Every CalcBeast tool
Browse every CalcBeast calculator and UK running-cost comparison guide. Free browser-based tools for energy bills, appliances, heating, solar, EVs and more.
Energy & home running costs
Work out what heating, appliances, and home upgrades actually cost to run. Built for UK energy prices, with gas-vs-electric comparisons before you commit to a quote.
- Loft Insulation Cost Calculator UK Estimate loft insulation cost, DIY versus professional installation, annual heating savings and payback for a UK home.
- Electricity Bill Calculator Calculate a UK electricity bill from kWh usage, unit rate, standing charge, billing period and VAT.
- Gas Boiler Running Cost Calculator Estimate gas boiler running cost per day, month and year from boiler output, usage hours, gas price and efficiency.
- Home Battery Savings Calculator Estimate UK home battery savings and payback from battery capacity, installed cost, tariff spread and round-trip efficiency.
- Heat Pump Running Cost Calculator UK Estimate UK heat pump running costs from SCOP and electricity price, then compare grants and break-even against a gas boiler.
- Solar Panel Payback Calculator UK Work out solar panel payback, break-even time, bill savings, SEG export income and ROI for a UK home.
- Electricity Cost Calculator Calculate appliance running costs for electric heaters, washing machines, tumble dryers, kettles and more.
- Electric Car Charging Cost Calculator Estimate UK electric car charging cost, EV cost per mile, home charging cost and savings versus petrol.
- Dehumidifier Running Cost Calculator Work out what a dehumidifier costs to run per hour, day and month from its wattage and your electricity price.
- Oil-Filled Radiator Running Cost Calculator Calculate the running cost of an oil-filled radiator per hour and day from its wattage and your unit rate.
- Electric Blanket Running Cost Calculator See what an electric blanket or heated throw costs to run per hour and per night at UK electricity prices.
- Air Conditioning Running Cost Calculator Estimate air conditioning running cost per hour and day for portable and split units at UK prices.
- Immersion Heater Running Cost Calculator Calculate tank-heating energy, time and cost using water volume, temperature rise, tariff and standing heat loss.
- Storage Heater Running Cost Calculator Model Economy 7 or Economy 10 overnight charging, daytime boost and seasonal storage-heater cost.
Running-cost comparisons
Compare real household decisions using your own tariff. Defaults show the current Ofgem average and every assumption is editable.
- Fan vs Portable Air Conditioner Running Cost Compare the cost of a fan and portable air conditioner using your own electricity tariff.
- Dehumidifier vs Heated Airer vs Tumble Dryer Compare common clothes-drying options by wattage, time per load, and monthly running cost.
- Electric Blanket vs Electric Heater Compare heating the person with heating the room at your own UK unit rate.
- Air Fryer vs Oven Running Cost Estimate the electricity cost of cooking the same meal in an air fryer or electric oven.