These problems will help you practice common unit conversions you'll use in a physics classroom. You'll convert measurements to their standard SI units.

Example Problem: Centimeters to Meters

Problem: A piece of string is 350 centimeters (cm) long. How many meters (m) is that?

Common Conversion Factors

Here are some common conversion factors you might need for these problems:

  • 1 kilogram (kg) = 1000 grams (g)
  • 1 kilometer (km) = 1000 meters (m)
  • 1 meter (m) = 100 centimeters (cm)
  • 1 second (s) = 1000 milliseconds (ms)
  • 1 minute (min) = 60 seconds (s)
  • 1 hour (hr) = 60 minutes (min)

Practice Problems

Solve these problems. Check your answers using the Answer Key at the bottom of the page.

Problem 1: Grams to Kilograms

A physics student measures the mass of an object as 450 grams (g). What is this mass in kilograms (kg)?

Problem 2: Kilometers to Meters

A car travels a distance of 1.5 kilometers (km). How many meters (m) is this distance?

Problem 3: Milliseconds to Seconds

A stopwatch measures a time interval of 1200 milliseconds (ms). Convert this time to seconds (s).

Problem 4: Centimeters to Meters

The height of a table is 85 centimeters (cm). What is this height in meters (m)?

Problem 5: Kilograms to Grams

A small rock has a mass of 0.075 kilograms (kg). What is its mass in grams (g)?

Problem 6: Hours to Seconds

A laboratory experiment runs for 0.5 hours. How many seconds (s) is this duration?

Show Answer Key

Problem 1: 0.45 kg

Problem 2: 1500 m

Problem 3: 1.2 s

Problem 4: 0.85 m

Problem 5: 75 g

Problem 6: 1800 s

Related Concepts & Skills

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