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Millimeters to Inches worksheet

Grades 5–6 · CCSS 6.RP.A.3.d

Solve each problem and show your work. Round answers to 2 decimal places where needed.

1.
Problem 1.
- Value to convert: 10
- Direction: Inches → Millimeters
Find: In millimeters
Answer
2.
Problem 2.
- Value to convert: 11
- Direction: Millimeters → Inches
Find: In inches
Answer
3.
Problem 3.
- Value to convert: 8
- Direction: Millimeters → Inches
Find: In inches
Answer
4.
Problem 4.
- Value to convert: 7
- Direction: Millimeters → Inches
Find: In inches
Answer
5.
Problem 5.
- Value to convert: 9
- Direction: Inches → Millimeters
Find: In millimeters
Answer
6.
Problem 6.
- Value to convert: 9
- Direction: Millimeters → Inches
Find: In inches
Answer
7.
Problem 7.
- Value to convert: 12
- Direction: Millimeters → Inches
Find: In inches
Answer
8.
Problem 8.
- Value to convert: 14
- Direction: Inches → Millimeters
Find: In millimeters
Answer
9.
Problem 9.
- Value to convert: 13
- Direction: Millimeters → Inches
Find: In inches
Answer
10.
Problem 10.
- Value to convert: 6
- Direction: Inches → Millimeters
Find: In millimeters
Answer

Answer key: Millimeters to Inches worksheet

1. In millimeters: 254 mm
1. Start with the conversion factor: 1 in is exactly 25.4 mm
  $1 in$ $= 25.4 mm$
2. Multiply your inches by 25.4 to get millimeters
  $10 in \times 25.4$ $= 254 mm$
2. In inches: 0.43 in
1. The official definition goes the other way: 1 in is exactly 25.4 mm
  $1 in$ $= 25.4 mm$
2. So divide your millimeters by 25.4 to get inches
  $\frac{11 mm}{25.4}$ $= 0.433070866142 in$
3. Or multiply by 0.0393700787402 instead. It gives the same answer, because 1 ÷ 25.4 ≈ 0.0393700787402
  $11 mm \times 0.0393700787402$ $= 0.433070866142 in$
3. In inches: 0.31 in
1. The official definition goes the other way: 1 in is exactly 25.4 mm
  $1 in$ $= 25.4 mm$
2. So divide your millimeters by 25.4 to get inches
  $\frac{8 mm}{25.4}$ $= 0.314960629921 in$
3. Or multiply by 0.0393700787402 instead. It gives the same answer, because 1 ÷ 25.4 ≈ 0.0393700787402
  $8 mm \times 0.0393700787402$ $= 0.314960629921 in$
4. In inches: 0.28 in
1. The official definition goes the other way: 1 in is exactly 25.4 mm
  $1 in$ $= 25.4 mm$
2. So divide your millimeters by 25.4 to get inches
  $\frac{7 mm}{25.4}$ $= 0.275590551181 in$
3. Or multiply by 0.0393700787402 instead. It gives the same answer, because 1 ÷ 25.4 ≈ 0.0393700787402
  $7 mm \times 0.0393700787402$ $= 0.275590551181 in$
5. In millimeters: 228.6 mm
1. Start with the conversion factor: 1 in is exactly 25.4 mm
  $1 in$ $= 25.4 mm$
2. Multiply your inches by 25.4 to get millimeters
  $9 in \times 25.4$ $= 228.6 mm$
6. In inches: 0.35 in
1. The official definition goes the other way: 1 in is exactly 25.4 mm
  $1 in$ $= 25.4 mm$
2. So divide your millimeters by 25.4 to get inches
  $\frac{9 mm}{25.4}$ $= 0.354330708661 in$
3. Or multiply by 0.0393700787402 instead. It gives the same answer, because 1 ÷ 25.4 ≈ 0.0393700787402
  $9 mm \times 0.0393700787402$ $= 0.354330708661 in$
7. In inches: 0.47 in
1. The official definition goes the other way: 1 in is exactly 25.4 mm
  $1 in$ $= 25.4 mm$
2. So divide your millimeters by 25.4 to get inches
  $\frac{12 mm}{25.4}$ $= 0.472440944882 in$
3. Or multiply by 0.0393700787402 instead. It gives the same answer, because 1 ÷ 25.4 ≈ 0.0393700787402
  $12 mm \times 0.0393700787402$ $= 0.472440944882 in$
8. In millimeters: 355.6 mm
1. Start with the conversion factor: 1 in is exactly 25.4 mm
  $1 in$ $= 25.4 mm$
2. Multiply your inches by 25.4 to get millimeters
  $14 in \times 25.4$ $= 355.6 mm$
9. In inches: 0.51 in
1. The official definition goes the other way: 1 in is exactly 25.4 mm
  $1 in$ $= 25.4 mm$
2. So divide your millimeters by 25.4 to get inches
  $\frac{13 mm}{25.4}$ $= 0.511811023622 in$
3. Or multiply by 0.0393700787402 instead. It gives the same answer, because 1 ÷ 25.4 ≈ 0.0393700787402
  $13 mm \times 0.0393700787402$ $= 0.511811023622 in$
10. In millimeters: 152.4 mm
1. Start with the conversion factor: 1 in is exactly 25.4 mm
  $1 in$ $= 25.4 mm$
2. Multiply your inches by 25.4 to get millimeters
  $6 in \times 25.4$ $= 152.4 mm$