From www.forestworld.com

Conversions 

Approximate Conversions
Metric Prefixes For more detail, visit Forest World's ' conversion central ' site. Approximate Conversions

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or
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To Get

LENGTH

millimeter (mm)

 x 0.03937 = inch x 25.4 = mm
(1 inch = 25.4 mm exactly)
centimeter (cm) 10 mm x 0.3937 = inch x 2.54 = cm
meter (m) 1000 mm x 3.28 = foot x 0.305 = m
meter (m) x 1.09 = yard x 0.914 = m
kilometer (km) 1000 m x 0.62 = mile x 1.61 = km

AREA

millimeter2 (mm2)

 x 0.00155 = inch2 x 645 = mm2
centimeter2 (cm2) x 0.155 = inch2 x 6.45 = cm2
meter2 (m2) x 10.8 = foot2 x 0.0929 = m2
meter2 (m2) x 1.2 = yard2 x 0.836 = m2
hectare (ha) 10,000 m2 x 2.47 = acre x 0.405 = ha
kilometer2 (km2) x 0.39 = mile2 x 2.59 = km2

VOLUME

centimeter3 (cm3)

 x 0.061 = inch3 x 16.4 = cm3
liter x 61 = inch3 x 0.016 = L
milliliter (mL) x 0.034 = oz-liq x 29.6 = mL
(1mL = 1 cm3)
liter (L) 1000 mL x 1.06 = quart x 0.946 = L
liter (L) x 0.26 = gallon x 3.79 = L
meter3 (m3) 1000 L x 1.3 = yard3 x 0.76 = m3

MASS

gram (g)

 x 0.035 = ounce x 28.3 = g
kilogram (kg) 1000 g x 2.2 = pound x 0.454 = kg
metric ton (t) 1000 kg x 1.1 = ton(short) x 0.907 = t

FORCE (N=kg·m/s2)

newton (N)

 x 0.225 = pound x 4.45 = N
kilonewton (kN) x 225 = pound x 0.00445 = kN

ENERGY

kilojoule (kJ)

 x 0.948 = Btu x 1.055 = kJ
joule (J) x 0.239 = calorie x 4.19 = J

TEMPERATURE

°C = (°F-32) ÷ 1.8           °F = (°C x 1.8) + 32


Metric Prefixes

Amount          Symbol  Name

1,000,000,000

 G giga jig'a (a as in about)
1,000,000 M mega as in megaphone
1,000 k kilo as in kilowatt
100 h hecto heck'toe
10 da deka deck'a (a as in about)
0.1 d deci as in decimal
0.01 c centi as in sentiment
0.001 m milli as in military
0.000,001 µ micro as in microphone
0.000,000,001 n nano nan'oh (an as in ant)