Gigajoules to Nanojoules Converter
Enter the energy in gigajoules below to convert it to nanojoules.
Convert Gigajoules to Nanojoules
Enter a value in gigajoules (GJ) to convert to nanojoules (nJ).
Gigajoule to Nanojoule Conversion Table
Table showing various gigajoule measurements converted to nanojoules. Click any preset value or arrow to load it into the converter.
| Gigajoules (GJ) | Nanojoules (nJ) |
|---|---|
| 0.0000001 GJ | 100,000,000,000 nJ |
| 0.0000002 GJ | 200,000,000,000 nJ |
| 0.0000003 GJ | 300,000,000,000 nJ |
| 0.0000004 GJ | 400,000,000,000 nJ |
| 0.0000005 GJ | 500,000,000,000 nJ |
| 0.0000006 GJ | 600,000,000,000 nJ |
| 0.0000007 GJ | 700,000,000,000 nJ |
| 0.0000008 GJ | 800,000,000,000 nJ |
| 0.0000009 GJ | 900,000,000,000 nJ |
| 0.00000001 GJ | 10,000,000,000 nJ |
How to Convert Gigajoules to Nanojoules
To convert gigajoules to nanojoules, multiply the energy by the following conversion ratio: 1e+18 nanojoules/gigajoule.
Since one gigajoule is equal to 1e+18 nanojoules, you can use this simple formula to convert:
The energy in nanojoules is equal to the energy in gigajoules multiplied by 1e+18.
For example, here's how to convert 5 gigajoules to nanojoules using the formula above.
How Many Nanojoules Are in a Gigajoule?
There are 1e+18 nanojoules in a gigajoule, which is why we use this value in the formula above.
Our gigajoule to nanojoule calculator automatically converts your energy measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Gigajoules and nanojoules are both units used to measure energy. Keep reading to learn more about each unit.
What Is a Gigajoule?
A gigajoule is a unit of energy equal to 1,000,000,000 joules (J), the base unit for energy. Equal to 1,000,000,000 Joules, common in natural gas billing. [1]
The gigajoule is classified as an International System of Units (SI) unit of energy. Gigajoules can be abbreviated as GJ; for example, 1 gigajoule can be written as 1 GJ.
In the metric system, "giga" is the standard SI prefix for billions, or 10⁹. This makes the gigajoule (GJ) a convenient decimal multiple of the joule (J).
In practice, gigajoules (GJ) are widely used across large-scale industrial, bulk, and macro-level energy specifications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
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. [2]
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.
When converting energy between gigajoules (GJ) and nanojoules (nJ), keep full floating-point precision (1 GJ = 1e+18 nJ; 1 nJ = 1e-18 GJ) during intermediate calculations and round only the final nanojoule figure to match your instrument tolerance.
More Gigajoule & Nanojoule Conversions
Need to calculate in the opposite direction? Use our nanojoules to gigajoules calculator to switch your starting unit immediately. You can also explore related tools such as converting nanojoules to gigajoules, converting joules to calories, or converting calories to joules.
Convert from Gigajoules
Frequently Asked Questions
References
- [1]NIST CODATA StandardNIST CODATA (CODATA Energy & Thermodynamic Constants)·Energy Metrology Standard — Gigajoules (GJ) to Nanojoules (nJ)
- [2]NIST SP 811 SpecificationNIST SP 811 (NIST SP 811 App. B.9 (Energy, Work & Heat))·Unit Specifications: Gigajoule (GJ) & Nanojoule (nJ)
- [3]BIPM ReferenceBIPM (Derived SI Unit: Joule (J))·Conversion Factors & Mathematical Basis (GJ to nJ)