Base quantity

Name

Symbol

length

meter

m

mass

kilogram

kg

time

second

s

electric current

ampere

A

thermodynamic temperature

kelvin

K

amount of substance

mole

mol

luminous intensity

candela

cd

12 inch

1 foot

3 feet

1 yard

1760 yards

1 mile

1 inch

2.54 cm (exact; definition of inch.)

1 centimeter (cm)

10 millimeters (mm)

1 meter (m)

100 cm

1 kilometer (km)

1000 m

1 astronomical unit

149,597,871 km (mean distance between Earth and the sun)

1 light year

9.4607 × 10¹² km (distance travelled by light in a year)

1 dozen

12 units

1 score

20 units

1 gross

144 units

1 mole

6.022 × 10²³ units

1 milliliter (ml)

1 cubic centimeter (cc or cm³)

1 liter

1000 ml

1 cubic inch

1.11 tablespoon

1 tablespoon

3 teaspoons

1 teaspoon

4.93 ml

1 fluid ounce (fl oz)

2 tablespoons

1 fl oz

8 drams

1 cup

8 fl oz

1 pint (pt)

2 cups

1 quart (qt)

2 pints

1 gallon (US)

4 quarts

1 liter

1.057 quart

1 cubic inch

16.4 milliliter

1 kg

1000 grams (g)

1 kg

2.204 pounds (lb)

1 lb

454 g

1 lb

16 ounces (oz)

1 oz

28.35 g

1 metric ton

1000 kg

1 ton

2000 lb

1 minute (m)

60 s

1 hour

60 m

1 day

24 h

1 day

86400 s

1 week

7 days

1 year

365.25 days

1 century

100 years