**Unit Conversions**

**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

We provided some other questions on other topics also. Click on the Next/Previous link to get more Question Answer session.

Please visit this page to get updates on more Math Shortcut Tricks and its uses.You can also like our facebook page to get updates.

If you have any question regarding this topic then please do comment on below section.You can also send us message on facebook.

Thanks due to this I taught easily