Femtometer Conversions

A femtometer is 10⁻¹⁵ meters, the scale of atomic nuclei. A proton has a radius of about 0.84 fm.

From

To

1 fm = 1 × 10⁻¹⁵ m

Convert femtometers to other units

Each line shows how much 1 femtometer (fm) equals. Select a conversion for a calculator, formula and table.

Metric (SI)

Femtometer to Meter1 × 10⁻¹⁵ m
Femtometer to Kilometer1 × 10⁻¹⁸ km
Femtometer to Hectometer1 × 10⁻¹⁷ hm
Femtometer to Dekameter1 × 10⁻¹⁶ dam
Femtometer to Decimeter1 × 10⁻¹⁴ dm
Femtometer to Centimeter1 × 10⁻¹³ cm
Femtometer to Millimeter1 × 10⁻¹² mm
Femtometer to Micrometer1 × 10⁻⁹ µm
Femtometer to Micron1 × 10⁻⁹ µ
Femtometer to Nanometer0.000001 nm
Femtometer to Angstrom0.00001 Å
Femtometer to Picometer0.001 pm
Femtometer to Fermi1 fm
Femtometer to Attometer1,000 am
Femtometer to Megameter1 × 10⁻²¹ Mm
Femtometer to Gigameter1 × 10⁻²⁴ Gm
Femtometer to Terameter1 × 10⁻²⁷ Tm
Femtometer to Petameter1 × 10⁻³⁰ Pm
Femtometer to Exameter1 × 10⁻³³ Em

Imperial & US customary

Femtometer to Inch3.93701 × 10⁻¹⁴ in
Femtometer to Foot3.28084 × 10⁻¹⁵ ft
Femtometer to Yard1.09361 × 10⁻¹⁵ yd
Femtometer to Mile6.21371 × 10⁻¹⁹ mi
Femtometer to Kiloyard1.09361 × 10⁻¹⁸ kyd
Femtometer to Furlong4.97097 × 10⁻¹⁸ fur
Femtometer to Chain4.97097 × 10⁻¹⁷ ch
Femtometer to Rope1.64042 × 10⁻¹⁶ rope
Femtometer to Rod1.98839 × 10⁻¹⁶ rd
Femtometer to Perch1.98839 × 10⁻¹⁶ perch
Femtometer to Pole1.98839 × 10⁻¹⁶ pole
Femtometer to Fathom5.46807 × 10⁻¹⁶ ftm
Femtometer to Link4.97097 × 10⁻¹⁵ li
Femtometer to Hand9.84252 × 10⁻¹⁵ h
Femtometer to Mil3.93701 × 10⁻¹¹ mil
Femtometer to Microinch3.93701 × 10⁻⁸ µin

US survey units

Femtometer to Foot (US Survey)3.28083 × 10⁻¹⁵ ft (US)
Femtometer to Inch (US Survey)3.937 × 10⁻¹⁴ in (US)
Femtometer to Mile (US Survey)6.2137 × 10⁻¹⁹ mi (US)
Femtometer to Mile (Statute)6.2137 × 10⁻¹⁹ mi
Femtometer to League (Statute)2.07123 × 10⁻¹⁹ lea
Femtometer to Furlong (US Survey)4.97096 × 10⁻¹⁸ fur (US)
Femtometer to Chain (US Survey)4.97096 × 10⁻¹⁷ ch (US)
Femtometer to Rod (US Survey)1.98838 × 10⁻¹⁶ rd (US)
Femtometer to Link (US Survey)4.97096 × 10⁻¹⁵ li (US)
Femtometer to Fathom (US Survey)5.46806 × 10⁻¹⁶ ftm (US)

Nautical

Femtometer to Nautical Mile (international)5.39957 × 10⁻¹⁹ NM
Femtometer to Nautical Mile (UK)5.39612 × 10⁻¹⁹ NM (UK)
Femtometer to Nautical League (int.)1.79986 × 10⁻¹⁹ NL
Femtometer to Nautical League (UK)1.79871 × 10⁻¹⁹ NL (UK)

Astronomical

Femtometer to Astronomical Unit6.68459 × 10⁻²⁷ au
Femtometer to Light Year1.057 × 10⁻³¹ ly
Femtometer to Parsec3.24078 × 10⁻³² pc
Femtometer to Kiloparsec3.24078 × 10⁻³⁵ kpc
Femtometer to Megaparsec3.24078 × 10⁻³⁸ Mpc

Atomic & physics

Femtometer to A.u. of Length0.0000188973 a₀
Femtometer to X-unit0.00997924 xu

Historical & cloth

Femtometer to Ell8.74891 × 10⁻¹⁶ ell
Femtometer to Cubit (UK)2.18723 × 10⁻¹⁵ cubit
Femtometer to Span (cloth)4.37445 × 10⁻¹⁵ span
Femtometer to Finger (cloth)8.74891 × 10⁻¹⁵ finger
Femtometer to Nail (cloth)1.74978 × 10⁻¹⁴ nail
Femtometer to Barleycorn1.1811 × 10⁻¹³ barleycorn
Femtometer to League2.07124 × 10⁻¹⁹ lea
Femtometer to Arpent1.70877 × 10⁻¹⁷ arpent
Femtometer to Mile (Roman)6.75765 × 10⁻¹⁹ m.p.

Typography

Femtometer to Pica2.3622 × 10⁻¹³ pc
Femtometer to Point2.83465 × 10⁻¹² pt
Femtometer to Twip5.66929 × 10⁻¹¹ twip

Convert other units to femtometers