Calculator
How much heating oil will I need?
Tell us your home and we'll estimate how much kerosene you'll use in a year — and what it costs at today's live price in your county. No guesswork, no sign-up.
Heating oil calculator
A 3-bed home with a modern boiler uses roughly
~2,400 litres a year
Pick your county to see what that costs at today's local price.
A rough estimate from typical usage — your real use depends on insulation, thermostat habits and the weather. It's a guide, not a quote.
Reference
Typical yearly oil use by home size
A rough starting point for a home with a modern condensing boiler. An older boiler, poor insulation or a cold winter pushes it higher.
| Home | Typical use a year |
|---|---|
| 1-bed | ~1,200 litres |
| 2-bed | ~1,600 litres |
| 3-bed | ~2,400 litres |
| 4-bed | ~3,000 litres |
| 5+ bed | ~3,400 litres |
Heating-oil cost questions
- How much heating oil does a house use per year in Ireland?
- It varies a lot with insulation, how warm you keep the house and the winter, but as a rough guide a smaller 1–2 bed home uses around 1,200–1,600 litres of kerosene a year, a typical 3-bed around 2,400 litres, and a larger 4–5 bed home around 3,000–3,400 litres. An older, non-condensing boiler can add 10–30% on top. Use the calculator above for an estimate tailored to your home.
- How much does it cost to heat a house with oil for a year?
- Take your yearly litres and multiply by the price per litre. For example, a typical 3-bed home using about 2,400 litres, at a price around €1.05 a litre, works out near €2,500 a year — but the price moves constantly and by county, so the calculator uses today's live local price. Filling up when prices dip (and setting a price-drop alert) is the easiest way to bring that figure down.
- How often will I need to fill my oil tank?
- Divide your yearly litres by how much you order. A typical 3-bed home using ~2,400 litres a year, ordering ~900 litres at a time, fills up roughly two to three times a year — but most of that is burned over the winter, so fills cluster between October and March.
- Is this an exact figure?
- No — it's an estimate to help you budget and plan, not a quote or a guarantee. Your real usage depends on your home's insulation, your thermostat habits and the weather. For when you'll actually run low, use our run-out estimate; for what to pay, compare today's live prices in your county.
Know what you'll need — now pay less for it.
You've got a number. The next step is filling that tank for less: compare your county's suppliers for today's cheapest price, and set a free price-drop alert so you can buy when it dips.