Conversions

Temperature 

Conversion from Celsius into Fahrenheit: °F=(9/5x°C) + 32
Conversion from Fahrenheit into Celsius: °C=5/9 (°F- 32)

Speed

Conversion from Mph into Km/h = Mph x 1.609
Conversion from Km/h into Mph = Km/h / 1.609

 Measurement

1 inch (in) = 2.54 cm
1 foot (ft) = 30.48 cm
1 yard (yd) = 0.9144 m
1 mile = 1.609 km
1 nautical mile = 1.852 km 

Weight

1 ounce (oz) = 28.349 g
1 pound (lb) = 0.453 kg
1 short ton (US ton) = 0.907 t
1 long ton (UK ton) = 1.016 t

 Volume

1 cubic inch (cu.in) = 16.387 cm3
1 cubic foot (cu.ft) = 0.028 m3
1 cubic yard (cu.yd) = 0.765 m3
1 US gallon (gal) = 3.785 l
1 UK gallon (gal) = 4.546 l
1 oil barrel = 158.986 l 

Surface 

1 square inch (sq.in) = 6.452 cm2
1 square foot (sq.ft) = 0.093 m2
1 square yard (sq.yd) = 0.836 m2
1 hectometer (hm) = 100 m
1 hectare (ha) = 1 x 1 hm2 = 100 x 100 m2

1 acre = 0.4047 ha
1 square mile (sq.mi) = 258.998 ha

Conversion Spreadsheet and on-line tool