This page may be
updated as we encounter new units.
Common unit conversions (such as 1 yard = 3 feet, or 1 day = 24 hours)
will not appear here.
Distance |
1 m = 3.281 ft |
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1 mi = 1609 m |
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1 mi = 5280 ft |
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1 m = 100 cm |
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1 m = 1000 mm |
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1 km = 1000 m |
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Force |
1 lb = 4.448 N 1 lb = 7000 grains |
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Power |
1 Hp = 550 ft-lb/s |
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1 Hp = 746 W |
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1 W = 1 J/s |
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Speed |
1 m/s = 2.237 mph |
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Weight and mass |
1 kg weighs 9.8 N 1 kg weighs 2.203 lb 1 kg = 1000 g |
(a kilogram is the mass of
1 liter of water) |
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1 u = 1.6605 x 10-27 kg |
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1 gram = 15.432358 grains |
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Volume |
1000 ml = 1 l |
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1 ml = 1 cm3 |
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1 ft3 = 7.481 gal |
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1 gal = 3.786 l |
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1 l = 10 cm x 10 cm x 10 cm |
(a
liter is the volume of a cube that has sides of length 0.10 meters) |
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Energy |
1 J = 1 Nm = 0.738 ft.lb |
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1 cal = 4.186 J |
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1 |
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1 BTU = 252 cal |
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Pressure |
1 Pa = 1 N/m2 = 1.45 x 10-4 psi |
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1 kPa = 1000 Pa |
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1 atm = 14.7 psi = 101.3 kPa |
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760 mm Hg = 1 atm |
Blood pressure is measured in units of mm Hg
(millimeters of Mercury – the pressure required to raise Mercury so many mm
in a tube). So if a person’s systolic
pressure is “140” that is 140 mm Hg). |
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Temperature |
100 K = 180 R |
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Celsius = K – 273 |
Celsius & Fahrenheit are not true temperature
units. |
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Fahrenheit = R - 460 |
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Activity of Radioactive
material |
1 Bq = 1 decay/sec |
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Time |
1 year = 3.156 x 107 sec 1 year = 31,560,000 sec |
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Charge |
1 C = 6.24151 x 1018 e |
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Angle |
1 Revolution = 360o |
2p “radians” is just 2p because radians are a dimensionless ratio, not a regular unit. |
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1 Revolution = 2p |
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1 Revolution = 400 Grad |
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