0.118 inches is equal to 2.9972 millimeters.
To convert inches to millimeters, multiply the inch value by 25.4, since one inch equals exactly 25.4 millimeters. So, 0.118 inches times 25.4 gives the result in millimeters.
Conversion Tool
Result in mm:
Conversion Formula
The formula to convert inches (in) to millimeters (mm) uses the exact length of an inch in millimeters: 25.4 mm per inch. So, the formula is:
millimeters = inches × 25.4
This works because the inch is defined internationally as exactly 25.4 millimeters. When you multiply the inch measurement by 25.4, you get the equivalent length in millimeters.
For example, to convert 0.118 in to mm:
- Start with 0.118 inches
- Multiply by 25.4: 0.118 × 25.4 = 2.9972
- The result is 2.9972 mm
Conversion Example
- Convert 3 in to mm:
- 3 × 25.4 = 76.2 mm
- Thus, 3 inches equals 76.2 millimeters
- Convert 0.5 in to mm:
- 0.5 × 25.4 = 12.7 mm
- Half an inch is 12.7 millimeters
- Convert 7.25 in to mm:
- 7.25 × 25.4 = 184.15 mm
- 7.25 inches converts to 184.15 mm
- Convert 0.01 in to mm:
- 0.01 × 25.4 = 0.254 mm
- This shows a tiny length of 0.254 mm
Conversion Chart
| Inches (in) | Millimeters (mm) |
|---|---|
| -24.9 | -632.46 |
| -20.0 | -508.00 |
| -15.5 | -393.70 |
| -10.2 | -259.08 |
| -5.0 | -127.00 |
| 0.0 | 0.00 |
| 3.33 | 84.58 |
| 7.7 | 195.58 |
| 12.0 | 304.80 |
| 16.5 | 419.10 |
| 20.1 | 510.54 |
| 25.1 | 637.54 |
This chart shows several inch values from negative to positive, with their millimeter equivalents. You can locate the inch value you need, then see the converted millimeter value directly beside it for a quick reference.
Related Conversion Questions
- How many millimeters are in 0.118 inches exactly?
- What is the formula to convert 0.118 in to mm?
- Can I convert 0.118 inches to millimeters without a calculator?
- Why does 0.118 inches equal 2.9972 mm?
- Is 0.118 inches more or less than 3 millimeters?
- How do I convert fractional inches like 0.118 in into millimeters?
- What is the quickest way to convert 0.118 in to mm for engineering work?
Conversion Definitions
In (inch): An inch is a unit of length in the imperial system, equal to exactly 25.4 millimeters. It is widely used in the United States and some other countries for measuring length or distance, especially in construction, manufacturing, and everyday measurements.
Mm (millimeter): A millimeter is a metric unit of length equal to one thousandth of a meter (0.001 m). It is used worldwide for precise measurements in engineering, manufacturing, and science, representing small distances or thicknesses with high accuracy.
Conversion FAQs
Why is one inch defined as exactly 25.4 millimeters?
In 1959, international agreement standardized the inch as exactly 25.4 mm to unify measurements between countries using imperial and metric systems. This fixed definition removes any ambiguity, making conversions precise and consistent for trade, engineering, and scientific purposes worldwide.
Can I convert inches to millimeters in my head for rough estimates?
You can approximate by multiplying inches by 25, then adding a bit more because 25.4 is slightly higher. For example, 1 inch ~ 25 mm, so 0.1 inch ~ 2.5 mm. This gives quick estimates but not precise values needed for exact work.
Are there any common mistakes when converting 0.118 in to mm?
One common mistake is forgetting to multiply by 25.4 or using 2.54 (which converts inches to centimeters), leading to wrong results. Also, rounding too early can cause slight errors, so always keep decimals until final rounding.
Is the conversion formula different if I need to convert mm to inches?
Yes, converting millimeters back to inches uses the inverse formula: inches = millimeters ÷ 25.4. This reverses the multiplication step and gives accurate inch values from millimeters.
Does temperature or material affect inch to millimeter conversions?
The mathematical conversion remains the same regardless of temperature or material. But physical objects might expand or contract with heat, changing actual lengths slightly, though the conversion factor stays constant.