Smart Meter / Appliance Cost Calculator
Calculate daily electricity cost from individual appliances. Adjust usage hours for each device.
Last updated: April 2026 · Source: GOV.UK — Smart meters
Estimated Daily Electricity Cost
£2.81
11.5 kWh/day · £85.50/month · £1,025.26/year
Disclaimer
This calculator is provided for informational purposes only and should not be considered as financial or tax advice. All calculations are performed locally in your browser — no personal data is collected or sent to our servers. Rates and thresholds are sourced from HMRC and GOV.UK and are updated for the current tax year. Always verify results with HMRC or consult a qualified professional before making financial decisions.
How It Works
A smart meter sends automatic readings to your energy supplier, eliminating estimated bills and giving you accurate real-time data on your energy usage. The in-home display (IHD) shows your spending in pounds and pence, making it easier to identify wasteful habits and reduce consumption. Smart meters are provided free of charge by your supplier.
Research by the Department for Energy Security and Net Zero suggests smart meter users reduce their electricity consumption by 2-4% and gas consumption by 3-5% through better awareness. For an average household, this translates to savings of £40-£90 per year. The biggest savings come from identifying and reducing standby consumption and unnecessary heating.
Smart meters also enable access to time-of-use tariffs that charge different rates at different times of day. By shifting usage to off-peak periods (running dishwashers and washing machines at night), you can save significantly more. This calculator estimates your potential savings based on your current consumption and usage patterns.
Example: Average household switching to a smart meter
- Current annual energy bill: £1,779
- Electricity saving (3%): 2,700 kWh x 3% x 24.5p = £19.85
- Gas saving (4%): 11,500 kWh x 4% x 6.76p = £31.10
- Awareness savings total: £50.95/year
- Time-of-use tariff (additional saving): £30-£80/year
- Total potential saving: £81-£131/year
Source: GOV.UK — Smart meters
Frequently Asked Questions
- What does the Smart Meter / Appliance Cost Calculator do?
- Calculate daily electricity cost from individual appliances. Adjust usage hours for each device. All calculations are performed in your browser using official UK rates and thresholds.
- Does this reflect the current energy price cap?
- This calculator uses representative energy prices. The Ofgem energy price cap changes quarterly — check Ofgem's website for the latest cap level applicable to your region and payment method.
- Can I save money by switching tariff?
- Potentially yes. The energy market offers various fixed and variable tariffs. Use a comparison site authorised by Ofgem (such as Ofgem's own comparison tool) to check if switching could save you money.