Farads per meter to relative permittivity (dielectric constant)
Type a value in F/m to get it in εr instantly.
4.969×10¹¹εr
That's 414,116,658× as polarizable as barium titanate ceramic — nothing on our list beats it. A signal in it travels at about 0.0001419% of the speed of light.
Convert the other way: εr to F/m
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 F/m to εr
To convert farads per meter to relative permittivity (dielectric constant), multiply by 1.129×10¹¹.
Example: 4.4 F/m × 1.129×10¹¹ = 4.969×10¹¹ εr.
In the other direction, 1 εr = 8.854×10⁻¹² F/m.
Every unit
Your permittivity in every unit
Tables
F/m to εr conversion table
| F/m | εr |
|---|---|
| 1 F/m | 1.129×10¹¹ εr |
| 1.5 F/m | 1.694×10¹¹ εr |
| 2 F/m | 2.259×10¹¹ εr |
| 2.1 F/m | 2.372×10¹¹ εr |
| 3 F/m | 3.388×10¹¹ εr |
| 4 F/m | 4.518×10¹¹ εr |
| 4.4 F/m | 4.969×10¹¹ εr |
| 6 F/m | 6.776×10¹¹ εr |
| 10 F/m | 1.129×10¹² εr |
| 20 F/m | 2.259×10¹² εr |
| 50 F/m | 5.647×10¹² εr |
| 80 F/m | 9.035×10¹² εr |
εr to F/m conversion table
| εr | F/m |
|---|---|
| 1 εr | 8.854×10⁻¹² F/m |
| 1.5 εr | 1.328×10⁻¹¹ F/m |
| 2 εr | 1.771×10⁻¹¹ F/m |
| 2.1 εr | 1.859×10⁻¹¹ F/m |
| 3 εr | 2.656×10⁻¹¹ F/m |
| 4 εr | 3.542×10⁻¹¹ F/m |
| 4.4 εr | 3.896×10⁻¹¹ F/m |
| 6 εr | 5.313×10⁻¹¹ F/m |
| 10 εr | 8.854×10⁻¹¹ F/m |
| 20 εr | 1.771×10⁻¹⁰ F/m |
| 50 εr | 4.427×10⁻¹⁰ F/m |
| 80 εr | 7.083×10⁻¹⁰ F/m |
Quick answers
Quick answers
- How many εr is 1 F/m?
- 1 F/m is 1.129×10¹¹ εr.
- How many εr is 10 F/m?
- 10 F/m is 1.129×10¹² εr.
- How many εr is 4.4 F/m?
- 4.4 F/m is 4.969×10¹¹ εr.
The units
About these units
Farads per meter (F/m)
The SI unit of absolute permittivity.
Relative permittivity (dielectric constant) (εr)
Compared with a vacuum, which is exactly 1.
Keep going