Converting Between Inches and Feet

Core Idea

12 inches equals 1 foot. To convert, multiply feet by 12 to get inches, or divide inches by 12 to get feet. For example, 2 feet = 24 inches.

Explainer

You have already practiced measuring lengths using a ruler — you know that inches are small units and that a foot is a larger unit. The key fact that unlocks this entire topic is a single number: 12 inches = 1 foot. Every conversion between inches and feet flows from this one relationship.

Think of a foot as a group, like an egg carton holds 12 eggs. Just as 2 cartons hold 24 eggs, 2 feet hold 24 inches. To go from feet to inches — from big units to small units — you multiply by 12. You are "unpacking" each foot into its 12 individual inches. So 3 feet = 3 × 12 = 36 inches.

To go the other direction — from inches to feet — you ask: "How many groups of 12 fit into this number?" That is division. If you have 36 inches and want to know how many feet that is, you divide: 36 ÷ 12 = 3 feet. The same relationship, used in reverse. A useful memory trick: going to smaller units means you multiply (both start with the same feeling — things get bigger in count), and going to larger units means you divide.

In everyday life, you might measure something with a ruler and get a number bigger than 12. Converting to feet makes large measurements easier to say and compare. A table that is 36 inches wide is easier to picture as 3 feet wide. Practice by measuring objects around you with a ruler and then writing the same length two ways — once in inches and once in feet and inches.