Watt to Calorie/Hour Converter

Power Converter

22 units available

Decimals:

From

To

860.42065

1 W = 860.42065 cal/h

Formula:

cal/h = W × 860.4206502601

With your value: 1 W = 860.42065026 cal/h

How big is that?

Everyday references on a logarithmic scale, all expressed in watt so you can sanity-check the result.

Your value1.00 W

LED bulb (9.0× your value)9.00 W

Laptop (65× your value)65.0 W

Microwave oven (1.0e+3× your value)1.00e+3 W

Electric kettle (3.0e+3× your value)3.00e+3 W

Family car engine (9.0e+4× your value)9.00e+4 W

Other Watt to Calorie/Hour conversions

2 W to cal/h 3 W to cal/h 4 W to cal/h 5 W to cal/h 6 W to cal/h 7 W to cal/h 8 W to cal/h

Watt to Calorie/Hour Conversion Table

Watt (W)	Calorie/Hour (cal/h)
0.5	430.210325
1	860.42065
2	1,720.841301
5	4,302.103251
10	8,604.206503
15	12,906.309754
20	17,208.413005
25	21,510.516257
50	43,021.032513
100	86,042.065026
250	215,105.162565
500	430,210.32513
1000	860,420.65026

Calorie/Hour to Watt Conversion Table

Calorie/Hour (cal/h)	Watt (W)
0.5	0.000581
1	0.001162
2	0.002324
5	0.005811
10	0.011622
15	0.017433
20	0.023244
25	0.029056
50	0.058111
100	0.116222
250	0.290556
500	0.581111
1000	1.162222

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Watt (W)

Power

Exact conversion

Derived from the watt (1 W = 1 J/s).

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Calorie/Hour (cal/h)

Power

Exact conversion

Derived from the watt (1 W = 1 J/s).

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Watt to Calorie/Hour

To convert from Watt (W) to Calorie/Hour (cal/h), multiply the value by 860.4206502601.

Formula: cal/h = W × 860.4206502601

Reverse: W = cal/h × 0.0011622222

Step-by-Step Example

Start with your value in Watt. For example: 5 W
Multiply by the conversion factor: 5 x 860.4206502601
The result is: 4,302.103251 cal/h

About Watt

The watt (W) is a unit of power. One watt equals 1 watt. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: power calculations, engineering and science, education.

About Calorie/Hour

The calorie/hour (cal/h) is a unit of power. One calorie/hour equals 0.001162222222 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: power calculations, engineering and science, education.

Frequently Asked Questions

How many Calorie/Hour are in 1 Watt?

There are exactly 860.4206502601 Calorie/Hour in 1 Watt. This means the conversion factor from Watt to Calorie/Hour is 860.4206502601.

What is the formula to convert Watt to Calorie/Hour?

The formula to convert Watt to Calorie/Hour is: cal/h = W × 860.4206502601. For example, to convert 10 Watt to Calorie/Hour, you would multiply 10 by 860.4206502601.

What is a Watt?