Kilocalories to Watt-Seconds Conversion (kcal to Ws)

Kilocalories to Watt-Seconds Converter

Enter the energy in kilocalories below to convert it to watt-seconds.

Result in Watt-Seconds:

1 kcal = 4,184 Ws

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

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

References

Bureau International des Poids et Mesures, The International System of Units (SI), 9th edition, 2019, https://www.bipm.org/documents/20126/41483022/SI-Brochure-9-EN.pdf