# Online calculators

## Inductance as a straight wire over the plain with one grounded end:

Inductance is used on UHF. Of course, we have to present this inductor as a segment of the transmission line to get the more right result. However, this formula has a reasonable accuracy.

The calculation formula is taken from the** ARRL Handbook For Radio Communications**:

= Inductance µH*L*= radius of the wire in inches*a*= length of the conductor parallel to the plain in inches*b*= height above the plain in inches*h*

Proposed below calculator uses this formula with sizes transformed in the metric system:

ENTER THE INPUT DATA:

b |
= | – The length of the conductor |

h |
= mm | – The height of the conductor |

d |
= mm | – The diameter of the wire |

L |
= |
– Inductance |

**Another similar calculators:**

Only on K7MEM's site calculation follows the same formula, but has an error: calculator uses wire diameter instead of radius.