Nm to Micrometers Converter

Common questions

How many micrometers is 1 nanometer?

0.001 µm, because one thousand nanometres make a micrometre. The pattern holds at every size: 25 nm is 0.025 µm, 70 nm is 0.07 µm, 100 nm is 0.1 µm, 400 nm is 0.4 µm, 700 nm is 0.7 µm and 1,000 nm is exactly 1 µm. Going up from there only moves the point further: 1,000,000 nm is 1,000 µm. The displayed result rounds longer inputs to twelve significant digits.

What is the formula for nm to µm?

Micrometres = nanometres / 1,000, and nanometres = micrometres × 1,000 the other way, so 0.25 µm is 250 nm. Both units come from the metre by SI prefix, nano for 10 to the minus 9 and micro for 10 to the minus 6, which leaves exactly three orders of magnitude between them. Because the factor is a power of ten, the conversion only shifts the decimal point and there is no repeating tail of the kind you get converting to inches, where 1,000 nm is 0.0000393700787402 in.

How do I read an optical wavelength in microns?

Divide a supplied wavelength in nanometres by 1,000. For supplied examples, 380 nm is 0.38 µm, 700 nm is 0.7 µm, 1,064 nm is 1.064 µm and 1,550 nm is 1.55 µm. The converter changes the length unit; it does not identify a light source, classify a spectral band or infer a wavelength from a material or device name.

Is a 7 nm chip 0.007 micrometres wide?

A supplied length of 7 nm is exactly 0.007 µm, and 5 nm is 0.005 µm. A chip process label alone does not establish the measured width of a particular feature. Supply a measured or documented dimension and its unit for conversion; the arithmetic does not measure a chip or interpret a node name.

Where is micrometre in the list under the answer?

Behind the uncommon units switch. Nanometre and micrometre are both filed as uncommon in the length category, so by default the list under the headline shows millimetres, centimetres, metres, kilometres, inches, feet, yards, miles and nautical miles, and the µm figure is the headline itself. Flip the switch in the readout, labelled Show 7 more, and the list adds micrometre, thou, furlong, astronomical unit, light year and parsec. Nanometre never appears there, because it is the unit you are converting from. Both dropdowns list every length unit at all times, uncommon ones included.

Can I convert micrometers back to nanometers here?

Yes. The Swap units button between the two boxes reverses the pair, so this page becomes a micrometres to nanometres converter without a reload: 0.25 µm gives 250 nm and 1.55 µm gives 1,550 nm. Both unit menus remain available, so the same number will go from nanometres to millimetres, metres or inches without leaving the page.

Is a micron the same as a micrometer, and what was a millimicron?

A micron is another name for a micrometre, one millionth of a metre. A millimicron denotes a thousandth of a micron, or one nanometre: a supplied 550 millimicrons is 550 nm and 0.55 µm. The actual menus use Nanometer (nm) and Micrometer (µm). A numeric input suffix must match the selected From unit; µm, um and micrometer are accepted for Micrometer, while micron and the Greek μm spelling are not accepted suffixes here.

What about ångströms, and where does thou fit?

The menu has no ångström. Convert separately using 1 Å = 0.1 nm: 10 Å is 1 nm, and a supplied 3.5 Å is 0.35 nm or 0.00035 µm. Thou is in both menus and in the expanded readout: one thou is exactly 25,400 nm or 25.4 µm, so 1,000 nm displays as 0.0393700787402 thou. A supplied Ra value of 0.4 µm is 400 nm; changing its unit does not verify the surface, measurement method or parameter definition.

Why does a result sometimes read 5e-7 instead of a decimal?

A displayed magnitude below 0.000001 uses exponential notation. For 500 nm the headline is 0.5 µm; the other rows include 0.0005 mm, 0.00005 cm, 5e-7 m, 5e-10 km, 0.0000196850393701 in and 5.46806649169e-7 yd. Type 2.5e3 for 2,500 nm. Copy result copies the displayed headline without digit-grouping commas; each visible conversion row has its own Copy button. Displayed and copied values round to twelve significant digits. If native copying fails, a complete selectable summary identifies the input, selected pair and conventions and includes every unit in the category, including uncommon units.

Why does the page open on nm and µm when I last converted something else?

This focused page opens on Nanometer (nm) to Micrometer (µm), while preserving the main converter’s saved unit pair. When storage is usable, a saved value and uncommon-unit preference can travel between pages. Its suffix must still match From. Valid deliberate scalar edits can save those fields after a short delay; invalid or incomplete drafts preserve the saved record. Unusable or conflicting records remain until you use Forget saved settings, which keeps the current conversion on screen. Your input and converted values are calculated in the browser and are not uploaded by the converter. The definitions arrive with the page, so conversion needs no external data lookup and keeps working offline after the page has loaded. The core conversion needs no account.