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How Much Does It Cost?

Discover What Everyday Life Really Costs

Free calculators and comparison tools for energy, home improvement, transport, food and household costs. Every formula explained, using your own prices.

  • 30 free calculators
  • Transparent formulas
  • No sign-up

Most used calculators

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Air conditioner running cost calculator What your AC costs per day, month and season. Electricity bill estimator Energy, capacity, fixed charges and configurable taxes. Paint quantity calculator Litres or gallons and tins for walls and ceilings, minus openings. Appliance energy cost comparison Which appliance in your home costs most per year. Trip fuel cost calculator Fuel, total cost and cost per person for a trip. Electric heater running cost calculator Radiators, panel and fan heaters: monthly and seasonal cost. Electric water heater cost calculator Energy to heat water plus standby losses. LED lighting savings calculator How much you save switching bulbs and how fast they pay back.

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10 calculators Energy Appliance running costs and electricity bills Air conditioner running costElectric heater running costFridge running cost 6 calculators Home improvement Materials, quantities and budgets Paint quantityHouse painting costTile 5 calculators Transport Trips, fuel and running costs Trip fuel costMonthly fuel costPetrol vs diesel cost comparison 4 calculators Food Cost per serving, recipes and groceries Recipe cost per servingRecipe scaler: ingredients per servingWeekly grocery budget 5 calculators Home & savings Budgets, moving out and saving Monthly household budgetCost of moving outShared expenses splitter 7 calculators Comparison tools Put two options side by side and see which one really pays off.

Comparison tools

Which option really pays off?

Tumble dryer running cost calculator Cost per cycle and comparison with another dryer. LED lighting savings calculator How much you save switching bulbs and how fast they pay back. Appliance energy cost comparison Which appliance in your home costs most per year. Petrol vs diesel cost comparison Total cost and the distance at which diesel pays off.

Why you can trust these numbers

Formulas in plain sight

Every calculator shows a step-by-step breakdown so you can check it.

Your prices, not ours

Rates are editable: we don’t pretend prices that change every month are fixed.

Private by design

Everything runs in your browser. Your inputs are never sent to a server.

Guides

Guides and explainers

Learn how to work it out yourself and how to read every result.

How to calculate an appliance’s electricity use and cost The watts-to-kWh-to-cost formula explained with examples, and why rated power is not always real consumption. Read guide · 6 min How much paint do I need? A step-by-step method Measure walls, subtract openings, apply coats and coverage: the full method to buy the right amount of paint. Read guide · 5 min How to calculate the fuel cost of a trip The formula in L/100 km and mpg, how to convert between them and what makes real consumption differ from official figures. Read guide · 5 min Electric vs gas car: how to compare total cost of ownership What total cost of ownership means, which items to include and how to work out how many years an EV takes to pay off. Read guide · 7 min

FAQ

Frequently asked questions

Another question? Read our methodology.

Are the calculators free?

Yes. Every tool is free and needs no sign-up. The site is funded by advertising when it is enabled.

Where do the prices come from?

You enter them. Starting values are editable examples, because rates and prices vary by country, supplier and time. That way the result reflects your real situation.

Can I use euros, dollars or pounds?

Yes. Choose currency and unit system (metric or imperial) in preferences, independently of language. Amounts are never converted with made-up exchange rates: you can enter a manual rate if you need one.

Do you store the data I enter?

No. Calculations run in your browser and nothing is sent to a server. If you press “Share”, the data travels inside the link itself.

Are the results exact?

The arithmetic is exact for the data you enter and is shown step by step. The result is only as accurate as that data: it is an indicative estimate, not a bill or a professional quote.

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