SAE to Metric Converter

How to Convert Between SAE and Metric Sizes

Converting between SAE (Society of Automotive Engineers) and metric sizes is essential in engineering and manufacturing. This calculator helps you easily convert between inches (SAE) and millimeters (metric).

Conversion Formulas

The basic conversion factor between inches and millimeters is:

• 1 inch = 25.4 mm (exactly)

Using this, we can derive the following formulas:

• To convert inches to millimeters: \[ \text{mm} = \text{inches} \times 25.4 \]
• To convert millimeters to inches: \[ \text{inches} = \frac{\text{mm}}{25.4} \]

Calculation Steps

1. Identify the starting unit (inches or millimeters).
2. Apply the appropriate formula based on the conversion direction.
3. Perform the multiplication or division.
4. Round the result to a reasonable number of decimal places (usually 3 or 4).

Example Calculation

Let's convert 2.5 inches to millimeters:

1. Starting unit: inches
2. Formula: mm = inches × 25.4
3. Calculation: 2.5 × 25.4 = 63.5 mm

Therefore, 2.5 inches is equivalent to 63.5 millimeters.

Visual Representation of SAE to Metric Conversion

The following diagram illustrates the relationship between inches and millimeters:

This diagram shows the relationship between 1 inch and 25.4 mm. The height of each bar represents the relative size, with the taller bar for millimeters illustrating that it's a larger number for the same physical length.