Kilowatt-hours to Calories Converter
1 kilowatt-hour ≈ 860,420.65 calories
This is the small calorie. The "Calorie" on food labels is a kilocalorie, which is 1,000 of these.
1 kilowatt-hour equals 860,421 calories
How to convert kilowatt-hours to calories
Calories here are thermochemical (4.184 J), while BTU uses the International Table definition. A kilowatt-hour is energy (3.6 MJ), not power; a food Calorie is a kilocalorie.
cal = kWh × 860420.6501One kilowatt-hour is 860420.6501 calories, so a single multiplication converts any value.
8,604,210 cal ≈ 10 × 860420.6501This is the small calorie. The "Calorie" on food labels is a kilocalorie, which is 1,000 of these.
Kilowatt-hours to calories conversion table
Common values in kilowatt-hours, converted to calories.
| Kilowatt-hours (kWh) | Calories (cal) |
|---|---|
| 1 | 860,420.65 |
| 2 | 1,720,841.3 |
| 3 | 2,581,262 |
| 4 | 3,441,682.6 |
| 5 | 4,302,103.3 |
| 10 | 8,604,206.5 |
| 20 | 17,208,413 |
| 25 | 21,510,516 |
| 50 | 43,021,033 |
| 100 | 86,042,065 |
| 250 | 215,105,160 |
| 500 | 430,210,330 |
| 1,000 | 860,420,650 |
About these units
kilowatt-hourkWh
One kilowatt sustained for one hour: exactly 3.6 megajoules. The billing unit for electricity.
caloriecal
The thermochemical calorie: exactly 4.184 joules.
Reference: NIST Special Publication 811.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.