wikiHow Converting Feet to Inches Practice Problems Remember, to convert feet to inches, you simply multiply the number of feet by 12. 1. If a wall is 10 feet high, how many inches is that? 2. A room is 15 feet wide. How many inches is that? 3. A football field is 100 yards long. How many feet and inches is that? 4. A tree is 20 feet tall. How many inches is that? 5. A snake is 5 feet long. How many inches is that? 6. A swimming pool is 50 feet long. How many inches is that? 7. A building is 150 feet tall. How many inches is that? 8. A baseball bat is 3 feet long. How many inches is that? 9. A basketball hoop is 10 feet high. How many inches is that? 10. A garden hose is 25 feet long. How many inches is that? 11. A ladder is 12 feet tall. How many inches is that? 12. A table is 8 feet long. How many inches is that? 13. A giraffe is 15 feet tall. How many inches is that? 14. A car is 15 feet long. How many inches is that? 15. A flagpole is 30 feet tall. How many inches is that? 16. A room is 12 feet long. How many inches is that? 17. A curtain rod is 6 feet long. How many inches is that? 18. A wall is 8 feet wide. How many inches is that? 19. A horse is 6 feet tall. How many inches is that? 20. A fence is 50 feet long. How many inches is that? Page