Conversion factor

Definition

A conversion factor is a ratio used to convert one unit of measurement to another. It is derived from the relationship between different units in the same measurement system or between different systems.

5 Must Know Facts For Your Next Test

1. Conversion factors are always equal to 1 and do not change the value, only the units.
2. They can be written as fractions and multiplied with the original quantity for unit conversion.
3. Common examples include converting meters to kilometers or seconds to minutes using appropriate conversion factors.
4. Dimensional analysis often employs conversion factors to ensure consistency in physical equations.
5. Understanding and applying correct significant figures is important when using conversion factors.

Review Questions

• What is a conversion factor and how is it used in unit conversions?
• How would you convert 1500 meters into kilometers using a conversion factor?
• Why is it important to consider significant figures when applying a conversion factor?

Related terms

Dimensional Analysis:

A method of analyzing physical quantities by identifying their base quantities and units, often involving the use of conversion factors.

Significant Figures:

The digits in a measurement that carry meaningful information about its precision, important when performing calculations with measured values.

SI Units: The International System of Units, a standardized system of measurement based on seven base units including meter, kilogram, second, ampere, kelvin, mole, and candela.