 Convert Kilometres (km) to Fermis (fm) | km in fm
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# Let's convert Kilometres (km) to Fermis (fm)

This quick and easy calculator will convert Kilometres (km) to Fermis (fm) and show formula, brief history on the units and quick maths for the conversion.

## Quick Reference for Converting Kilometres to Fermis

Formula
fm = km x 1.0E+18
Quick Rough Maths
To get the Fermis, multiply the number of Kilometres by 1000000 trillion
Kilometres (km) in 1 Fermi
There are 0 Kilometres in 1 Fermi
Fermis (fm) in 1 Kilometre
There are 1.0E+18 Fermis in 1 Kilometre

## Unit Information

Kilometre
/ˈkɪləˌmiːtə,kɪˈlɒmɪtə/
Symbol: km
Unit System: SI

### What is the Kilometre?

The kilometre is a unit of length and is a multiple of the metre; an SI derived unit. It has the symbol km.

A kilometre is equal to 1000m, 1094 yards and 0.621 miles.

Kilometres is used to measure road distances in the US, though the UK is still using the imperial "sister" miles.

Fermi
/ˈfəːmi/
Symbol: fm
Unit System: Non-SI metric

### What is the Fermi?

The fermis is a unit of length in the non-SI metric system and uses the symbol fm.

One fermi is equal to 1×10−15m or 3.9370×10−14 in.

It is used to measure nuclear distances and was named after the Italian physicist Enrico Fermi (1901–1954). It has now been replaced with the SI-derived term femtometre.