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# Unit Conversion Calculators

Originally, we thought we would create some online calculators to make this really easy to calculate values and convert data, but then it is way better to teach a person to fish then it is to give them fish.  So we provide a resource to see step-by-step examples and a summary table of conversation factors that are most commonly used in earth and the biological sciences.

### Temperature

How to convert Celsius to Fahrenheit

The temperature, T, in degrees Fahrenheit (°F) is equal to the temperature, T, in degrees Celsius (°C) times 9/5 plus 32:

T(°F) = [T(°C) × 9/5] + 32

or

T(°F) = [T(°C) × 1.8] + 32

Example

Convert 25 degrees Celsius to degrees Fahrenheit:

T(°F) = [25°C × 9/5] + 32 = 77 °F

How to convert Fahrenheit to Celsius

The temperature, T, in degrees Fahrenheit (°F) is equal to the temperature, T, in degrees Celsius (°C) times 9/5 plus 32:

If, T(°F) = [ T(°C) × 9/5 ] + 32

Then, T(°C) = 5/9 [ (T(°F) – 32 ]

Example

Convert 77 degrees Fahrenheit to degrees Celsius:

T(°C) = 5/9 [ (T(°F) – 32] = 5/9 [ (77) – 32) ] = 5/9 ( 45 ) = 25 °C

### Volume

Convert Gallons to Liters

1 gallon  = 3.785 liters

1 liter = 0.2642 gallons

Convert cubic centimeters (cc or cm3) to milliliters (ml) et al

1 cc = 1 ml

1 liter = 1000 cc = 1000 ml

1 cubic meter (m3) = 1000 liters = 1,000,000 ml

Cubic feet to gallons

1 cubic foot = 7.480543 gallons

1 gallon = 0.1336801 cubic feet

Acre-inches to gallons

1 acre = 43560.04 square feet

1 inch = 0.0833 feet

1 acre-in = 27154.286 gallons

### Length / Distance

1 foot = 12 inches

3 feet = 1 yard

1 inch = 2.54 centimeters

1 foot = 30.48 centimeters = 304.8 millimeters = 0.3048 meters

1 yard = 0.9144 meters

### Summary of Conversion Factors Between International (Metric) System of Units (SI) and Non-SI (not-metric) Units

 Convert Unit 1 to Unit 2 Convert Unit 2 to Unit 1 Multiple by Multiple by Mass Units Unit 1 Unit 2 0.0022 Gram, g Pound, lb. 454 0.0011 Kilogram, kg Ton (US), ton 907 2.205 Kilogram, kg Pound, lb. 0.454 1.102 tonne, Ton (US), ton 0.907 Length Units Unit 1 Unit 2 0.394 Centimeter, cm Inch, in 2.54 0.00394 Millimeter, mm Inch, in 25.4 3.28 Meter, m Foot, ft 0.305 0.621 Kilometer, km Mile, mi 1.609 Volume Units Unit 1 Unit 2 0.00972 Cubic meter, m3 Acre-inch, ac-in 102.8 0.00081 Cubic meter, m3 Acre-foot, ac-ft 1234 0.81 Cubic, kilometer, km3 Million ac-feet, maf 1.234 0.265 Liter, l Gallon, gal 3.785 Area Units Unit 1 Unit 2 2.47 Hectare, ha Acre, acre 0.405 247 Square km, km2 Acre, acre 0.00405 0.000247 Square m, m2 Acre, acre 4047 10.76 Square m, m2 Square foot, ft2 0.0929 0.386 Square km, km2 Square Mile, mi2 2.589 Electrical Conductivity Unit 1 Unit 2 10 Siemen/m, S/m millimho/cm, mmho/cm 0.1 1 decisiemen/m, dS/m millimho/cm, mmho/cm 1 0.001 decisiemen/m, dS/m micromho/cm, µmho/cm 1000 1 millisiemen/cm, mS/cm micromho/cm, µmho/cm 1 Concentration Unit 1 Unit 2 0.1 g/kg Percent 10 1 mg/kg ppm 1 0.1335 g/L ounce/gallon 7.489 0.00835 g/L lb/gallon 119.8 1 centimole/kg meq/100 g 1

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