Heating Oil: Calculate Output and Energy from the Calorific Value
Calculator for power and energy of a heating system operated with fuel oil. Heating oil has a calorific value of almost 10 kilowatt hours per liter and a density of around 0.82 to 0.86 kilograms per liter. Your dealer should be able to tell you the exact values of your heating oil. You can specify the quantity in liters or kilograms, with liters being the more common form. From the calorific value and quantity, the energy can be calculated which is ideally extracted from the relevant quantity. If you specify a time in days (d), hours (h) and/or minutes (m) in which the specified amount is burned, then the average power of the heating is also calculated in kilowatts. The density only is important if the amount of heating oil is specified in kilograms.
Example: 2000 liters of heating oil have an energy of 19600 kilowatt hours. If you consume this in one year (365 days), you have an average heat output of 2237 watts.
After coal, heating oil is one of the most harmful heat sources for the environment, climate, and health. Emissions of carbon dioxide (CO2) are very high, at 2.7 kilograms per liter or 266 grams per kilowatt hour. Heating oil vapors contain numerous pollutants, such as the carcinogenic polycyclic aromatic hydrocarbons. Spilled heating oil is highly toxic to many aquatic organisms. Its combustion produces, among other things, nitrogen oxides and particulate matter.
Last updated on 03/19/2025. Author: Jürgen Kummer
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