fermtometer | 1 fm | 2 fm | 3 fm | 4 fm | 5 fm | 6 fm | 7 fm | 8 fm | 9 fm | 10 fm | 11 fm | 12 fm | 13 fm | 14 fm | 15 fm | 16 fm | 17 fm | 18 fm | 19 fm | 20 fm | 21 fm | 22 fm | 23 fm | 24 fm | 25 fm | 26 fm | 27 fm | 28 fm | 29 fm | 30 fm | 31 fm | 32 fm | 33 fm | 34 fm | 35 fm | 36 fm | 37 fm | 38 fm | 39 fm | 40 fm | 41 fm | 42 fm | 43 fm | 44 fm | 45 fm | 46 fm | 47 fm | 48 fm | 49 fm | 50 fm | 51 fm | 52 fm | 53 fm | 54 fm | 55 fm | 56 fm | 57 fm | 58 fm | 59 fm | 60 fm | 61 fm | 62 fm | 63 fm | 64 fm | 65 fm | 66 fm | 67 fm | 68 fm | 69 fm | 70 fm | 71 fm | 72 fm | 73 fm | 74 fm | 75 fm | 76 fm | 77 fm | 78 fm | 79 fm | 80 fm | 81 fm | 82 fm | 83 fm | 84 fm | 85 fm | 86 fm | 87 fm | 88 fm | 89 fm | 90 fm | 91 fm | 92 fm | 93 fm | 94 fm | 95 fm | 96 fm | 97 fm | 98 fm | 99 fm | 100 fm |
hand | 9.8425196850394 × 10-15 hand | 1.9685039370079 × 10-14 hand | 2.9527559055118 × 10-14 hand | 3.9370078740157 × 10-14 hand | 4.9212598425197 × 10-14 hand | 5.9055118110236 × 10-14 hand | 6.8897637795276 × 10-14 hand | 7.8740157480315 × 10-14 hand | 8.8582677165354 × 10-14 hand | 9.8425196850394 × 10-14 hand | 1.0826771653543 × 10-13 hand | 1.1811023622047 × 10-13 hand | 1.2795275590551 × 10-13 hand | 1.3779527559055 × 10-13 hand | 1.4763779527559 × 10-13 hand | 1.5748031496063 × 10-13 hand | 1.6732283464567 × 10-13 hand | 1.7716535433071 × 10-13 hand | 1.8700787401575 × 10-13 hand | 1.9685039370079 × 10-13 hand | 2.0669291338583 × 10-13 hand | 2.1653543307087 × 10-13 hand | 2.2637795275591 × 10-13 hand | 2.3622047244094 × 10-13 hand | 2.4606299212598 × 10-13 hand | 2.5590551181102 × 10-13 hand | 2.6574803149606 × 10-13 hand | 2.755905511811 × 10-13 hand | 2.8543307086614 × 10-13 hand | 2.9527559055118 × 10-13 hand | 3.0511811023622 × 10-13 hand | 3.1496062992126 × 10-13 hand | 3.248031496063 × 10-13 hand | 3.3464566929134 × 10-13 hand | 3.4448818897638 × 10-13 hand | 3.5433070866142 × 10-13 hand | 3.6417322834646 × 10-13 hand | 3.740157480315 × 10-13 hand | 3.8385826771654 × 10-13 hand | 3.9370078740157 × 10-13 hand | 4.0354330708661 × 10-13 hand | 4.1338582677165 × 10-13 hand | 4.2322834645669 × 10-13 hand | 4.3307086614173 × 10-13 hand | 4.4291338582677 × 10-13 hand | 4.5275590551181 × 10-13 hand | 4.6259842519685 × 10-13 hand | 4.7244094488189 × 10-13 hand | 4.8228346456693 × 10-13 hand | 4.9212598425197 × 10-13 hand | 5.0196850393701 × 10-13 hand | 5.1181102362205 × 10-13 hand | 5.2165354330709 × 10-13 hand | 5.3149606299213 × 10-13 hand | 5.4133858267717 × 10-13 hand | 5.511811023622 × 10-13 hand | 5.6102362204724 × 10-13 hand | 5.7086614173228 × 10-13 hand | 5.8070866141732 × 10-13 hand | 5.9055118110236 × 10-13 hand | 6.003937007874 × 10-13 hand | 6.1023622047244 × 10-13 hand | 6.2007874015748 × 10-13 hand | 6.2992125984252 × 10-13 hand | 6.3976377952756 × 10-13 hand | 6.496062992126 × 10-13 hand | 6.5944881889764 × 10-13 hand | 6.6929133858268 × 10-13 hand | 6.7913385826772 × 10-13 hand | 6.8897637795276 × 10-13 hand | 6.988188976378 × 10-13 hand | 7.0866141732283 × 10-13 hand | 7.1850393700787 × 10-13 hand | 7.2834645669291 × 10-13 hand | 7.3818897637795 × 10-13 hand | 7.4803149606299 × 10-13 hand | 7.5787401574803 × 10-13 hand | 7.6771653543307 × 10-13 hand | 7.7755905511811 × 10-13 hand | 7.8740157480315 × 10-13 hand | 7.9724409448819 × 10-13 hand | 8.0708661417323 × 10-13 hand | 8.1692913385827 × 10-13 hand | 8.2677165354331 × 10-13 hand | 8.3661417322835 × 10-13 hand | 8.4645669291339 × 10-13 hand | 8.5629921259843 × 10-13 hand | 8.6614173228346 × 10-13 hand | 8.759842519685 × 10-13 hand | 8.8582677165354 × 10-13 hand | 8.9566929133858 × 10-13 hand | 9.0551181102362 × 10-13 hand | 9.1535433070866 × 10-13 hand | 9.251968503937 × 10-13 hand | 9.3503937007874 × 10-13 hand | 9.4488188976378 × 10-13 hand | 9.5472440944882 × 10-13 hand | 9.6456692913386 × 10-13 hand | 9.744094488189 × 10-13 hand | 9.8425196850394 × 10-13 hand |
The femtometre (American spelling femtometer, symbol fm derived from the Danish and Norwegian word femten, "fifteen"+Ancient Greek: μέτρον, metrοn, "unit of measurement") is an SI unit of length equal to 10−15 metres, which means a quadrillionth of one. This distance can also be called a fermi and was so named in honour of physicist Enrico Fermi, as it is a typical length-scale of nuclear physics.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
fermtometer | fm | 1000 attometres = 1 femtometre = 1 fermi = 0.001 picometre = 1×10−15 metres 1000000 femtometres = 10 ångström = 1 nanometre. | ≡ 1×10-15 m | Metric system SI |
fermtometers | hands | fermtometers | hands |
---|---|---|---|
1 | ≡ 9.8425196850394E-15 | 4 | ≡ 3.9370078740157E-14 |
1.5 | ≡ 1.4763779527559E-14 | 4.5 | ≡ 4.4291338582677E-14 |
2 | ≡ 1.9685039370079E-14 | 5 | ≡ 4.9212598425197E-14 |
2.5 | ≡ 2.4606299212598E-14 | 5.5 | ≡ 5.4133858267717E-14 |
3 | ≡ 2.9527559055118E-14 | 6 | ≡ 5.9055118110236E-14 |
The hand is a non-SI unit of measurement of length standardized to 4 inches (101.6 mm). It is used to measure the height of horses in some English-speaking countries, including Australia, Canada, the Republic of Ireland, the United Kingdom and the United States.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
hand | ≡ 4 in | ≡ 0.1016 m | Metric system Non-SI |
hands | fermtometers | hands | fermtometers |
---|---|---|---|
1 | ≡ 1.016E+14 | 4 | ≡ 4.064E+14 |
1.5 | ≡ 1.524E+14 | 4.5 | ≡ 4.572E+14 |
2 | ≡ 2.032E+14 | 5 | ≡ 5.08E+14 |
2.5 | ≡ 2.54E+14 | 5.5 | ≡ 5.588E+14 |
3 | ≡ 3.048E+14 | 6 | ≡ 6.096E+14 |
fermtometers | hands |
---|---|
1 | ≡ 9.8425196850394 × 10-15 |
1.016 × 1014 | ≡ 1 |
Symbol | Definition |
---|---|
≡ | exactly equal |
≈ | approximately equal to |
= | equal to |
digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |