Everyday Calculators
Practical everyday tools — fuel cost, cooking conversions, sleep, unit prices, and more.
15 calculators
- Fuel Cost CalculatorEstimate the fuel cost of a trip from the distance, your vehicle's fuel economy, and the price of fuel — with round-trip and per-person totals.
- Fuel Economy CalculatorConvert fuel economy between US mpg, UK mpg, litres per 100 km, and km per litre — or work it out from the distance driven and fuel used.
- Cooking Measurement ConverterConvert between cups, tablespoons, teaspoons, millilitres, and more, and read oven temperatures across Celsius, Fahrenheit, and gas mark.
- Sleep CalculatorFind the best times to go to sleep or wake up based on 90-minute sleep cycles, so you wake at the end of a cycle feeling refreshed.
- Unit Price CalculatorCompare two products by price per unit to find the better deal, accounting for pack size and quantity — the bigger package is not always cheaper.
- Speed, Distance & Time CalculatorSolve for speed, distance, or travel time from the other two, mixing miles, kilometres, mph, km/h, and m/s with hours and minutes.
- Aspect Ratio CalculatorResize an image or screen while keeping its aspect ratio, or find the ratio of any width and height — for photos, video, and displays.
- Reading Time CalculatorEstimate how long a text takes to read silently, read aloud, or skim from its word count, plus a handy page-count and reading-speed reference.
- Coffee Ratio CalculatorCalculate how much coffee and water to use for a consistent brew from a ratio like 1:16, working from the water, the coffee, or the number of cups.
- Recipe ScalerScale a recipe up or down between serving sizes: get the multiplier and the converted quantity for any ingredient, plus what to watch when scaling.
- Bill Split CalculatorSplit a restaurant bill with tip evenly among a group, with the per-person share, tip amount, and grand total — and an option to round each share up.
- Dog Age CalculatorConvert your dog's age into human years using a size-adjusted model, with the first two years counting for much more — not the outdated 'times seven' rule.
- PPI / Pixel Density CalculatorCalculate a screen's pixel density (PPI) from its resolution and diagonal size, with the dot pitch, physical dimensions, and total megapixels.
- EV Charging Time CalculatorEstimate how long an electric car takes to charge from one battery percentage to another, based on battery size, charger power, and charging efficiency, plus the cost.
- Height ConverterConvert height between feet-and-inches and centimetres in either direction, with metres and total inches — handling the composite feet-plus-inches format.