# Parsecs to Micrometers (pc to μm)

Source: https://www.unitconvertercalculator.com/length/parsecs-to-micrometers/

**1 pc = 3.0856775814914E+22 μm**

One parsec equals approximately 3.086 x 1022 micrometers. The parsec measures stellar distances; the micrometer measures cells. About 22 orders of magnitude separate the telescope from the microscope.

## Formula

Convert Parsecs to Micrometers

## Conversion Table

| Parsecs (pc) | Micrometers (μm) |
|---|---|
| 1.0E-22 pc | 0 μm |
| 1.0E-21 pc | 0 μm |
| 1.0E-20 pc | 308.56775814914 μm |
| 1.0E-19 pc | 3085.6775814914 μm |
| 1.0E-18 pc | 30856.775814914 μm |
| 1.0E-17 pc | 308567.75814914 μm |
| 1.0E-16 pc | 3085677.5814914 μm |
| 1.0E-15 pc | 30856775.814914 μm |
| 1.0E-14 pc | 308567758.14914 μm |
| 1.0E-13 pc | 3085677581.4914 μm |
| 1.0E-12 pc | 30856775814.914 μm |

## Units

### Parsec (pc)

The distance at which one astronomical unit subtends an angle of one arcsecond. Approximately 3.26 light-years or 30.857 trillion kilometers. The standard unit in professional astronomy.

### Micrometer (μm)

One millionth of a meter, also called a micron. Used in biology for cell sizes, in engineering for surface finishes, and in manufacturing tolerances.

## Background

A parsec is about 30.86 sextillion um. A red blood cell (7 um) is 2.27 x 10-22 parsecs. The parsec and micrometer represent the two ends of scientific measurement: outward to the stars and inward to the cells.

## Good to Know

The micrometer and parsec are the yin and yang of scientific measurement. One looks inward (biology); the other looks outward (astronomy). Between them, 22 orders of magnitude and the entire enterprise of human science. Every scientist works somewhere on this scale.

## FAQ

### How many micrometers are in 1 parsec?

One parsec contains approximately 3.086 x 1022 um.

### How many parsecs is 1 micrometer?

One micrometer equals approximately 3.241 x 10-23 parsecs.

### Is this conversion used?

Never. Biology and stellar astronomy are separated by 22 orders of magnitude.

## Non-Frequently Asked Questions

### How many cells span the Milky Way?

At 20 um per cell, the Milky Way (30,660 pc = 9.46 x 1026 um) spans about 4.73 x 1025 cells. That is more cells than there are in all humans who have ever lived (about 4.3 x 1024). The galaxy is wider in cells than all human biology combined.

### Could a microscope and telescope see the same object?

Not simultaneously. A microscope sees objects at 0.2-100 um. A telescope sees objects at 0.01-13,000 megaparsecs. There is no object that exists at both scales. The gap between microscope and telescope is the gap between parsecs and micrometers: 22 orders of magnitude of nothing in common.

### What lives at the midpoint between a micrometer and a parsec?

The geometric mean of 1 um and 1 parsec is about 1011 um = 100 km. That is the scale of a small country or a large city. Humanity lives, works, and thinks at the midpoint between cellular biology and stellar astronomy. We are the scale between.

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## See Also

- [Micrometers to Parsecs](https://www.unitconvertercalculator.com/length/micrometers-to-parsecs/)