800 Kilocalories to Watts – Answer and Calculator Tool

800 kilocalories per hour is approximately 929.08 watts.

This conversion is done by first converting kilocalories per hour to joules per second (watts). Since 1 kilocalorie equals 4184 joules and power is energy per unit time, dividing total energy by seconds in an hour gives watts. So 800 kcal/hr converts to 929.08 W.

Conversion Tool

Conversion Formula

The formula to convert kilocalories per hour (kcal/hr) into watts (W) is:

Watts = (Kilocalories × 4184) / 3600

Explanation:

• 1 kilocalorie equals 4184 joules.
• Power in watts is joules per second.
• Since 1 hour = 3600 seconds, divide total joules by 3600 to get joules/second.

Step-by-step for 800 kcal/hr:

• Multiply 800 kcal by 4184 J: 800 × 4184 = 3,347,200 J
• Divide by 3600 seconds: 3,347,200 / 3600 ≈ 929.08 W

Conversion Example

• 500 kilocalories to watts:
  • Multiply 500 × 4184 = 2,092,000 joules
  • Divide by 3600 seconds: 2,092,000 / 3600 ≈ 581.11 watts
• 1000 kilocalories to watts:
  • 1000 × 4184 = 4,184,000 joules
  • 4,184,000 / 3600 ≈ 1162.22 watts
• 250 kilocalories to watts:
  • 250 × 4184 = 1,046,000 joules
  • 1,046,000 / 3600 ≈ 290.56 watts
• 1200 kilocalories to watts:
  • 1200 × 4184 = 5,020,800 joules
  • 5,020,800 / 3600 ≈ 1394.67 watts

Conversion Chart

The table below shows kilocalories values from 775.0 to 825.0 and their equivalent in watts. To use the chart, find the kilocalorie value closest to your interest and see the corresponding wattage.

Related Conversion Questions

• What is the watt equivalent of 800 kilocalories per hour?
• How many watts does 800 kcal/hr convert into?
• Can you convert 800 kilocalories per hour to watts accurately?
• What formula to use for changing 800 kcal/hr into watts?
• Is 800 kilocalories per hour a high power output in watts?
• How do I calculate watts from 800 kilocalories per hour?
• Does converting 800 kcal/hr to watts require considering time units?

Conversion Definitions

Kilocalories: Kilocalories, often called Calories in food energy, measure the amount of heat energy needed to raise the temperature of one kilogram of water by one degree Celsius. It is a unit used to quantify energy intake or expenditure in nutrition and physics.

Watts: Watts measure power, which is the rate of energy transfer or conversion. One watt equals one joule per second, indicating how quickly energy is used or produced. It is commonly applied in electrical, mechanical, and thermal systems for power rating.

Conversion FAQs

Why do we divide by 3600 when converting kilocalories per hour to watts?

Because power units like watts are joules per second, but kilocalories per hour represent energy per hour. Since one hour has 3600 seconds, dividing the total joules (obtained from kilocalories) by 3600 converts the hourly rate to a per-second rate.

Can I convert kilocalories directly into watts without time consideration?

No, kilocalories measure energy, watts measure power (energy per time). Without specifying the time period, the conversion isn’t meaningful. You must know the energy flow rate, such as kilocalories per hour, to convert to watts correctly.

Are there any common mistakes in converting kilocalories to watts?

Yes, one common mistake is ignoring the time unit or mixing calories with kilocalories. Calories and kilocalories differ by a factor of 1000, and power needs a proper time reference. Forgetting to convert hours to seconds leads to wrong results.

Does the type of kilocalorie (thermochemical vs international) affect the conversion?

Slightly, because different definitions of kilocalorie exist, with minor variations in joule equivalents. However, the international kilocalorie (4184 J) is standard for scientific calculations, so using other definitions may cause small inaccuracies.

How precise is the conversion from 800 kilocalories to watts?

The conversion uses fixed constants and exact time conversion, so it is precise for practical purposes. Minor errors may arise from rounding or using different kilocalorie definitions, but the result around 929 watts is accurate enough for typical use.

Last Updated : 06 July, 2025

Sandeep Bhandari

Sandeep Bhandari holds a Bachelor of Engineering in Computers from Thapar University (2006). He has 20 years of experience in the technology field. He has a keen interest in various technical fields, including database systems, computer networks, and programming. You can read more about him on his bio page.