## Unit Conversions

Here are some basic concepts of Unit Conversion.

Here are some basic concepts of Unit Conversion.

**LENGTH**

km = Kilometer

m = Meter

- cm = centimeter
- 1 km = 1000 m
- 1 m = 100 cm
- 1 cm = 0.01 m = 10
^{-2}m - 1 mm = 10
^{-3}m - 1µm = 10
^{-6}m - 1 mµ = 1 nm = 10
^{-9}m - a angstrom (A) = 10
^{-10}m - 1 inch (in) = 2.54 cm
- 1 foot (ft) = 30.48 cm
- 1 cm = 0.3937 in
- 1 m = 39.37 in
- 1 Km = 0.6214 mi (mile)
- 1 yard = 0.9144 m
- 1.6 m = 5.24 ft
- 1.8 m = 5.9 ft
- 1 mile = 1.6.9 Km
- 1 nautical mile (NM) = 1.852 Km

10^{-1} m | dm | decimeter | 10^{1} m | dam | decameter |

10^{-2} m | cm | centimeter | 10^{2} m | hm | hectometer |

10^{-3} m | mm | millimeter | 10^{3} m | km | kilometer |

10^{-6} m | μm | micrometer | 10^{6} m | Mm | megameter |

10^{-9} m | nm | nanometer | 10^{9} m | Gm | gigameter |

10^{-12} m | pm | picometer | 10^{12} m | Tm | terameter |

10^{-15} m | fm | femtometer | 10^{15} m | Pm | petameter |

10^{-18} m | am | attometer | 10^{18} m | Em | exameter |

10^{-21} m | zm | zeptometer | 102^{1} m | Zm | zettameter |

10^{-24} m | ym | yoctometer | 10^{24} m | Ym | yottameter |

**VOLUME**

- 1 liter(l) = 1000 cm
^{3}= 1.057 quart(qt) = 61.02 in^{3}= 0.03532 ft^{3} - 1 m
^{3}= 1000 l = 35.32 ft^{3 } - 1 ft
^{3}= 7.481 U.S. gal = 0.02832 m^{3}= 2832 l - 1 U.S. gallon(gal) = 231 in
^{3}= 3.785 l

**TIME**

- 1 hour = 60 minutes = 3600 seconds
- 1 day = 24 hours
- 1 month ≈ 30 days
- 1 year ≈ 365 days ≈ 52 weeks = 12 months

**MASS**

- 1 ton = 1000 kg
- 1 Kilogram (kg) = 2.2 pounds (lb) = 0.0685 slug
- 1 lb = 453.6 gm = 0.031 slug
- 1 slug = 32.174 lb = 14.59 kg
- 1 lb = 16 ounce (oz)
- 1 troy ounce = 31.1034768 gram

table SI Unit

**SPEED**

- Km/h =Kilometer per hour
- 1 km/h = 0.2778 m/sec = 0.6214 mi/h = 0.9113 ft/sec
- 1 mi/h = 1.609 Km/h = 1.467 ft/sec = 0.4470 m/sec
- 1 knot = 1 nautical mile / hour = 1.852 km/h

**DENSITY**

1 lb/ft^{3} = 0.01602 gm/cm^{3}

1 slug/ft^{3} = 0.5154 gm/cm^{3}

1 gm/cm^{3} = 10^{3} kg/m^{3} = 62.43 lb/ft^{3}

**FORCE**

1 long ton = 2240 lbwt

1 metric ton = 2205 lbwt

1 newton(nt) = 10^{5} dynes = 0.1020 kgwt = 0.5548 lbwt

1 pound weight (lbwt) = 4.448nt = 0.4536 kgwt = 32.17 poundals

1 kilogram weight (kgwt) = 2.205 lbwt = 9.807 nt

**TEMPERATURE**

0^{o} = 32^{o} F = 273 K

20^{o} C = 68^{o} F

**ENERGY**

1 electron volt (ev) = 1.602 x 10^{-19} joule

1 Kilowatt hour (kw hr) = 3.60 x 10^{6} joules = 860.0 kcal = 3413 Btu

1Btu (British thermal unit) = 778 ft lbwt = 1055 joules = 0.293 watt hr

1 joule = 1 ny m = 10^{7} ergs = 0.7376 ft lbwt = 0.2389 cal = 9.481 x 10^{-4} Btu

1 ft lbwt = 1.356 joules = 0.3239 cal = 1.285 x 10^{-3} Btu

**PRESSURE**

1 nt/m^{2} = 10dynes/cm^{2} = 90869 x 10^{-6} atmosphere = 2.089 x 10^{-2} lbwt/ft^{2}

1 atm = 1.013 x 10^{5} nt/m^{2}

= 1.013 x 10^{6} dynes/cm^{2}

1470 lbwt/in^{2}

76 cm mercury

= 406.8 in water

1 lbwt/in^{2} = 6895 nt/m^{2} = 5.171 cm mercury

= 27.68 in water

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Thanks due to this I taught easily

How to lagic multiple or decision meter to cm