---|
| 1 εr | 8.85419 pF/m |
| 1.5 εr | 13.2813 pF/m |
| 2 εr | 17.7084 pF/m |
| 2.1 εr | 18.5938 pF/m |
| 3 εr | 26.5626 pF/m |
| 4 εr | 35.4168 pF/m |
| 4.4 εr | 38.9584 pF/m |
| 6 εr | 53.1251 pF/m |
| 10 εr | 88.5419 pF/m |
| 20 εr | 177.084 pF/m |
| 50 εr | 442.709 pF/m |
| 80 εr | 708.335 pF/m |
pF/m to εr conversion table
| pF/m | εr |
|---|---|
| 1 pF/m | 0.112941 εr |
| 1.5 pF/m | 0.169411 εr |
| 2 pF/m | 0.225882 εr |
| 2.1 pF/m | 0.237176 εr |
| 3 pF/m | 0.338823 εr |
| 4 pF/m | 0.451764 εr |
| 4.4 pF/m | 0.49694 εr |
| 6 pF/m | 0.677645 εr |
| 10 pF/m | 1.12941 εr |
| 20 pF/m | 2.25882 εr |
| 50 pF/m | 5.64705 εr |
| 80 pF/m | 9.03527 εr |
Quick answers
Quick answers
- How many pF/m is 1 εr?
- 1 εr is 8.85419 pF/m.
- How many pF/m is 10 εr?
- 10 εr is 88.5419 pF/m.
- How many pF/m is 4.4 εr?
- 4.4 εr is 38.9584 pF/m.
The units
About these units
Relative permittivity (dielectric constant) (εr)
Compared with a vacuum, which is exactly 1.
Picofarads per meter (pF/m)
A friendlier size: a vacuum is 8.854 pF/m.
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