1. Inch to mm Conversion

The inch to millimeter conversion is essential in many fields, especially when working with measurements from different systems. The conversion factor is standardized internationally.

2. How the Conversion Works

The conversion uses a simple multiplication:

Where:

• 1 inch = exactly 25.4 millimeters
• This conversion factor was established internationally in 1959

3. Common Uses

Details: This conversion is commonly used in engineering, manufacturing, construction, and any field that requires precise measurements between imperial and metric systems.

4. Using the Calculator

Tips: Enter the measurement in inches (e.g., 0.25 for 1/4 inch). The calculator will automatically convert it to millimeters. The default value shows the conversion for 1/4 inch (6.35 mm).

5. Frequently Asked Questions (FAQ)

Q1: Why is 1/4 inch equal to 6.35 mm?
A: Because 0.25 × 25.4 = 6.35 mm. This is the exact conversion.

Q2: How precise is this conversion?
A: The conversion factor 25.4 is exact, so the calculation is mathematically precise.

Q3: When would I need this conversion?
A: When working with international standards, mechanical parts, or any situation requiring metric measurements of inch-based dimensions.

Q4: Are there other common inch fractions and their mm equivalents?
A: Yes, for example: 1/8" = 3.175 mm, 1/2" = 12.7 mm, 3/4" = 19.05 mm.

Q5: Can I convert mm back to inches?
A: Yes, by dividing mm by 25.4 (or multiply by 0.0393701).