How do you convert kilocalories to kilowatt-hours?

To convert kilocalories (kcal) to kilowatt-hours (kWh), multiply the energy in kilocalories by 0.00116222 (kilowatt-hours = kilocalories × 0.00116222).

What is 5 kilocalories in kilowatt-hours?

5 kilocalories (5 kcal) is equal to 0.00581111 kilowatt-hours (0.00581111 kWh).

Which is larger, 1 kilocalorie (food calorie) (kcal) or 1 kilowatt-hour (kWh)?

One kilowatt-hour (kWh) is larger than one kilocalorie (food calorie) (kcal). Specifically, 1 kWh equals 860.42065 kcal, while 1 kcal is 0.00116222 kWh.

How do I convert back from kilowatt-hours (kWh) to kilocalories (kcal)?

To reverse the calculation from kWh to kcal, multiply your kilowatt-hour value by the inverse factor 860.42065 (or divide by 0.00116222). You can also click the Swap button in the tool above to flip directions in one click.

How many decimal places should I round kcal to kWh results to?

For everyday comparisons and quick estimates, rounding to 2 decimal places is usually sufficient (for example, 5 kcal ≈ 0.01 kWh). For engineering, laboratory, or machining specifications, select 4 or 6 decimals—or Scientific (10ⁿ) mode—in the calculator toolbar above.

Kilocalories to Kilowatt-hours Converter

Enter the energy in kilocalories below to convert it to kilowatt-hours.

Kilowatt-hours to Kilocalories (kWh → kcal)

Convert Kilocalories to Kilowatt-hours

Enter a value in kilocalories (kcal) to convert to kilowatt-hours (kWh).

Value (kcal)

From

Result

•

0.005811111kilowatt-hours

5 kcal = 0.005811111 kWh

Result updates automatically

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Suggested Conversions

Reference:NIST CODATA (CODATA Energy & Thermodynamic Constants)

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Kilocalorie to Kilowatt-hour Conversion Table

Table showing various kilocalorie measurements converted to kilowatt-hours. Click any preset value or arrow to load it into the converter.

Kilocalories (kcal)	Kilowatt-hours (kWh)
1 kcal	0.0011622 kWh
2 kcal	0.0023244 kWh
2.5 kcal	0.0029056 kWh
5 kcal	0.0058111 kWh
10 kcal	0.0116222 kWh
15 kcal	0.0174333 kWh
20 kcal	0.0232444 kWh
25 kcal	0.0290556 kWh
30 kcal	0.0348667 kWh
50 kcal	0.0581111 kWh

How to Convert Kilocalories to Kilowatt-hours

To convert kilocalories to kilowatt-hours, multiply the energy by the following conversion ratio: 0.0011622 kilowatt-hours/kilocalorie.

Since one kilocalorie is equal to 0.0011622 kilowatt-hours, you can use this simple formula to convert:

kilowatt-hours = kilocalories × 0.0011622

The energy in kilowatt-hours is equal to the energy in kilocalories multiplied by 0.0011622.

For example, here's how to convert 5 kilocalories to kilowatt-hours using the formula above.

kilowatt-hours = (5 kcal × 0.0011622) = 0.0058111 kWh

How Many Kilowatt-hours Are in a Kilocalorie?

There are 0.0011622 kilowatt-hours in a kilocalorie, which is why we use this value in the formula above.

1 kcal = 0.0011622 kWh|1 kWh = 860.4206501 kcal

Our kilocalorie to kilowatt-hour calculator automatically converts your energy measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.

Kilocalories and kilowatt-hours are both units used to measure energy. Keep reading to learn more about each unit.

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). [1]

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.

Learn more about kilocalories in our Energy Converter.

What Is a Kilowatt-hour?

A kilowatt-hour is a unit of energy equal to 3,600,000 joules (J), the base unit for energy. Equal to 3.6 Megajoules (1,000 Wh). [2]

The kilowatt-hour is classified as a metric and SI-compatible unit of energy. Kilowatt-hours can be abbreviated as kWh; for example, 1 kilowatt-hour can be written as 1 kWh.

In the metric system, "kilo" is the standard SI prefix for thousands, or 10³. This makes the kilowatt-hour (kWh) a convenient decimal multiple of the joule (J).

In practice, kilowatt-hours (kWh) are widely used across large-scale industrial, bulk, and macro-level energy specifications within SI metric workflows, engineering documentation, and technical data sheets.

Learn more about kilowatt-hours in our Energy Converter.

When converting energy between kilocalories (kcal) and kilowatt-hours (kWh), keep full floating-point precision (1 kcal = 0.0011622 kWh; 1 kWh = 860.4206501 kcal) during intermediate calculations and round only the final kilowatt-hour figure to match your instrument tolerance.

More Kilocalorie & Kilowatt-hour Conversions

Need to calculate in the opposite direction? Use our kilowatt-hours to kilocalories calculator to switch your starting unit immediately. You can also explore related tools such as converting kilowatt-hours to kilocalories, converting btus to kilowatt-hours, or converting ampere-hours to kilowatt-hours.

Convert from Kilocalories

Convert to Kilowatt-hours

Frequently Asked Questions

There are 0.00116222 kilowatt-hours (kWh) in 1 kilocalorie (kcal). Conversely, 1 kilowatt-hour (kWh) is equal to 860.42065 kilocalories (kcal).

Energy Converter

Quick Info

Direct Factor: 1 kilocalorie (food calorie) (kcal) equals 0.00116222 kilowatt-hours (kWh).
Inverse Factor: 1 kilowatt-hour (kWh) equals 860.42065 kilocalories (kcal).
Formula: kilowatt-hours = kilocalories × 0.00116222.
Verified Precision: Anchored to official NIST SP 811 and ISO/IEC 80000 standards.

Units Comparison

Kilocalorie (Food Calorie) (kcal)

Dietary Calorie equal to 1,000 small calories (4,184 Joules).

Kilowatt-hour (kWh)

Equal to 3.6 Megajoules (1,000 Wh).

Joule (J)

Coherent SI unit of energy and work (1 W·s = 1 N·m).

References

[1]NIST CODATA · CODATA Energy & Thermodynamic Constants
Source
[2]NIST SP 811 · NIST SP 811 App. B.9 (Energy, Work & Heat)
Source
[3]BIPM · Derived SI Unit: Joule (J)
Source

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References

NIST · BIPM · ISO

[1]
NIST CODATA (CODATA Energy & Thermodynamic Constants)·Energy Metrology Standard — Kilocalories (kcal) to Kilowatt-hours (kWh)
NIST CODATA Standard
[2]
NIST SP 811 (NIST SP 811 App. B.9 (Energy, Work & Heat))·Unit Specifications: Kilocalorie (Food Calorie) (kcal) & Kilowatt-hour (kWh)
NIST SP 811 Specification
[3]
BIPM (Derived SI Unit: Joule (J))·Conversion Factors & Mathematical Basis (kcal to kWh)
BIPM Reference

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