APPENDIX 1 Unit Conversions

APPENDIX 1 Unit Conversions

Table : Unit Conversions—Metric to U.S. Customary

METRIC

MULTIPLIER

U.S. CUSTOMARY

Length

 

 

Millimeters (mm)

0.0394

Inches (in)

Meters (m)

3.28    

Feet (ft)

Centimeters (cm)

0.394  

Inches (in)

Kilometers (km)

0.621  

Miles (mi)

Nautical mile

1.15    

Statute mile

Area

 

 

Square centimeters (cm2)

0.155  

Square inches (in2)

Square meters (m2)

10.8         

Square feet (ft2)

Square meters (m2)

1.12    

Square yards (yd2)

Square kilometers (km2)

0.386  

Square miles (mi2)

Hectares

2.47    

Acres

Volume

 

 

Cubic centimeters (cm3)

0.061  

Cubic inches (in3)

Cubic meters (m3)

35.3         

Cubic feet (ft3)

Cubic meters (m3)

1.31    

Cubic yards (yd3)

Milliliters (ml)

0.0338

Fluid ounces (fl oz)

Liters (L)

1.06    

Quarts (qt)

Liters (L)

0.264  

Gallons (gal)

Cubic meters (m3)

0.0008

Acre-feet (acre-ft)

Mass

0.0394

Inches (in)

Grams (g)

0.0353

Ounces (oz)

Kilograms (kg)

2.2      

Pounds (lb)

Kilograms (kg)

0.0011

Tons (2,000 lb)

Metric ton (tonne) (t)

1.1      

Short ton (tn)

Velocity

 

 

Meters per second (m/s)

3.28    

Feet per second (ft/s)

Kilometers per hour (km/h)

0.62    

Miles per hour (mph)

Knots (kt) (nautical mph)

1.15    

Miles per hour (mph)

Temperature

 

 

Degrees Celsius (°C)

1.8 then add 32

Degrees Fahrenheit (°F)

Celsius degree (°C)

1.8      

Fahrenheit degree (°F)

Table : Unit Conversions—U.S. Customary to Metric

U.S. CUSTOMARY

MULTIPLIER

METRIC

Length

 

 

Inches (in)

25.4       

Millimeters (mm)

Inches (in)

2.54    

Centimeters (cm)

Feet (ft)

0.305  

Meters (m)

Miles (mi)

1.61    

Kilometers (km)

Statute mile

0.8684

Nautical mile

Area

 

 

Square inches (in2)

6.45    

Square centimeters (cm2)

Square feet (ft2)

0.0929

Square meters (m2)

Square yards (yd2)

0.836  

Square meters (m2)

Square miles (mi2)

2.59    

Square kilometers (km2)

Acres

0.405  

Hectares

Volume

 

 

Cubic inches (in3)

16.4         

Cubic centimeters (cm3)

Cubic feet (ft3)

0.0283

Cubic meters (m3)

Cubic yards (yd3)

0.765  

Cubic meters (m3)

Fluid ounces (fl oz)

29.6         

Milliliters (ml)

Quarts (qt)

0.946  

Liters (L)

Gallons (gal)

3.79    

Liters (L)

Acre-feet (acre-ft)

1,233.5              

Cubic meters (m3)

Mass

 

 

Ounces (oz)

28.4          

Grams (g)

Pounds (lb)

0.454  

Kilograms (kg)

Tons (2,000 lb)

907.0           

Kilograms (kg)

Short ton (tn)

0.907  

Metric ton (tonne) (t)

Velocity

 

 

Feet per second (ft/s)

0.3049

Meters per second (m/s)

Miles per hour (mph)

1.6      

Kilometers per hour (km/h)

Miles per hour (mph)

0.8684

Knots (kt) (nautical mph)

Temperature

 

 

Degrees Fahrenheit (°F)

0.556 after subtracting 32

Degrees Celsius (°C)

Fahrenheit degree (°F)

0.556  

Celsius degree (°C)

A-2