Nanojoules to Calories Converter
Enter the energy in nanojoules below to convert it to calories.
Convert Nanojoules to Calories
Enter a value in nanojoules (nJ) to convert to calories (cal).
Nanojoule to Gram Calorie Conversion Table
Table showing various nanojoule measurements converted to calories. Click any preset value or arrow to load it into the converter.
| Nanojoules (nJ) | Calories (cal) |
|---|---|
| 1 nJ | 2.390057e-10 cal |
| 10 nJ | 2.390057e-9 cal |
| 100 nJ | 0.000000024 cal |
| 1,000 nJ | 0.000000239 cal |
| 10,000 nJ | 0.00000239 cal |
| 100,000 nJ | 0.000023901 cal |
| 1,000,000 nJ | 0.000239006 cal |
| 5,000,000 nJ | 0.001195 cal |
| 10,000,000 nJ | 0.0023901 cal |
| 25,400,000 nJ | 0.0060707 cal |
How to Convert Nanojoules to Calories
To convert nanojoules to calories, multiply the energy by the following conversion ratio: 2.390057e-10 calories/nanojoule.
Since one nanojoule is equal to 2.390057e-10 calories, you can use this simple formula to convert:
The energy in calories is equal to the energy in nanojoules multiplied by 2.390057e-10.
For example, here's how to convert 5 nanojoules to calories using the formula above.
How Many Calories Are in a Nanojoule?
There are 2.390057e-10 calories in a nanojoule, which is why we use this value in the formula above.
Our nanojoule to gram calorie calculator automatically converts your energy measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Nanojoules and calories 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 a Gram Calorie?
A gram calorie is a unit of energy equal to 4.184 joules (J), the base unit for energy. Thermochemical gram calorie defined as 4.184 Joules. [2]
The gram calorie is classified as a standard unit of energy. Calories can be abbreviated as cal; for example, 1 gram calorie can be written as 1 cal.
When working with calories (cal) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, calories (cal) are widely used across standard energy applications within international standard workflows, engineering documentation, and technical data sheets.
When converting energy between nanojoules (nJ) and calories (cal), keep full floating-point precision (1 nJ = 2.390057e-10 cal; 1 cal = 4,184,000,000 nJ) during intermediate calculations and round only the final gram calorie figure to match your instrument tolerance.
More Nanojoule & Gram Calorie Conversions
Need to calculate in the opposite direction? Use our calories to nanojoules calculator to switch your starting unit immediately. You can also explore related tools such as converting calories 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 Calories (cal)
- [2]NIST SP 811 SpecificationNIST SP 811 (NIST SP 811 App. B.9 (Energy, Work & Heat))·Unit Specifications: Nanojoule (nJ) & Gram Calorie (cal) (cal)
- [3]BIPM ReferenceBIPM (Derived SI Unit: Joule (J))·Conversion Factors & Mathematical Basis (nJ to cal)