Nanometer is 1e-9 meter units.
Nanometers to Terameters Converter — nm to Tm
Convert Nanometer (nm) to Terameter (Tm) using the exact conversion factor (1 nanometer = 1e-21 terameter). See the formula, worked examples, and conversion table.
Nanometers to Terameters converter
Converter
Length Converter
Convert SI, imperial, US customary, astronomical, scientific, and historical length units.
Context values
Some unit families need one extra value for a physically accurate result.
Terameter is 1000000000000 meter units.
Result = input x 1e-9 / 1e+12.
Length uses the meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Nanometers to Terameters
Nanometer and Terameter both measure length. Specifically: Nanometer is 1e-9 meter units, and terameter is 1000000000000 meter units.
Formula
terameters = nanometers × 1e-21
This factor comes from each unit's defined relationship to the category's base unit: 1 nanometer equals 1e-9 base units, and 1 terameter equals 1e+12 base units, so dividing one by the other gives the direct nanometer-to-terameter factor of 1e-21.
Simple example
1 nm × 1e-21 = 1e-21 Tm
1 nanometer = 1e-21 terameters.
Real-world example
10 nm × 1e-21 = 1e-20 Tm
10 nanometers = 1e-20 terameters.
Conversion table
| Nanometer (nm) | Terameter (Tm) |
|---|---|
| 1 nm | 1e-21 Tm |
| 5 nm | 5e-21 Tm |
| 10 nm | 1e-20 Tm |
| 21.0975 nm | 2.10975e-20 Tm |
| 42.195 nm | 4.2195e-20 Tm |
| 100 nm | 1e-19 Tm |
Reverse conversion: Terameter to Nanometer
1e-21 Tm × 1e+21 = 1 nm
1e-21 terameters = 1 nanometers.
nanometers = terameters × 1e+21
For a page dedicated to this direction, see Terameter to Nanometer.
Understanding the Nanometer (nm)
Nanometer is 1e-9 meter units.
Understanding the Terameter (Tm)
Terameter is 1000000000000 meter units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many terameters are in 1 nanometer?
1 nanometer equals 1e-21 terameters, using the exact defined conversion factor rather than an estimate.
How do I convert nanometer to terameter?
Multiply the nanometer value by 1e-21. The converter above does this instantly to whatever precision you set.
How do I convert terameter back to nanometer?
Use the reverse factor: 1 terameter equals 1e+21 nanometers. You can also use the swap control in the converter above to flip the direction instantly.
What is a nanometer?
Nanometer (nm) is a unit of length.
What is a terameter?
Terameter (Tm) is a unit of length.
Is the nanometer to terameter conversion exact?
Yes. Both nanometer and terameter are defined by fixed standards rather than physical artifacts, so the factor of 1e-21 used above is exact to as many digits as you choose to display.