Inches to Micrometers Converter
Enter the length in inches below to convert it to micrometers.
Convert Inches to Micrometers
Enter a value in inches (in) to convert to micrometers (µm).
Inches to Micrometers Conversion Chart (1–40 Continuous)
Continuous 1 to 40 inches lookup table with exact decimals and reduced nearest 1/64 fractions. Highlighted rows mark common shop and ruler values.
| Inches (in) | Decimal (µm) | Fraction — Nearest 1/64 (Reduced) | Nearest 1/16 (Tape) |
|---|---|---|---|
1 in★ Common | 25,400 µm | 25400 µm | 25400 µm |
2 in★ Common | 50,800 µm | 50800 µm | 50800 µm |
3 in★ Common | 76,200 µm | 76200 µm | 76200 µm |
4 in | 101,600 µm | 101600 µm | 101600 µm |
5 in★ Common | 127,000 µm | 127000 µm | 127000 µm |
6 in★ Common | 152,400 µm | 152400 µm | 152400 µm |
7 in | 177,800 µm | 177800 µm | 177800 µm |
8 in★ Common | 203,200 µm | 203200 µm | 203200 µm |
9 in | 228,600 µm | 228600 µm | 228600 µm |
10 in★ Common | 254,000 µm | 254000 µm | 254000 µm |
11 in | 279,400 µm | 279400 µm | 279400 µm |
12 in★ Common | 304,800 µm | 304800 µm | 304800 µm |
How to Convert Inches to Micrometers
To convert inches to micrometers, multiply the length by the following conversion ratio: 25,400 micrometers/inch.
Since one inch is equal to 25,400 micrometers, you can use this simple formula to convert:
The length in micrometers is equal to the length in inches multiplied by 25,400.
For example, here's how to convert 1 inches to micrometers using the formula above.
How Many Micrometers Are in an Inch?
There are 25,400 micrometers in an inch, which is why we use this value in the formula above.
Our inch fraction and decimal calculator can convert inches and micrometers, and it automatically converts the results to US customary, imperial, and SI metric values.
Inches and micrometers are both units used to measure length. Keep reading to learn more about each unit.
How to Convert Inches to Fractional Inches (1/16″, 1/32″ & 1/64″)
Plain-language method for turning decimal inches into a standard tape-measure or machinist ruler fraction
Calculators give you a decimal number (such as 1 in), but tape measures and woodworking rulers are marked in binary fractions of an inch—most commonly 1/16″ on carpenter tapes, 1/32″ on fine woodworking rules, and 1/64″ on machinist scales.
Here is the step-by-step worked example for converting 1 inches (in) into fractional inches:
- Find the decimal inches result: Convert 1 in to inches to get 1 in.
- Separate the whole inches from the decimal part: Keep the whole number 1 aside, leaving the decimal remainder 0.
- Multiply the decimal part by your desired fraction denominator (16, 32, or 64) and round half up: Multiply 0 by 16, 32, or 64, then round to the nearest whole number (values ending in .5 round up).
- Reduce the fraction to lowest terms: If the rounded top number (numerator) is even, divide both top and bottom by 2 (or their Greatest Common Divisor) until the top number is odd, then combine with your whole inches.
What Is an Inch?
An inch is a unit of length equal to 1/12 of a foot or 1/36 of a yard. Because the international yard is legally defined as exactly 0.9144 meters under the 1959 International Yard and Pound Agreement, one inch equals exactly 2.54 centimeters (25.4 millimeters or 25,400,000 nanometers). [1]
The inch is a US customary and imperial unit of length. Inches can be abbreviated as in; for example, 1 inch can be written as 1 in.
Inches can also be denoted using the ″ symbol, otherwise known as a double prime. Often a double quote (") is used instead of a double prime for convenience. A double prime is commonly used to express 1 in as 1″.
The standard ruler is 12 inches long and is a common tool for measuring a length in inches. Another frequently used tool to perform measurements in inches is a tape measure, which commonly comes in lengths from 6' to 35'. Other devices used to measure in inches include scales, calipers, measuring wheels, micrometers, yardsticks, and even lasers.
What Is a Micrometer?
A micrometer is a unit of length equal to 1/1,000,000 of a meter (0.000001 m). One millionth of a meter (10⁻⁶ m), also known as a micron. [2]
The micrometer is classified as a metric and SI-compatible unit of length. Micrometers can be abbreviated as µm; for example, 1 micrometer can be written as 1 µm.
In the metric system, "micro" is the standard SI prefix for millionths, or 10⁻⁶. This makes the micrometer (µm) a convenient decimal multiple of the meter (m).
In practice, micrometers (µm) are widely used across fine-tolerance laboratory, analytical, and micro-scale length measurements within SI metric workflows, engineering documentation, and technical data sheets.
When converting length between inches (in) and micrometers (µm), keep full floating-point precision (1" = 25,400 µm; 1 µm = 0.00003937 in) during intermediate calculations and round only the final micrometer figure to match your instrument tolerance.
More Inch & Micrometer Conversions
Need to calculate in the opposite direction? Use our micrometers to inches converter (µm to in) to switch your starting unit immediately. You can also explore related tools such as converting inches to centimeters, converting inches to millimeters, or converting centimeters to inches.
Convert from Inches
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Length Metrology Standard — Inches (in) to Micrometers (µm)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Inch (in) & Micrometer (Micron) (µm)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (in to µm)