Nanojoules to Attojoules Converter
Enter the energy in nanojoules below to convert it to attojoules.
Convert Nanojoules to Attojoules
Enter a value in nanojoules (nJ) to convert to attojoules (aJ).
Nanojoule to Attojoule Conversion Table
Table showing various nanojoule measurements converted to attojoules. Click any preset value or arrow to load it into the converter.
How to Convert Nanojoules to Attojoules
To convert nanojoules to attojoules, multiply the energy by the following conversion ratio: 1,000,000,000 attojoules/nanojoule.
Since one nanojoule is equal to 1,000,000,000 attojoules, you can use this simple formula to convert:
The energy in attojoules is equal to the energy in nanojoules multiplied by 1,000,000,000.
For example, here's how to convert 5 nanojoules to attojoules using the formula above.
How Many Attojoules Are in a Nanojoule?
There are 1,000,000,000 attojoules in a nanojoule, which is why we use this value in the formula above.
Our nanojoule to attojoule calculator automatically converts your energy measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Nanojoules and attojoules are both units used to measure energy. Keep reading to learn more about each unit.
What Is a Nanojoule?
A nanojoule is a unit of energy equal to 1/1,000,000,000 of a joule (1e-9 J). One-billionth of a Joule. [1]
The nanojoule is classified as a metric and SI-compatible unit of energy. Nanojoules can be abbreviated as nJ; for example, 1 nanojoule can be written as 1 nJ.
In the metric system, "nano" is the standard SI prefix for billionths, or 10⁻⁹. This makes the nanojoule (nJ) a convenient decimal multiple of the joule (J).
In practice, nanojoules (nJ) are widely used across fine-tolerance laboratory, analytical, and micro-scale energy measurements within SI metric workflows, engineering documentation, and technical data sheets.
What Is an Attojoule?
An attojoule is a unit of energy equal to 1/999,999,999,999,999,900 of a joule (1e-18 J). 10⁻¹⁸ Joules. [2]
The attojoule is classified as a metric and SI-compatible unit of energy. Attojoules can be abbreviated as aJ; for example, 1 attojoule can be written as 1 aJ.
When working with attojoules (aJ) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, attojoules (aJ) are widely used across fine-tolerance laboratory, analytical, and micro-scale energy measurements within SI metric workflows, engineering documentation, and technical data sheets.
When converting energy between nanojoules (nJ) and attojoules (aJ), keep full floating-point precision (1 nJ = 1,000,000,000 aJ; 1 aJ = 1e-9 nJ) during intermediate calculations and round only the final attojoule figure to match your instrument tolerance.
More Nanojoule & Attojoule Conversions
Need to calculate in the opposite direction? Use our attojoules to nanojoules calculator to switch your starting unit immediately. You can also explore related tools such as converting attojoules to nanojoules, converting joules to calories, or converting calories to joules.
Convert from Nanojoules
Frequently Asked Questions
References
- [1]NIST CODATA StandardNIST CODATA (CODATA Energy & Thermodynamic Constants)·Energy Metrology Standard — Nanojoules (nJ) to Attojoules (aJ)
- [2]NIST SP 811 SpecificationNIST SP 811 (NIST SP 811 App. B.9 (Energy, Work & Heat))·Unit Specifications: Nanojoule (nJ) & Attojoule (aJ)
- [3]BIPM ReferenceBIPM (Derived SI Unit: Joule (J))·Conversion Factors & Mathematical Basis (nJ to aJ)