Running costs for an AGA depend on its age, fuel type, size and how it is used. Older models that stay on continuously can use a lot of energy, while modern electric or converted AGAs are far more efficient and flexible. Here’s what affects cost and how you can manage it.
Average Running Costs by Fuel Type
The figures below are approximate and based on current UK energy prices as of 2025. Actual costs vary depending on your supplier, usage patterns and kitchen insulation.
| Type of AGA | Typical Cost Per Week | Notes |
|---|---|---|
| Oil-fired AGA | £40–£60 | Uses 40–60 litres of kerosene per week if left on constantly |
| Gas AGA | £30–£45 | More efficient than oil but still designed for continuous operation |
| Electric AGA (modern) | £15–£30 | Controllable systems allow switching zones on and off as needed |
| Converted AGA (Eco system) | £10–£25 | Highly efficient with independent oven and hotplate control |
What Affects Running Costs
- Usage habits: Keeping the cooker on all the time will use more energy than turning it on only when needed.
- Insulation: Poor insulation allows heat to escape, meaning the cooker must work harder to maintain temperature.
- Fuel efficiency: Older burners and thermostats may waste energy compared to newer systems.
- Ventilation and room size: Larger kitchens lose heat faster, especially if doors or windows are often open.
Reducing Your AGA Running Costs
- Upgrade to an electric or Eco conversion to gain temperature control
- Ensure your AGA is properly insulated and serviced regularly
- Keep lids and doors closed to retain heat
- Cook in batches and use the ovens efficiently
- Use timers or smart controls to switch zones on and off
Efficiency Comparison
Modern electric systems typically use between 40% and 70% less energy than traditional oil or gas AGAs. The ability to heat only what you need makes the biggest difference, especially for smaller households or seasonal use.
Professional Advice
If your AGA is using more fuel than expected, it may need servicing or insulation renewal. At Smart Range, we refurbish, convert and maintain AGAs across Surrey, Kent, Sussex and London. Contact us for a service quote or to find out about upgrading to an efficient electric system.
