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An em is a unit in the field of typography, equal to the currently specified point size. For example, one em in a 16-point typeface is 16 points. Therefore, this unit is the sa ..more definition+
In relation to the base unit of [length] => (meters), 1 Femtometers (fm) is equal to 1.0E-15 meters, while 1 Ems (EM) = 0.0042175176 meters.| 4 Femtometers | to common length units |
|---|---|
| 4 fm | = 4.0E-15 meters (m) |
| 4 fm | = 4.0E-18 kilometers (km) |
| 4 fm | = 4.0E-13 centimeters (cm) |
| 4 fm | = 1.3123359580052E-14 feet (ft) |
| 4 fm | = 1.5748031496063E-13 inches (in) |
| 4 fm | = 4.3744531933508E-15 yards (yd) |
| 4 fm | = 2.4854847689493E-18 miles (mi) |
| 4 fm | = 4.227882887644E-31 light years (ly) |
| 4 fm | = 1.5118112140865E-11 pixels (PX) |
| 4 fm | = 2.5E+20 planck length (pl) |