To convert megawatts to kilocalories per hour, multiply by 860,420.6501. That factor is the whole relationship: both units measure power, so the conversion is a proportion with no offset and no substance-specific constant.
A metabolic and heating unit: 1,000 kcal/h is a little over one kilowatt. The unit for power stations and grid-scale generation.
Power is not energy. A watt is a rate; a watt-hour is an amount. A 2 kW heater running for three hours uses 6 kWh, and no conversion factor turns one into the other without a time. Horsepower also comes in two sizes: mechanical hp is 745.7 W, metric PS is 735.5 W. Below the calculator there is a step table for the values people look up most, and a second table putting real power figures into kilocalories per hour so the number you get has something to be compared against.
The formula
megawatts- The amount you are converting, in megawatts
860,420.650096- The exact number of kilocalories per hour in one megawatt
kilocalories per hour- The converted result
How it works, step by step
- Enter the value in megawatts.
- It is multiplied by 860,420.650096, the exact factor between the two units.
- The answer is shown in kilocalories per hour, with the reverse conversion beneath it.
- Check the reference table if you want a figure of comparable size.
Worked examples
A family car: 0.09 MW in kilocalories per hour
A family car comes to about 0.09 MW. Multiplying by the factor: 0.09 × 860,421 = 77,437.9 kcal/h. Dividing the answer back by 860,421 returns the figure you started with, which is the quickest way to check you have the factor the right way up.
A human at rest: 0.0001 MW in kilocalories per hour
Take a human at rest, roughly 0.0001 MW. The conversion is a single multiplication — 0.0001 × 860,421 — giving 86.0421 kcal/h. Because the relationship is proportional, doubling the input doubles the answer to 172.084 kcal/h.
How to read your score
Frequently asked questions
How many kilocalories per hour are in one megawatt?
Exactly 860,420.650096. Every figure on this page is that one number multiplied by your input, so the only rounding is at the display step.
What is the formula to convert megawatts to kilocalories per hour?
kilocalories per hour = megawatts × 860,420.650096. Reversed, megawatts = kilocalories per hour ÷ 860,420.650096, which is the same as multiplying by 1.16222222222e-06.
Which is the bigger unit, the megawatt or the kilocalorie per hour?
The megawatt. One megawatt equals 860,421 kilocalories per hour.
What does this quantity actually measure?
Both units measure power. That is why a single factor is enough: there is no temperature offset and no material property involved, unlike conversions that cross between different quantities.
What is a megawatt?
The unit for power stations and grid-scale generation.
What is a kilocalorie per hour?
A metabolic and heating unit: 1,000 kcal/h is a little over one kilowatt.
Why does my answer differ from another converter?
Almost always because the other tool rounded the factor before multiplying. This page keeps full double precision through the calculation and rounds only for display, and it prints the factor it used so you can see where any difference came from.
Is there a quick way to do MW to kcal/h in my head?
Plenty of people do this in their head: multiply by 860,000 instead of using the exact factor 860,420.6501. At 100 that shortcut gives 86,000,000 kilocalories per hour, off by 42065.009560 kilocalories per hour or about 0.05%. Fine for a rough estimate, not fine for anything you are cutting to size or dosing.
Megawatts to kilocalories per hour reference tables
| Megawatts | Kilocalories Per Hour |
|---|---|
| 0.5 MW | 430,210 kcal/h |
| 1 MW | 860,421 kcal/h |
| 2 MW | 1.72084e+06 kcal/h |
| 3 MW | 2.58126e+06 kcal/h |
| 5 MW | 4.3021e+06 kcal/h |
| 10 MW | 8.60421e+06 kcal/h |
| 20 MW | 1.72084e+07 kcal/h |
| 25 MW | 2.15105e+07 kcal/h |
| 50 MW | 4.3021e+07 kcal/h |
| 75 MW | 6.45315e+07 kcal/h |
| 100 MW | 8.60421e+07 kcal/h |
| 250 MW | 2.15105e+08 kcal/h |
| 500 MW | 4.3021e+08 kcal/h |
| 1000 MW | 8.60421e+08 kcal/h |
| 5000 MW | 4.3021e+09 kcal/h |
Exact factor: 1 megawatt = 860,420.650096 kilocalories per hour.
| Quantity | MW | kcal/h |
|---|---|---|
| A LED bulb | 9e-06 MW | 7.744 kcal/h |
| A human at rest | 0.0001 MW | 86.04 kcal/h |
| A microwave oven | 0.0009 MW | 774.4 kcal/h |
| A domestic kettle | 0.003 MW | 2581 kcal/h |
| A family car | 0.09 MW | 7.744e+04 kcal/h |
| A wind turbine | 3 MW | 2.581e+06 kcal/h |
Published reference values, converted with the same factor this page uses.