Live Converter
Take Micrometers Down to the Attometer Scale
Enter any amount above to see it converted between micrometers (µm) and attometers (am), or vice versa.
The Math
How Micrometers and Attometers Relate
Both the micrometer and the attometer are metric units, so this relationship works out to a clean power of ten. One micrometer always equals exactly 1,000,000,000,000 attometers. How to convert: multiply a micrometer value by 1,000,000,000,000 to get attometers. To go the other way, divide an attometer value by that same number to get micrometers. Worked example: 0.000000000001 µm × 1,000,000,000,000 = 1 am.
Where It's Used
Where Attometers Actually Get Used
The attometer describes distances near the limit of what modern instruments can even detect.
Gravitational Wave Detection
LIGO, the observatory that first detected gravitational waves, measures changes in its detector arms as small as a fraction of an attometer, far smaller than a proton. Converting a micrometer scale component tolerance into attometers helps illustrate just how sensitive this kind of instrument actually is.
Subatomic Particle Physics
Some theoretical estimates for the upper size limit of fundamental particles like electrons and quarks fall in the attometer range or smaller. Relating a micrometer scale laboratory measurement back to an attometer scale particle estimate occasionally comes up in high energy physics discussions.
Illustrating the Limits of Measurement
Physics educators sometimes introduce the attometer specifically to show just how far modern precision measurement has pushed past anything visible, even under an electron microscope. Pairing it with a micrometer example helps illustrate that enormous range in a single comparison.
Quick Reference
Micrometer to Attometer Reference Table
Common micrometer values shown alongside their attometer equivalents.
| Length (µm) | Formula | Result (am) |
|---|---|---|
| 1.000000e-12 µm to am | 1.000000e-12 × 1,000,000,000,000 | 1 am |
| 1.000000e-11 µm to am | 1.000000e-11 × 1,000,000,000,000 | 10 am |
| 1.000000e-10 µm to am | 1.000000e-10 × 1,000,000,000,000 | 100 am |
| 1.000000e-09 µm to am | 1.000000e-09 × 1,000,000,000,000 | 1,000 am |
| 1.000000e-08 µm to am | 1.000000e-08 × 1,000,000,000,000 | 10,000 am |
| 1.000000e-07 µm to am | 1.000000e-07 × 1,000,000,000,000 | 100,000 am |
| 0.000001 µm to am | 0.000001 × 1,000,000,000,000 | 1,000,000 am |
| 0.00001 µm to am | 0.00001 × 1,000,000,000,000 | 10,000,000 am |
| 0.0001 µm to am | 0.0001 × 1,000,000,000,000 | 100,000,000 am |
| 0.001 µm to am | 0.001 × 1,000,000,000,000 | 1,000,000,000 am |
| 0.01 µm to am | 0.01 × 1,000,000,000,000 | 10,000,000,000 am |
Got Questions?
Frequently Asked Questions
How many attometers are in a micrometer?
One micrometer equals exactly 1,000,000,000,000 attometers, or 10 to the twelfth power. This comes directly from the metric system's prefix definitions.
How do I convert micrometers to attometers?
Multiply the micrometer value by 1,000,000,000,000 to get attometers. For example, 0.000000000001 micrometers times that figure equals 1 attometer.
How many micrometers are in an attometer?
There are exactly 1 divided by 1,000,000,000,000 micrometers in a single attometer, an extraordinarily small fraction.
What is an attometer used to measure?
It's used to describe distances near the edge of what modern instruments can detect, including gravitational wave measurements at LIGO and theoretical estimates for subatomic particle sizes. Almost nothing at that scale would be practical to express in micrometers.
Why is this conversion a clean power of ten?
Because both the micrometer and the attometer are metric units, and metric units always relate through powers of ten. A conversion involving an imperial unit typically produces a much less tidy multiplier.
Is the attometer commonly used in science?
It shows up in a narrow set of cutting edge fields, most notably gravitational wave astronomy and certain areas of particle physics, where distances genuinely reach that scale. It's far too small for most everyday scientific work.
Does this conversion factor ever change?
No, both units are permanently defined within the metric system, so the relationship between them is fixed forever, unlike a currency exchange rate that shifts throughout the day.
Can this converter handle numbers this extreme accurately?
Yes, the calculator above is built to display very large and very small results using proper notation so the figure stays readable.
How does an attometer compare to a femtometer?
An attometer is one thousand times smaller than a femtometer, since atto represents 10 to the negative eighteenth power and femto represents 10 to the negative fifteenth power. Femtometers describe atomic nuclei, while attometers push into territory near the current limits of measurement.