Convert Inches (in) to Micrometers (μm)
1 inch equals 25400 micrometers.
Inch to Micrometer Converter
How to Convert Inch to Micrometer
1 inch = 25400 micrometers
Micrometer = Inch × 25400
Example: 1 in × 25400 = 25400 μm
Reverse Conversion
To convert micrometers back to inches:
- Remember, 1 micrometer equals 3.93701 × 10-5 inches.
- To convert 25400 μm to in, multiply
25400 x 3.93701 × 10-5, resulting in1 in.
Fractional Inches to Micrometer Chart
Common fractional inch values and their equivalents in μm. Useful for machining, woodworking, drill bits, and precision measurements.
Fractions of an inch (1/64″ to 1″)
| Fraction (in) | Decimal (in) | μm |
|---|---|---|
| 1/64″ | 0.0156 | 396.88 |
| 1/32″ | 0.0313 | 793.75 |
| 3/64″ | 0.0469 | 1,190.63 |
| 1/16″ | 0.0625 | 1,587.50 |
| 5/64″ | 0.0781 | 1,984.38 |
| 3/32″ | 0.0938 | 2,381.25 |
| 7/64″ | 0.1094 | 2,778.13 |
| 1/8″ | 0.1250 | 3,175.00 |
| 9/64″ | 0.1406 | 3,571.88 |
| 5/32″ | 0.1563 | 3,968.75 |
| 11/64″ | 0.1719 | 4,365.63 |
| 3/16″ | 0.1875 | 4,762.50 |
| 13/64″ | 0.2031 | 5,159.38 |
| 7/32″ | 0.2188 | 5,556.25 |
| 15/64″ | 0.2344 | 5,953.13 |
| 1/4″ | 0.2500 | 6,350.00 |
| 17/64″ | 0.2656 | 6,746.88 |
| 9/32″ | 0.2813 | 7,143.75 |
| 19/64″ | 0.2969 | 7,540.63 |
| 5/16″ | 0.3125 | 7,937.50 |
| 21/64″ | 0.3281 | 8,334.38 |
| 11/32″ | 0.3438 | 8,731.25 |
| 23/64″ | 0.3594 | 9,128.13 |
| 3/8″ | 0.3750 | 9,525.00 |
| 25/64″ | 0.3906 | 9,921.88 |
| 13/32″ | 0.4063 | 10,318.75 |
| 27/64″ | 0.4219 | 10,715.63 |
| 7/16″ | 0.4375 | 11,112.50 |
| 29/64″ | 0.4531 | 11,509.38 |
| 15/32″ | 0.4688 | 11,906.25 |
| 31/64″ | 0.4844 | 12,303.13 |
| 1/2″ | 0.5000 | 12,700.00 |
| 33/64″ | 0.5156 | 13,096.88 |
| 17/32″ | 0.5313 | 13,493.75 |
| 35/64″ | 0.5469 | 13,890.63 |
| 9/16″ | 0.5625 | 14,287.50 |
| 37/64″ | 0.5781 | 14,684.38 |
| 19/32″ | 0.5938 | 15,081.25 |
| 39/64″ | 0.6094 | 15,478.13 |
| 5/8″ | 0.6250 | 15,875.00 |
| 41/64″ | 0.6406 | 16,271.88 |
| 21/32″ | 0.6563 | 16,668.75 |
| 43/64″ | 0.6719 | 17,065.63 |
| 11/16″ | 0.6875 | 17,462.50 |
| 45/64″ | 0.7031 | 17,859.38 |
| 23/32″ | 0.7188 | 18,256.25 |
| 47/64″ | 0.7344 | 18,653.13 |
| 3/4″ | 0.7500 | 19,050.00 |
| 49/64″ | 0.7656 | 19,446.88 |
| 25/32″ | 0.7813 | 19,843.75 |
| 51/64″ | 0.7969 | 20,240.63 |
| 13/16″ | 0.8125 | 20,637.50 |
| 53/64″ | 0.8281 | 21,034.38 |
| 27/32″ | 0.8438 | 21,431.25 |
| 55/64″ | 0.8594 | 21,828.13 |
| 7/8″ | 0.8750 | 22,225.00 |
| 57/64″ | 0.8906 | 22,621.88 |
| 29/32″ | 0.9063 | 23,018.75 |
| 59/64″ | 0.9219 | 23,415.63 |
| 15/16″ | 0.9375 | 23,812.50 |
| 61/64″ | 0.9531 | 24,209.38 |
| 31/32″ | 0.9688 | 24,606.25 |
| 63/64″ | 0.9844 | 25,003.13 |
| 1″ | 1.0000 | 25,400.00 |
Whole inches (2″ to 12″)
| Inches | μm |
|---|---|
| 2″ | 50,800.00 |
| 3″ | 76,200.00 |
| 4″ | 101,600.00 |
| 5″ | 127,000.00 |
| 6″ | 152,400.00 |
| 7″ | 177,800.00 |
| 8″ | 203,200.00 |
| 9″ | 228,600.00 |
| 10″ | 254,000.00 |
| 11″ | 279,400.00 |
| 12″ | 304,800.00 |
Bold rows indicate common fractions (1/8, 1/4, 3/8, 1/2, etc.). The conversion factor 1 inch = 25.4 mm is exact by international definition.
Common Inch to Micrometer Conversions
| Inch | Micrometer | Actions |
|---|---|---|
| 0.001 inches | 25.4 micrometers | |
| 0.01 inches | 254 micrometers |
| Inch | Micrometer | Actions |
|---|---|---|
| 0.1 inches | 2540 micrometers | |
| 1 inch | 25400 micrometers |
Inches to micrometers Conversion Table
Reference table with common inches to micrometers conversions. All values calculated with high precision.
Inches to Micrometers Table
1 to 100000
Micrometers to Inches Table
10 to 50000
Micrometers to Inches Table
100000 to 1 × 1010
Definition of Inch
- Definition
- Imperial/US customary unit standardized as exactly 25.4 millimeters since 1959.
- Exact factor
- 1 in = 25.4 mm = 2.54 cm
- Sources
- NIST SP 811
About the Inch
Facts & Uses
- Dominant in US construction, plumbing (pipe diameters), electronics (screen sizes), and hardware (screws, bolts).
- Screen technology: TVs, monitors, phones measured diagonally in inches; DPI (dots per inch) defines display resolution.
- Fractional system in construction: 1/2", 1/4", 1/8", 1/16" for precise fitting; decimal inches in engineering and machining.
- Paper sizes: US letter 8.5 × 11 inches, legal 8.5 × 14 inches; tire dimensions use inches for rim diameter.
Curiosities
- Historical origin: three barleycorns placed end-to-end; width of adult thumb at knuckle.
- Exactly 25.4 mm since 1959 international agreement, ending slight variations between countries.
- Symbol "" (double prime) distinguishes from feet (') in architectural and engineering drawings.
- Smartphone screens paradox: measured diagonally in inches despite metric internal components and manufacturing.
Sources
Frequently Asked Questions
How many micrometers are in one inch?
One inch equals 25400 micrometers. To convert, multiply the inch value by 25400. For the reverse, divide the micrometer value by 25400 (or multiply by 3.93701 × 10-5).
What is 0.004 inches in micrometers?
0.004 inches = 101.6 micrometers. This is one of the most commonly searched conversions for this pair.
How precise is the inch-to-micrometer conversion?
The factor 25400 is accurate to 6 significant figures, derived from international measurement standards. Our calculator uses full precision internally.
Looking for the reverse? Convert Micrometer to Inch
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