MM to Inch Converter - Millimeters to Inches Calculator
Convert mm to inches and inches to mm
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Formula for Millimeters to Inches and Inches to Millimeters
How much is 1 inch in mm (inches to mm)
To convert inches to millimeter, multiply inches by 25.4
mm = inches * 25.4
For example, to convert 12 inches to mm, multiply 12 by 25.4
12 inches in mm = 12 * 25.4 = 304.8 mm
How much is 1 mm in inches (mm to inches)
To convert millimeters to inches, divide millimeters by 25.4.
inch = mm / 25.4
For example, 10 millimeters in inches is equal to 10 / 25.4 = 0.3937 inches.
Millimeter to Inches (mm to inches) Conversion table
| Millimeter (mm) | Inches (in) |
|---|---|
| 1 mm | 0.039 inches |
| 2 mm | 0.079 inches |
| 3 mm | 0.118 inches |
| 4 mm | 0.157 inches |
| 5 mm | 0.197 inches |
| 6 mm | 0.236 inches |
| 7 mm | 0.276 inches |
| 8 mm | 0.315 inches |
| 9 mm | 0.354 inches |
| 10 mm | 0.394 inches |
| 12 mm | 0.472 inches |
| 15 mm | 0.591 inches |
| 16 mm | 0.63 inches |
| 17 mm | 0.669 inches |
| 18 mm | 0.709 inches |
| 20 mm | 0.787 inches |
| 22 mm | 0.866 inches |
| 25 mm | 0.984 inches |
| 28 mm | 1.102 inches |
| 29 mm | 1.142 inches |
| 30 mm | 1.181 inches |
| 31 mm | 1.22 inches |
| 32 mm | 1.26 inches |
| 33 mm | 1.299 inches |
| 34 mm | 1.339 inches |
| 35 mm | 1.378 inches |
| 36 mm | 1.417 inches |
| 37 mm | 1.457 inches |
| 38 mm | 1.496 inches |
| 39 mm | 1.535 inches |
| 40 mm | 1.575 inches |
| 41 mm | 1.614 inches |
| 42 mm | 1.654 inches |
| 43 mm | 1.693 inches |
| 44 mm | 1.732 inches |
| 45 mm | 1.772 inches |
| 46 mm | 1.811 inches |
| 47 mm | 1.85 inches |
| 48 mm | 1.89 inches |
| 49 mm | 1.929 inches |
| 50 mm | 1.969 inches |
| 53 mm | 2.087 inches |
| 55 mm | 2.165 inches |
| 57 mm | 2.244 inches |
| 60 mm | 2.362 inches |
| 64 mm | 2.52 inches |
| 65 mm | 2.559 inches |
| 70 mm | 2.756 inches |
| 75 mm | 2.953 inches |
| 80 mm | 3.15 inches |
| 85 mm | 3.346 inches |
| 90 mm | 3.543 inches |
| 100 mm | 3.937 inches |
| 104 mm | 4.094 inches |
| 105 mm | 4.134 inches |
| 110 mm | 4.331 inches |
| 120 mm | 4.724 inches |
| 125 mm | 4.921 inches |
| 128 mm | 5.039 inches |
| 130 mm | 5.118 inches |
| 140 mm | 5.512 inches |
| 150 mm | 5.906 inches |
| 155 mm | 6.102 inches |
| 160 mm | 6.299 inches |
| 175 mm | 6.89 inches |
| 180 mm | 7.087 inches |
| 200 mm | 7.874 inches |
| 220 mm | 8.661 inches |
| 235 mm | 9.252 inches |
| 250 mm | 9.843 inches |
| 280 mm | 11.024 inches |
| 300 mm | 11.811 inches |
| 320 mm | 12.598 inches |
| 330 mm | 12.992 inches |
| 400 mm | 15.748 inches |
| 600 mm | 23.622 inches |
| 650 mm | 25.591 inches |
| 700 mm | 27.559 inches |
| 800 mm | 31.496 inches |
| 900 mm | 35.433 inches |
| 1000 mm | 39.37 inches |
| 1100 mm | 43.307 inches |
| 1200 mm | 47.244 inches |
| 1400 mm | 55.118 inches |
| 1500 mm | 59.055 inches |
| 1600 mm | 62.992 inches |
| 1800 mm | 70.866 inches |
| 2000 mm | 78.74 inches |
| 2400 mm | 94.488 inches |
| 3000 mm | 118.11 inches |
| 5000 mm | 196.85 inches |
Inches to Millimeter (inches to mm) Conversion table
| Inches (in) | Millimeter (mm) |
|---|---|
| 0.125 inches (1/16 in) | 3.175 mm |
| 0.25 inches (1/4 in) | 6.35 mm |
| 0.5 inches (1/2 in) | 12.7 mm |
| 0.75 inches (3/4 in) | 19.05 mm |
| 1 inch | 25.4 mm |
| 1.125 inches (1 1/16 in) | 28.575 mm |
| 1.25 inches (1 1/4 in) | 31.75 mm |
| 1.375 (1 3/8 in) | 34.925 mm |
| 1.5 inches (1 1/2 inch) | 38.1 mm |
| 1.75 inches (1 3/4 inch) | 44.45 mm |
| 2 inches | 50.8 mm |
| 2.5 inches (2 1/2 in) | 63.5 mm |
| 3 inches | 76.2 mm |
| 3.5 inches (3 1/2 in) | 88.9 mm |
| 3.75 inches (3 3/4 in) | 95.25 mm |
| 4 inches | 101.6 mm |
| 4.25 inches (4 1/4 in) | 107.95 mm |
| 4.5 inches (4 1/2 inch) | 114.3 mm |
| 4.75 inches (4 3/4 in) | 120.65 mm |
| 5 inches | 127 mm |
| 5.25 inches (5 1/4 in) | 133.35 mm |
| 5.5 inches (5 1/2 inch) | 139.7 mm |
| 5.75 inches (5 3/4 in) | 146.05 mm |
| 6 inches | 152.4 mm |
| 6.25 inches (6 1/4 in) | 158.75 mm |
| 6.5 inches (6 1/2 inch) | 165.1 mm |
| 6.75 inches (6 3/4 in) | 171.45 mm |
| 7 inches | 177.8 mm |
| 7.5 inches (7 1/2 inch) | 190.5 mm |
| 8 inches | 203.2 mm |
| 8.5 inches (8 1/2 inch) | 215.9 mm |
| 9 inches | 228.6 mm |
| 9.5 inches (9 1/2 inch) | 241.3 mm |
| 10 inches | 254 mm |
| 10.5 inches (10 1/2 inch) | 266.7 mm |
| 11 inches | 279.4 mm |
| 11.5 inches (11 1/2 inch) | 292.1 mm |
| 12 inches | 304.8 mm |
| 12.5 inches (12 1/2 inch) | 317.5 mm |
| 13 inches | 330.2 mm |
| 13.5 inches (13 1/2 inch) | 342.9 mm |
| 14 inches | 355.6 mm |
| 14.5 inches (14 1/2 inch) | 368.3 mm |
| 15 inches | 381 mm |
| 16 inches | 406.4 mm |
| 17 inches | 431.8 mm |
| 18 inches | 457.2 mm |
| 19 inches | 482.6 mm |
| 20 inches | 508 mm |
| 25 inches | 635 mm |
| 30 inches | 762 mm |
| 31 inches | 787.4 mm |
| 32 inches | 812.8 mm |
| 33 inches | 838.2 mm |
| 34 inches | 863.6 mm |
| 35 inches | 889 mm |
| 40 inches | 1016 mm |
| 50 inches | 1270 mm |
| 55 inches | 1397 mm |
| 58 inches | 1473.2 mm |
| 60 inches | 1524 mm |
| 75 inches | 1905 mm |
| 100 inches | 2540 mm |
| 125 inches | 3175 mm |
| 150 inches | 3810 mm |
| 200 inches | 5080 mm |
Convert between millimeters and inches with high precision. Essential for engineering, manufacturing, hardware sizing, and technical specifications. Get instant results for precise measurements in both metric and imperial systems.
How to Use
- Enter the measurement in millimeters or inches
- Select conversion direction (mm to inches or inches to mm)
- View the instant conversion result
- Use the conversion formula: 1 inch = 25.4 millimeters
- Reference the conversion table for common measurements
Features
- Bidirectional conversion (mm ↔ inches)
- High precision calculations (up to 6 decimal places)
- Conversion formula and explanation
- Common conversion table included
- Handles decimal inputs
- Real-time conversion as you type
- Engineering-grade accuracy
- Mobile-friendly interface
Common Use Cases
- Engineering and technical drawings
- Manufacturing and machining specifications
- Hardware and fastener sizing (bolt diameters)
- Tool and drill bit sizes
- Jewelry and watch measurements
- Photography and camera equipment
- Precision crafts and modeling
- Automotive parts and specifications
Tips & Best Practices
1 inch = 25.4 millimeters (exact conversion)
1 millimeter = 0.0393701 inches (exact conversion)
Quick mental math: 1 mm ≈ 0.04 inches, 1 inch ≈ 25 mm
Common sizes: 3mm ≈ 1/8", 6mm ≈ 1/4", 13mm ≈ 1/2"
Engineering uses mm for precision
US tools use fractional inches, metric uses mm
For precision work, use exact 25.4 conversion