Use this free online calculator to convert Fermi to X Unit instantly. This all length conversions conversion tool provides accurate results for all your measurement needs.

Quick Reference

1 Fermi = 9.979e-3 X Unit

1 X Unit = 100.2072 Fermi

Fermi to X Unit Conversion Formula

To convert Fermi to X Unit, multiply by 9.979e-3.

X Unit = Fermi × 9.979e-3

Fermi = X Unit × 100.2072

To convert X Unit back to Fermi, divide by 9.979e-3 (or multiply by 100.2072).

About These Units

About Fermi

The Fermi was a metric unit of distance formerly used in atomic physics. One Fermi equals 10e-15 meter, or 1 femtometer. The unit was named after Enrico Fermi (1901-1954), the Italian-American physicist who built the first nuclear reactor.

About X Unit

The X-unit (symbol xu) is a unit of length formerly used to measure the wavelength of X-rays and gamma rays. The X-unit is approximately 1.0021×10-13 metre. Defined by the Swedish physicist Karl Manne Georg Siegbahn (1886-1978) in 1925, the X-unit could not at that time be measured directly; the definition was instead made in terms of the spacing between planes of the calcite crystals used in the measuring apparatus.

Fermi to X Unit Conversion Table

Fermi	X Unit	X Unit	Fermi
0.1	9.979e-4	0.1	10.0207
0.5	4.990e-3	0.5	50.1036
1	9.979e-3	1	100.2072
2	0.019959	2	200.4144
5	0.049897	5	501.0361
10	0.099793	10	1002.07
20	0.199586	20	2004.14
25	0.249483	25	2505.18
50	0.498966	50	5010.36
100	0.997932	100	10020.72
250	2.4948	250	25051.81
500	4.9897	500	50103.61
1000	9.9793	1000	100207.22

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