wikiHow Converting Inches to Millimeters Practice Problems 1. John's height is 72 inches. How many millimeters tall is he? 2. A pencil measures 6 inches in length. What is the length of the pencil in millimeters? 3. The width of a book is 8.5 inches. Convert the width to millimeters. 4. Lisa's TV has a screen size of 55 inches. How many millimeters wide is the screen? 5. A sheet of paper measures 11 inches by 8.5 inches. What is the length of the paper in millimeters? 6. The diameter of a circular table is 36 inches. Convert the diameter to millimeters. 7. Alex's computer monitor is 24 inches diagonally. How many millimeters is the diagonal size of the monitor? 8. A rectangular rug measures 5 feet by 8 feet. What is the length of the rug in millimeters? 9. The height of a doorway is 80 inches. Convert the height to millimeters. 10. A TV stand has a width of 48 inches. How many millimeters wide is the stand? 11. The wingspan of an eagle is 72 inches. Convert the wingspan to millimeters. 12. A measuring tape is 12 feet long. What is the length of the tape in millimeters? 13. The diagonal of a square measures 10 inches. How many millimeters is the length of the diagonal? 14. A road sign is 36 inches tall. Convert the height of the sign to millimeters. 15. A wooden plank measures 2 feet by 6 inches. What is the length of the plank in millimeters? 16. The width of a laptop screen is 13.3 inches. How many millimeters wide is the screen? 17. A table measures 30 inches in height. Convert the height of the table to millimeters. 18. The length of a swimming pool is 25 meters. Convert the length to inches and then to millimeters. 19. A sheet of plywood measures 4 feet by 8 feet. What is the length of the plywood in millimeters? 20. The height of a sculpture is 120 inches. Convert the height to millimeters. Page