To convert 400 millimeters (mm) to inches, we need to use the conversion factor between these two units. Since 1 inch is equal to 25.4 millimeters, we can calculate the equivalent in inches as follows:
400 mm ÷ 25.4 mm/inch = approximately 15.748 inches
So, 400 mm is equivalent to approximately 15.748 inches.
Here’s a breakdown of this conversion for clarity:
- Conversion factor: 1 inch = 25.4 mm
- Calculation: 400 mm / 25.4 mm/inch = 15.748 inches
- Result: 400 mm is approximately equal to 15.748 inches.
For practical purposes, this can be rounded to 15.75 inches, but the precise conversion is 15.748 inches.
Understanding the Conversion
The conversion from millimeters to inches is straightforward and relies on the fixed relationship between the two units. Millimeters are part of the metric system, while inches are part of the imperial system. Knowing the conversion factor allows for easy switching between these systems, which is useful in a variety of contexts, including construction, manufacturing, and everyday measurements.
Common Conversion Factors
It's helpful to remember common conversion factors for quick calculations. Besides the millimeter to inch conversion, other useful factors include:
- 1 meter = 1000 millimeters = 39.37 inches
- 1 kilometer = 1000 meters = 0.621371 miles
- 1 pound = 0.453592 kilograms
Having these conversion factors at hand can simplify tasks that require switching between different units of measurement.
| Unit | Conversion Factor | Equivalent |
|---|---|---|
| 400 mm | 1 inch = 25.4 mm | approximately 15.748 inches |
Key Points
- The conversion from millimeters to inches uses the factor 1 inch = 25.4 mm.
- 400 mm is equivalent to approximately 15.748 inches.
- Remembering common conversion factors can simplify measurement conversions.
- Tools like conversion calculators can aid in quick conversions.
- Understanding and applying conversion factors is crucial in various fields, including construction and manufacturing.
What is the conversion factor from millimeters to inches?
+The conversion factor is 1 inch = 25.4 mm. To convert millimeters to inches, divide the number of millimeters by 25.4.
How do I convert 400 mm to inches?
+Divide 400 by 25.4 to get approximately 15.748 inches.
Why is it important to know conversion factors?
+Knowing conversion factors is crucial for accurate measurements and calculations, especially in professional fields like construction, engineering, and manufacturing.
