One nanometer is exactly 3.240779289e-26 parsecs, so converting nanometers to parsecs is a single multiplication. Enter any figure and the result appears as you type — the arithmetic runs in your browser, so nothing is sent anywhere.
The distance at which one astronomical unit subtends one arcsecond: about 3.26 light-years. One billionth of a metre — the scale of light wavelengths and chip lithography.
The mil and the millimetre are not the same thing and are out by a factor of about forty. A mil is one thousandth of an inch — 0.0254 mm — and a spec sheet that quotes film thickness in mils means the small unit. British drawings write the same size as "thou". Two tables follow: rounded steps for quick lookup, and a set of real reference quantities converted into parsecs, which is usually more useful than the bare number.
The formula
nanometers- The amount you are converting, in nanometers
3.24077928944e-26- The exact number of parsecs in one nanometer
parsecs- The converted result
How it works, step by step
- Enter the value in nanometers.
- It is multiplied by 3.24077928944e-26, the exact factor between the two units.
- The answer is shown in parsecs, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
A larger figure: 100 nm in parsecs
A larger figure comes to about 100 nm. Multiplying by the factor: 100 × 3.24078e-26 = 3.24078e-24 pc. Dividing the answer back by 3.24078e-26 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
A round figure: 1 nm in parsecs
Take a round figure, roughly 1 nm. The conversion is a single multiplication — 1 × 3.24078e-26 — giving 3.24078e-26 pc. Because the relationship is proportional, doubling the input doubles the answer to 6.48156e-26 pc.
How to read your score
Frequently asked questions
How many parsecs are in one nanometer?
Exactly 3.24077928944e-26. Every figure on this page is that one number multiplied by your input, so the only rounding is at the display step.
What is the formula to convert nanometers to parsecs?
parsecs = nanometers × 3.24077928944e-26. Reversed, nanometers = parsecs ÷ 3.24077928944e-26, which is the same as multiplying by 3.08567758149e+25.
Which is the bigger unit, the nanometer or the parsec?
The parsec. One nanometer is only 3.24078e-26 of a parsec, so it takes 3.08568e+25 nanometers to make one parsec.
What does this quantity actually measure?
Both units measure length. That is why a single factor is enough: there is no temperature offset and no material property involved, unlike conversions that cross between different quantities.
What is a nanometer?
One billionth of a metre — the scale of light wavelengths and chip lithography.
What is a parsec?
The distance at which one astronomical unit subtends one arcsecond: about 3.26 light-years.
Why does my answer differ from another converter?
Almost always because the other tool rounded the factor before multiplying. This page keeps full double precision through the calculation and rounds only for display, and it prints the factor it used so you can see where any difference came from.
Nanometers to parsecs reference tables
| Nanometers | Parsecs |
|---|---|
| 0.5 nm | 1.62039e-26 pc |
| 1 nm | 3.24078e-26 pc |
| 2 nm | 6.48156e-26 pc |
| 3 nm | 9.72234e-26 pc |
| 5 nm | 1.62039e-25 pc |
| 10 nm | 3.24078e-25 pc |
| 20 nm | 6.48156e-25 pc |
| 25 nm | 8.10195e-25 pc |
| 50 nm | 1.62039e-24 pc |
| 75 nm | 2.43058e-24 pc |
| 100 nm | 3.24078e-24 pc |
| 250 nm | 8.10195e-24 pc |
| 500 nm | 1.62039e-23 pc |
| 1000 nm | 3.24078e-23 pc |
| 5000 nm | 1.62039e-22 pc |
Exact factor: 1 nanometer = 3.24077928944e-26 parsecs.
| Quantity | nm | pc |
|---|---|---|
| A credit card’s long edge | 8.56e+07 nm | 2.774e-18 pc |
| A door height | 2.032e+09 nm | 6.585e-17 pc |
| An Olympic pool | 5e+10 nm | 1.620e-15 pc |
| The Eiffel Tower | 3.3e+11 nm | 1.069e-14 pc |
| A marathon | 4.22e+13 nm | 1.367e-12 pc |
| Earth’s diameter | 1.274e+16 nm | 4.129e-10 pc |
Published reference values, converted with the same factor this page uses.