Customary Length Conversion

Customary Length Conversion

Customary length conversions use units in the same system, so the main job is to move between larger and smaller units correctly and then simplify the result.

1) Know the unit order

A length conversion usually works by comparing nearby units such as inches, feet, yards, and miles. Moving to a smaller unit gives a larger number; moving to a larger unit gives a smaller number.

2) Use the correct conversion factor

Read the relationship between the two units in the problem and multiply or divide accordingly. A helpful way to think about it:

• Smaller unit → larger unit: divide
• Larger unit → smaller unit: multiply

If the conversion involves more than one step, convert one step at a time and keep the units organized.

3) Simplify the final answer

Write the answer in the requested unit only. If the result is a fraction or mixed number, simplify it completely.

4) Check your work

Make sure the answer makes sense:

• converting to a smaller unit should increase the numerical value
• converting to a larger unit should decrease it
• the unit in your final answer should match the question

A quick sanity check helps catch reversed multiplication or division.