Household calculators
Five calculators for the jobs and bills around the house, the kitchen and the car.
- Cooking Measurement ConverterCups to grams and back for common ingredients.
- Paint CalculatorHow many gallons or liters of paint for a room.
- Area and Square Footage CalculatorArea of rectangles, circles, triangles and more.
- Trip Fuel Cost CalculatorFuel needed and cost for a trip.
- Electricity Cost CalculatorRunning cost of any appliance.
These calculators answer practical questions: how much paint to buy, how many square feet a floor covers, what a road trip will cost in fuel, how many grams are in a cup, and what an appliance adds to your electricity bill.
Change any number and the result updates straight away. The figures are estimates for planning, so check the label, your bill or your supplier for the final numbers.
Which tool should I use?
- Buying paint for a room? Paint Calculator. Gallons or liters needed, with doors, windows and coats.
- Ordering flooring, tiles or turf? Area and Square Footage Calculator. Area and perimeter of common shapes, with a waste allowance.
- Planning a road trip? Trip Fuel Cost Calculator. Fuel needed and cost, in MPG, L/100 km or km/L.
- Following a recipe from another country? Cooking Measurement Converter. Cups to grams and ounces for common ingredients.
- Wondering what an appliance costs to run? Electricity Cost Calculator. Daily, monthly and yearly cost from watts and hours.
Guides for these tools
- Cups to Grams: A Baking Conversion Guide. Why cups do not convert with one number, with a chart of 13 ingredients.