SI Units of Measurement

Length

• The SI unit of length is the meter (m).
• 1 meter is equal to:
  • 100 centimeters (cm)
  • 1000 millimeters (mm)
  • 0.001 kilometers (km)

Mass

• The SI unit of mass is the kilogram (kg).
• 1 kilogram is equal to:
  • 1000 grams (g)
  • 1,000,000 milligrams (mg)

Time

• The SI unit of time is the second (s).
• 1 second is equal to:
  • 1/60 minute (min)
  • 1/3600 hour (h)

Temperature

• The SI unit of temperature is the Kelvin (K).
• Celsius (°C) is commonly used, where:
  • 0°C = 273.15 K (freezing point of water)
  • 100°C = 373.15 K (boiling point of water)

Electric Current

• The SI unit of electric current is the ampere (A).
• 1 ampere is equal to:
  • 1 coulomb per second (C/s)
  • The flow of 1 coulomb of electric charge per second.

Units of Measurement

Length

• Meter (m) is the SI unit of length.
• 1 meter is equal to 100 centimeters, 1000 millimeters, or 0.001 kilometers.

Mass

• Kilogram (kg) is the SI unit of mass.
• 1 kilogram is equal to 1000 grams or 1,000,000 milligrams.

Time

• Second (s) is the SI unit of time.
• 1 second is equal to 1/60 of a minute or 1/3600 of an hour.

Temperature

• Kelvin (K) is the SI unit of temperature.
• Celsius (°C) is commonly used, with 0°C being 273.15 K (freezing point of water) and 100°C being 373.15 K (boiling point of water).

Electric Current

• Ampere (A) is the SI unit of electric current.
• 1 ampere is equal to 1 coulomb per second (C/s), representing the flow of 1 coulomb of electric charge per second.

SI Units

Length

• Meter (m) is the SI unit of length
• 1 meter is equal to 100 centimeters (cm) or 1000 millimeters (mm)
• Kilometer (km) is a multiple of meter, equal to 1000 m
• Centimeter (cm), Millimeter (mm), Micrometer (μm), and Nanometer (nm) are submultiples of meter, equal to 0.01 m, 0.001 m, 0.000001 m, and 0.000000001 m respectively

Mass

• Kilogram (kg) is the SI unit of mass
• 1 kilogram is equal to 1000 grams (g)
• Ton (t) is a multiple of kilogram, equal to 1000 kg
• Gram (g), Milligram (mg), and Microgram (μg) are submultiples of kilogram, equal to 0.001 kg, 0.000001 kg, and 0.000000001 kg respectively

Time

• Second (s) is the SI unit of time
• 1 second is equal to 1,000 milliseconds (ms) or 1/60 minute
• Minute (min) is a multiple of second, equal to 60 s
• Hour (h) is a multiple of second, equal to 3600 s
• Millisecond (ms) and Microsecond (μs) are submultiples of second, equal to 0.001 s and 0.000001 s respectively

Temperature

• Kelvin (K) is the SI unit of temperature
• 1 Kelvin is equal to 1 degree Celsius (°C) plus 273.15
• Celsius (°C) scale: water freezes at 0°C and boils at 100°C
• Fahrenheit (°F) scale: water freezes at 32°F and boils at 212°F
• Kelvin (K) scale: absolute zero is 0 K (-273.15°C)