Nanojoules to Kilocalories Converter
Enter the energy in nanojoules below to convert it to kilocalories.
Convert Nanojoules to Kilocalories
Enter a value in nanojoules (nJ) to convert to kilocalories (kcal).
Nanojoule to Kilocalorie Conversion Table
Table showing various nanojoule measurements converted to kilocalories. Click any preset value or arrow to load it into the converter.
| Nanojoules (nJ) | Kilocalories (kcal) |
|---|---|
| 1 nJ | 2.390057e-13 kcal |
| 10 nJ | 2.390057e-12 kcal |
| 100 nJ | 2.390057e-11 kcal |
| 1,000 nJ | 2.390057e-10 kcal |
| 10,000 nJ | 2.390057e-9 kcal |
| 100,000 nJ | 0.000000024 kcal |
| 1,000,000 nJ | 0.000000239 kcal |
| 5,000,000 nJ | 0.000001195 kcal |
| 10,000,000 nJ | 0.00000239 kcal |
| 25,400,000 nJ | 0.000006071 kcal |
How to Convert Nanojoules to Kilocalories
To convert nanojoules to kilocalories, multiply the energy by the following conversion ratio: 2.390057e-13 kilocalories/nanojoule.
Since one nanojoule is equal to 2.390057e-13 kilocalories, you can use this simple formula to convert:
The energy in kilocalories is equal to the energy in nanojoules multiplied by 2.390057e-13.
For example, here's how to convert 5 nanojoules to kilocalories using the formula above.
How Many Kilocalories Are in a Nanojoule?
There are 2.390057e-13 kilocalories in a nanojoule, which is why we use this value in the formula above.
Our nanojoule to kilocalorie calculator automatically converts your energy measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Nanojoules and kilocalories 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 Kilocalorie?
A kilocalorie is a unit of energy equal to 4,184 joules (J), the base unit for energy. Dietary Calorie equal to 1,000 small calories (4,184 Joules). [2]
The kilocalorie is classified as a standard unit of energy. Kilocalories can be abbreviated as kcal; for example, 1 kilocalorie can be written as 1 kcal.
In the metric system, "kilo" is the standard SI prefix for thousands, or 10³. This makes the kilocalorie (kcal) a convenient decimal multiple of the calorie (cal).
In practice, kilocalories (kcal) are widely used across large-scale industrial, bulk, and macro-level energy specifications within international standard workflows, engineering documentation, and technical data sheets.
When converting energy between nanojoules (nJ) and kilocalories (kcal), keep full floating-point precision (1 nJ = 2.390057e-13 kcal; 1 kcal = 4.184e+12 nJ) during intermediate calculations and round only the final kilocalorie figure to match your instrument tolerance.
More Nanojoule & Kilocalorie Conversions
Need to calculate in the opposite direction? Use our kilocalories to nanojoules calculator to switch your starting unit immediately. You can also explore related tools such as converting kilocalories to nanojoules, converting calories to kilocalories, or converting kilojoules to kilocalories.
Convert from Nanojoules
Frequently Asked Questions
References
- [1]NIST CODATA StandardNIST CODATA (CODATA Energy & Thermodynamic Constants)·Energy Metrology Standard — Nanojoules (nJ) to Kilocalories (kcal)
- [2]NIST SP 811 SpecificationNIST SP 811 (NIST SP 811 App. B.9 (Energy, Work & Heat))·Unit Specifications: Nanojoule (nJ) & Kilocalorie (Food Calorie) (kcal)
- [3]BIPM ReferenceBIPM (Derived SI Unit: Joule (J))·Conversion Factors & Mathematical Basis (nJ to kcal)