Kilocalories to Watt-Seconds Converter

Enter the energy in kilocalories below to get the value converted to watt-seconds.

Results in Watt-Seconds:
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1 kcal = 4,184 Ws

Do you want to convert watt-seconds to kilocalories?

How to Convert Kilocalories to Watt-Seconds

To convert a measurement in kilocalories to a measurement in watt-seconds, multiply the energy by the following conversion ratio: 4,184 watt-seconds/kilocalorie.

Since one kilocalorie is equal to 4,184 watt-seconds, you can use this simple formula to convert:

watt-seconds = kilocalories × 4,184

The energy in watt-seconds is equal to the energy in kilocalories multiplied by 4,184.

For example, here's how to convert 5 kilocalories to watt-seconds using the formula above.
watt-seconds = (5 kcal × 4,184) = 20,920 Ws

How Many Watt-Seconds Are in a Kilocalorie?

There are 4,184 watt-seconds in a kilocalorie, which is why we use this value in the formula above.

1 kcal = 4,184 Ws

Kilocalories and watt-seconds are both units used to measure energy. Keep reading to learn more about each unit of measure.

What Is a Kilocalorie?

One kilocalorie, is equal to the heat needed to raise the temperature of one kilogram of water from 14.5 to 15.5 degrees Celsius.

Kilocalories can be abbreviated as kcal; for example, 1 kilocalorie can be written as 1 kcal.

When being used to measure nutrition or metabolic processes, the large calorie is used, which is equal to one kilocalorie.

Learn more about kilocalories.

What Is a Watt-Second?

The watt-second is a measure of electrical energy equal to one watt of power over a one second period. One watt-second is equal to 1/3,600 of a watt-hour or one joule.

Watt-seconds are usually abbreviated as Ws, although the formally adopted expression is W·s. The abbreviation W s is also sometimes used. For example, 1 watt-second can be written as 1 Ws, 1 W·s, or 1 W s.

In formal expressions, the centered dot (·) or space is used to separate units used to indicate multiplication in an expression and to avoid conflicting prefixes being misinterpreted as a unit symbol.[1]

Learn more about watt-seconds.

Kilocalorie to Watt-Second Conversion Table

Table showing various kilocalorie measurements converted to watt-seconds.
Kilocalories Watt-seconds
0.001 kcal 4.184 Ws
0.002 kcal 8.368 Ws
0.003 kcal 12.55 Ws
0.004 kcal 16.74 Ws
0.005 kcal 20.92 Ws
0.006 kcal 25.1 Ws
0.007 kcal 29.29 Ws
0.008 kcal 33.47 Ws
0.009 kcal 37.66 Ws
0.01 kcal 41.84 Ws
0.02 kcal 83.68 Ws
0.03 kcal 125.52 Ws
0.04 kcal 167.36 Ws
0.05 kcal 209.2 Ws
0.06 kcal 251.04 Ws
0.07 kcal 292.88 Ws
0.08 kcal 334.72 Ws
0.09 kcal 376.56 Ws
0.1 kcal 418.4 Ws
0.2 kcal 836.8 Ws
0.3 kcal 1,255 Ws
0.4 kcal 1,674 Ws
0.5 kcal 2,092 Ws
0.6 kcal 2,510 Ws
0.7 kcal 2,929 Ws
0.8 kcal 3,347 Ws
0.9 kcal 3,766 Ws
1 kcal 4,184 Ws


  1. Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition, 2019,

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