m to Nanometers Conversion
One metre holds a billion nanometres, which is why the unit shows up only when you zoom in on light, chips and molecules.
Quick answer: multiply the metres by 1,000,000,000. So 1 m is 1,000,000,000 nm, 0.001 m (1 mm) is 1,000,000 nm and 5 m is 5,000,000,000 nm. To go back, divide by 1,000,000,000.
The meters to nanometers formula
Nanometres equal metres times 10 to the power 9, since nano is the SI prefix for one billionth, or 10 to the power minus 9 (NIST: SI prefixes).
Moving the decimal point nine places to the right does the work.
For 5 m, 5 × 1,000,000,000 is 5,000,000,000 nm (Inch Calculator: Meters to nanometers).
For 0.0000001 m, 0.0000001 × 1,000,000,000 is 100 nm.
The nanometre scale
A nanometre is one billionth of a metre, and nano is the metric prefix for 10 to the power minus 9 (NIST: SI prefixes).
Visible light has wavelengths of roughly 380 to 750 nm, with violet near 380 and red near 750 (Syron Optics: What does nm stand for in light).
Nanometres also describe the features of transistors and the electrical pathways in computer chips (Inch Calculator: Meters to nanometers).
How to convert meters to nanometers step by step
- Write the length in metres.
- Multiply by 1,000,000,000.
- Or move the decimal point nine places right.
- Check the unit label before you copy the answer.
Example 1: 5 m
- Start with 5 m.
- 5 × 1,000,000,000 = 5,000,000,000.
- The length is 5 billion nm.
5 m = 5,000,000,000 nm
Example 2: 0.0000005 m
- Start with 0.0000005 m.
- 0.0000005 × 1,000,000,000 = 500.
- The length is 500 nm, which is green light.
0.0000005 m = 500 nm
Example 3: 2.5 mm
- 2.5 mm is 0.0025 m.
- 0.0025 × 1,000,000,000 = 2,500,000.
- The length is 2.5 million nm.
2.5 mm = 2,500,000 nm
Green light near 500 nm sits in the middle of the visible band.
meters to nanometers conversion table
| Length | In metres | In nanometres |
|---|---|---|
| 1 nm | 0.000000001 m | 1 nm |
| 100 nm | 0.0000001 m | 100 nm |
| 1 µm | 0.000001 m | 1,000 nm |
| 1 mm | 0.001 m | 1,000,000 nm |
| 1 cm | 0.01 m | 10,000,000 nm |
| 0.1 m | 0.1 m | 100,000,000 nm |
| 1 m | 1 m | 1,000,000,000 nm |
| 10 m | 10 m | 10,000,000,000 nm |
| 1 km | 1,000 m | 1,000,000,000,000 nm |
The highlighted row is 1 m, the default of the converter, which equals one billion nanometres.
A quick mental shortcut for meters to nanometers
Count nine zeros. A metre has nine zeros after the 1 when written in nanometres.
From millimetres, add six zeros, and from micrometres, add three zeros.
Nanometres in the visible spectrum
Violet runs from about 380 to 450 nm, blue from 450 to 495, green from 495 to 570, yellow from 570 to 590, orange from 590 to 620 and red from 620 to 750 (Syron Optics: What does nm stand for in light).
The colour of light is set by its wavelength.
Between metres and nanometres
A millimetre is 1,000,000 nm and a micrometre is 1,000 nm, so each step down the metric ladder multiplies by 1,000.
The same pattern holds in every direction on the scale.
Nanometres to metres
Divide by 1,000,000,000 to go back. A 100 nm feature is 0.0000001 m, which is 1 × 10⁻⁷ m.
Scientific notation makes the result easy to read.
Checking your answer
Divide the nanometres by a billion to recover the metres. If 5,000,000,000 gives 5 m, the sum is right.
The nanometre figure should always be a very large number.
More values at a glance
0.5 metres is 500,000,000 nanometres. 2 metres is 2,000,000,000 nanometres. 5 metres is 5,000,000,000 nanometres.
10 metres is 1 × 10¹⁰ nanometres. 25 metres is 2.5 × 10¹⁰ nanometres. 100 metres is 1 × 10¹¹ nanometres.
Each answer is the input times 1,000,000,000. You can use the same factor for any value that is not listed here.
The unit sizes
One of the metres equals 1,000,000,000 nanometres. One of the nanometres equals 1 × 10⁻⁹ metres.
If a result looks very large or very small, compare it with these sizes before you use it.
Checking in reverse
Take 1 × 10¹⁰ nanometres and divide by 1,000,000,000. You get back 10 metres. If you do not, one of the numbers was typed or rounded wrongly.
Scale of the nanometre
A human hair is about 80,000 nanometres wide, which is 0.00008 metres. Visible light has a wavelength of 400 to 700 nanometres, or 4 to 7 × 10⁻⁷ metres.
Quick conversion answers
| Conversion | Result |
|---|---|
| 1 m to nm | 1,000,000,000 nm |
| 0.5 m to nm | 500,000,000 nm |
| 0.001 m to nm | 1,000,000 nm |
| 0.000001 m to nm | 1,000 nm |
| 5 m to nm | 5,000,000,000 nm |
| 0.0000005 m to nm | 500 nm |
Where this conversion is used
Physicists and optics engineers describe wavelengths.
Chip designers and nanotechnologists specify feature sizes.
Students check unit conversions in the metric system.
Common mistakes to avoid
- Moving the decimal the wrong way. Metres to nanometres grows the number.
- Using only six zeros. That converts to micrometres.
- Mixing nm and mm. Check the letters.
- Dropping a zero in a long number. Use scientific notation.
Related converters
Reading very large nanometre numbers
A billion is hard to read at a glance, so scientists write 1,000,000,000 nm as 1 × 10⁹ nm. The exponent tells you how many places the decimal point moved.
Many instruments report lengths straight in nanometres, so a figure such as 550 nm is easier to work with than 0.00000055 m. Convert only when you need to combine it with other lengths in metres.
If you work in micrometres, remember that 1 µm is 1,000 nm, so 0.55 µm and 550 nm are the same length.
Frequently asked questions
How many nanometers are in a meter?
1,000,000,000 nanometers.
How do I convert meters to nanometers?
Multiply the metres by 1,000,000,000.
How many nm is 1 mm?
1,000,000 nm.
How big is a nanometer?
One billionth of a metre.
What is the wavelength of visible light in nm?
Roughly 380 to 750 nm.
How do I convert nanometers to meters?
Divide by 1,000,000,000.
Sources
- Inch Calculator: Meters to nanometers (inchcalculator.com)
- Syron Optics: What does nm stand for in light (syronoptics.com)
- NIST: SI prefixes (nist.gov)
