conversions

metric conversions

basic

  • 1 km = 1000 m

  • 1 m = 100 cm

  • 1 m = 1000 mm

  • 1 cm = 10 mm

  • 1 µm = 0.001 mm

  • 1 nm = 0.001 µm

and then the imperial ones you might need:

  • 1 in = 2.54 cm

  • 1 ft = 12 in

  • 1 yd = 3 ft

  • 1 mi = 5280 ft

length

  • 1 kilometer (km) = 1000 meters (m)

  • 1 meter (m) = 100 centimeters (cm)

  • 1 meter (m) = 1000 millimeters (mm)

  • 1 centimeter (cm) = 10 millimeters (mm)

  • 1 meter (m) = 0.001 kilometers (km)

  • 1 micrometer (µm) = 0.001 millimeters (mm)

  • 1 nanometer (nm) = 0.001 micrometers (µm)

mass/weight

  • 1 kilogram (kg) = 1000 grams (g)

  • 1 gram (g) = 1000 milligrams (mg)

  • 1 milligram (mg) = 1000 micrograms (µg)

volume

  • 1 liter (L) = 1000 milliliters (mL)

  • 1 milliliter (mL) = 1 cubic centimeter (cm³)

area

  • 1 m² = 10,000 cm²

  • 1 km² = 1,000,000 m²

temperature

  • celsius → kelvin: K=°C+273.15K = °C + 273.15K=°C+273.15

  • kelvin → celsius: °C=K−273.15°C = K - 273.15°C=K−273.15

metric prefixes

Prefix

Symbol

Factor

Prefix

Symbol

Power of 10

Mnemonic Word

tera

T

10¹²

The

giga

G

10⁹

Great

mega

M

10⁶

Mighty

kilo

k

10³

King

hecto

h

10²

Henry

deka

da

10¹

Died

base

—

10⁰

By

deci

d

10⁻¹

Drinking

centi

c

10⁻²

Chocolate

milli

m

10⁻³

Milk

micro

m / µ

10⁻⁶

Meeting

nano

n

10⁻⁹

Nine

pico

p

10⁻¹²

Past

femto

f

10⁻¹⁵

Friday

english to english conversions (imperial)

length

  • 1 inch (in) = 2.54 cm

  • 1 foot (ft) = 12 in = 0.3048 m

  • 1 yard (yd) = 3 ft = 36 in = 0.9144 m

  • 1 mile (mi) = 5280 ft = 1760 yd = 1.609 km

weight/mass

  • 1 ounce (oz) = 28.35 g

  • 1 pound (lb) = 16 oz = 0.454 kg

  • 1 ton (US) = 2000 lb = 907.185 kg

volume

  • 1 teaspoon (tsp) = 4.92892 mL

  • 1 tablespoon (tbsp) = 3 tsp = 14.787 mL

  • 1 fluid ounce (fl oz) = 2 tbsp = 29.574 mL

  • 1 cup = 8 fl oz = 236.588 mL

  • 1 pint (pt) = 2 cups = 16 fl oz = 473.176 mL

  • 1 quart (qt) = 2 pt = 4 cups = 32 fl oz = 0.946 L

  • 1 gallon (gal) = 4 qt = 8 pt = 16 cups = 128 fl oz = 3.785 L

area

  • 1 square foot (ft²) = 144 in² = 0.092903 m²

  • 1 square yard (yd²) = 9 ft² = 0.836127 m²

  • 1 acre = 43,560 ft² = 4046.86 m²

temperature

  • fahrenheit → celsius: °C=(°F−32)×59°C = (°F - 32) × \frac{5}{9}°C=(°F−32)×95​

  • celsius → fahrenheit: °F=°C×95+32°F = °C × \frac{9}{5} + 32°F=°C×59​+32

volume conversions

1 m³ = 1,000,000 cm³
1 cm³ = 1 mL