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Unit Conversion Guide
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>> Unit Conversion Guide

Area | Length |Mass | Pressure | Speed| Temperature |Volume
Note: How to use the conversion factors: Enter a number in either box, then click the other box.

IMPORTANT NOTICE: Do not use the figures given here as sole source for any commercial (or legal) purpose involving cost, money, sales, purchase etc. Any consequences thereof are the sole responsibility of the person doing the calculation.

Area

To convert

Into

Multiply by

Examples:

square meters (m²) square centimeters (cm²) 10000 m² = cm²
square meters (m²) square feet (ft²) 10.763911 m² = ft²
square kilometers (km²) (statute) square miles (mi²) 0.386109 km²= mi²
square kilometers (km²) nautical square miles (nm²) 0.291181 km²= nm²
square kilometers (km²) acres 247.105381 km²= acres
(statute) square miles (mi²) acres 640.00 mi²= acres
acres square yards (yd²) 4840 acres= yd²
acres square feet (ft²) 43560 acres= ft²
hectares(ha) acres 2.47105381 hectares= acres
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Length

To convert

Into

Multiply by

Examples:

meters (m) centimeters (cm) 100 m= cm
meters (m) inches (in) 39.37008 m= in
meters (m) feet (ft) 3.280840 m= ft
meters (m) yard (yd) 1.093613 m= yd
kilometers (km) (statute) miles (mi) 0.621371 km= mi
kilometers (km) nautical miles (nm) 0.539612 km= nm
feet (ft) inches (in) 12.0 ft= in
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Mass

To convert

Into

Multiply by

Examples:

kilograms (kg) grams (g) 1000 kg= g
kilograms (kg) pounds (lb) 2.204627 kg= lb
grams (g) ounce (oz) 0.035274 g= oz
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Pressure

To convert

Into

Multiply by

Examples:

atmospheres (atm) millibar (mb) 1013.25 atm= mb
atmospheres (atm) feet of water (at 4°C) 33.90 atm= ftof water
atmospheres (atm) inches of mercury (at 0°C) 29.92 atm= in. of mercury
atmospheres (atm)  centimeters of mercury 76.0 atm= cmsof mercury
atmospheres (atm)  kgs/cm² 1.0333 atm= kgs/cm²
atmospheres (atm)  lbs/in² 14.70 atm= lbs/in²
atmospheres (atm)  tons/ft² 1.058 atm= tons/ft²
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Speed

To convert

Into

Multiply by

Examples:

kilometers/hour (km/h) meters/second (m/s) 0.277778 km/h= m/s
kilometers/hour (km/h) miles/hour (mi/hr) 0.6214 km/h= mi/hr
knots(kn) meters/second (m/s) 0.514444 kn= m/s
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Temperature

To convert

Into

Multiply by

Examples:

Fahrenheit (°F)-32 Celsius (°C) 5/9 °F= °C
Fahrenheit (°F)+459.67 kelvin (K) 5/9 °F= K
Celsius (°C)+17.7778 Fahrenheit (°F) 1.8 °C= °F
Celsius (°C)+273.15 kelvin (K) 1 °C= K
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Volume

To convert

Into

Multiply by

Examples:

cubic meters (m³) cubic centimeters (cm³) 1,000,000 m³ = cm³
cubic meters (m³) cubic feet (ft³) 35.31467 m³ = ft³
cubic meters (m³) U.S. gallons (gal) 264.1721 m³= gal
liter(l) U.S. gallons (gal) 0.2641721 liter= gal
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For questions and comments, please contact: Dr. L. Charles Sun, Email: Charles.Sun@noaa.gov
  Last modified:    Thu, 30-May-2013 13:58 UTC NODC.Webmaster@noaa.gov
 
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