1 kilometer (km)

= 1,000 (10³) meters
= 0.62 mile

1 meter (m)

= 100 (10²) centimeters
= 1,000 millimeters
= 1.09 yards
= 3.28 feet
= 39.37 inches

1 centimeter (cm)

= 0.01 (10⁻²) meter
= 0.394 inch

1 millimeter (mm)

= 0.001 (10⁻³) meter
= 0.039 inch

1 micrometer (μm)
(formerly micron, μ)

= 10⁻⁶ meter (10⁻³ mm)

1 nanometer (nm)
(formerly millimicron, mμ)

= 10⁻⁹ meter (10⁻³ μm)

1 angstrom (Å)

= 10⁻¹⁰ meter (10⁻⁴ μm)

1 hectare (ha)

= 10,000 square meters
= 2.47 acres

1 square meter (m²)

= 10,000 square centimeters
= 1.196 square yards
= 10.764 square feet

1 square centimeter (cm²)

= 100 square millimeters
= 0.155 square inch

1 metric ton (t)

= 1,000 kilograms
= 1.103 tons

1 kilogram (kg)

= 1,000 grams
= 2.205 pounds

1 gram (g)

= 1,000 milligrams
= 0.0353 ounce
= 15.432 grains

1 milligram (mg)

= 10⁻³ gram
= approx. 0.015 grain

1 microgram (μg)

= 10⁻⁶ gram

1 cubic meter (m³)

= 1,000,000 cubic centimeters
= 1.308 cubic yards
= 35.315 cubic feet

1 cubic centimeter (cm³ or cc)

= 10⁻⁶ cubic meter
= 0.061 cubic inch

1 cubic millimeter (mm³)

= 10⁻⁹ cubic meter
= 10⁻³ cubic centimeter

1 kiloliter (kL or kl)

= 1,000 liters
= 264.17 gallons

1 liter (L or l)

= 1,000 milliliters
= 0.264 gallons
= 1.057 quarts

1 milliliter (mL or ml)

= 10⁻³ liter
= 1 cubic centimeter
= 0.034 fluid ounce
= approx. 1/4 teaspoon
= approx. 15-16 drops (gtt.)

1 microliter (μL or μl)

=10⁻⁶ liter (10⁻³ milliliters)

1 second (s or sec)

= 1/60 minute

1 millisecond (ms or msec)

= 10⁻³ second