Everyday life
Percentages, discounts, fuel, electricity: everyday maths done in a second, without mistakes.
- Everyday life Discount calculator Work out the sale price, how much you save and the real discount when offers stack, such as a sale plus a coupon code, then add sales tax to see what you pay at checkout.
- Everyday life Electricity cost calculator From an appliance's wattage and how long you use it, work out its energy use in kWh per day, month and year, and what it adds to your electric bill.
- Everyday life Gas cost calculator for road trips Estimate the gallons and gas cost of a drive from the distance, your car's mpg and the price per gallon, add tolls, and split the cost between passengers.
- Everyday life Percentage calculator Enter two numbers and get the five everyday percentage calculations at once: X% of Y, X as a percentage of Y, percent change from X to Y, and Y increased or decreased by X%.
- Everyday life BTU calculator Find the cooling capacity in BTU your room needs, using the ENERGY STAR sizing chart, adjusted for sun, occupants and kitchens, plus a space heater estimate.
- Everyday life Cubic feet calculator Calculate the volume of boxes in cubic feet and cubic meters, the moving truck size you need and the dimensional weight carriers will bill.
- Everyday life Dilution ratio calculator Work out how much concentrate and water to mix for a 1:X ratio, or how to dilute a solution to a target strength with C1V1 = C2V2.
- Everyday life Download time calculator Estimate how long a file, game or backup takes to download or upload at your internet speed, with a realistic allowance for overhead.
- Everyday life Gas mileage calculator Measure your real fuel economy from a full tank, convert it to L/100 km, and see what each mile and each year of driving costs.
- Everyday life Mileage reimbursement calculator Turn business, medical or charity miles into a reimbursement or deduction with the IRS standard mileage rates, including the July 2026 increase.
- Everyday life Recipe scaling calculator Resize a recipe for any number of servings, ingredient by ingredient, and adjust for a different pan size.
- Everyday life Solar panel calculator Estimate how much electricity a home solar system produces, what it saves on your bill and how long it takes to pay for itself.
- Everyday life Speed, distance and time calculator Find the speed, the distance or the travel time when you know the other two, in miles and kilometers.
- Everyday life TV size and viewing distance calculator Get the width and height of a screen from its diagonal, the best seating distance for a cinematic view, and its pixel density.
- Everyday life Tire size calculator Decode a tire size such as 225/60R16, compare it with a new size, and see how much the diameter and your speedometer reading change.
- Everyday life Unit price calculator Compare two package sizes by their price per ounce, pound, count or any unit, and see how much you save with the cheaper one.