Gigajoules to Microjoules Converter
Enter the energy in gigajoules below to convert it to microjoules.
Convert Gigajoules to Microjoules
Enter a value in gigajoules (GJ) to convert to microjoules (µJ).
Gigajoule to Microjoule Conversion Table
Table showing various gigajoule measurements converted to microjoules. Click any preset value or arrow to load it into the converter.
| Gigajoules (GJ) | Microjoules (µJ) |
|---|---|
| 0.0000001 GJ | 100,000,000 µJ |
| 0.0000002 GJ | 200,000,000 µJ |
| 0.0000003 GJ | 300,000,000 µJ |
| 0.0000004 GJ | 400,000,000 µJ |
| 0.0000005 GJ | 500,000,000 µJ |
| 0.0000006 GJ | 600,000,000 µJ |
| 0.0000007 GJ | 700,000,000 µJ |
| 0.0000008 GJ | 800,000,000 µJ |
| 0.0000009 GJ | 900,000,000 µJ |
| 0.00000001 GJ | 10,000,000 µJ |
How to Convert Gigajoules to Microjoules
To convert gigajoules to microjoules, multiply the energy by the following conversion ratio: 1e+15 microjoules/gigajoule.
Since one gigajoule is equal to 1e+15 microjoules, you can use this simple formula to convert:
The energy in microjoules is equal to the energy in gigajoules multiplied by 1e+15.
For example, here's how to convert 5 gigajoules to microjoules using the formula above.
How Many Microjoules Are in a Gigajoule?
There are 1e+15 microjoules in a gigajoule, which is why we use this value in the formula above.
Our gigajoule to microjoule calculator automatically converts your energy measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Gigajoules and microjoules 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 Microjoule?
A microjoule is a unit of energy equal to 1/1,000,000 of a joule (0.000001 J). One-millionth of a Joule. [2]
The microjoule is classified as a metric and SI-compatible unit of energy. Microjoules can be abbreviated as µJ; for example, 1 microjoule can be written as 1 µJ.
In the metric system, "micro" is the standard SI prefix for millionths, or 10⁻⁶. This makes the microjoule (µJ) a convenient decimal multiple of the joule (J).
In practice, microjoules (µJ) 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 microjoules (µJ), keep full floating-point precision (1 GJ = 1e+15 µJ; 1 µJ = 1e-15 GJ) during intermediate calculations and round only the final microjoule figure to match your instrument tolerance.
More Gigajoule & Microjoule Conversions
Need to calculate in the opposite direction? Use our microjoules to gigajoules calculator to switch your starting unit immediately. You can also explore related tools such as converting microjoules 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 Microjoules (µJ)
- [2]NIST SP 811 SpecificationNIST SP 811 (NIST SP 811 App. B.9 (Energy, Work & Heat))·Unit Specifications: Gigajoule (GJ) & Microjoule (µJ)
- [3]BIPM ReferenceBIPM (Derived SI Unit: Joule (J))·Conversion Factors & Mathematical Basis (GJ to µJ)