Unit Conversion & Everyday Life
Exact unit conversions from documented constants, plus shopping, cooking and home-project estimators for daily decisions.
- Length ConverterConvert length and distance between metric, US/imperial, nautical and astronomical units, from nanometres to light-years.
- Weight ConverterConvert weight and mass between kilograms, grams, pounds, ounces, stones, tons, carats, grains and troy units.
- Temperature ConverterConvert temperatures between Celsius, Fahrenheit, Kelvin and Rankine, with a check against absolute zero.
- Area ConverterConvert area between square metres, hectares, square kilometres, square feet, square yards, acres and square miles.
- Volume ConverterConvert volume between litres, millilitres, cubic metres, cubic feet and inches, US and imperial gallons, quarts, pints, cups and fluid ounces.
- Speed ConverterConvert speed between km/h, mph, m/s, knots, feet per second and Mach.
- Time Unit ConverterConvert time between seconds, minutes, hours, days, weeks, average months, years, decades and smaller units.
- Pressure ConverterConvert pressure between pascals, kilopascals, bar, psi, atmospheres, torr, mmHg and inches of mercury or water.
- Energy ConverterConvert energy between joules, kilowatt-hours, calories, kilocalories, BTU, electronvolts and foot-pounds.
- Power ConverterConvert power between watts, kilowatts, horsepower (mechanical and metric), BTU per hour and tons of refrigeration.
- Force ConverterConvert force between newtons, kilonewtons, pound-force, kilogram-force, dynes, poundals and kips.
- Torque ConverterConvert torque between newton-metres, pound-force feet and inches, kilogram-force metres and ounce-force inches.
- Density ConverterConvert density between kg/m³, g/cm³, g/mL, kg/L, lb/ft³, lb/in³, lb/gal and more.
- Frequency ConverterConvert frequency between hertz, kilohertz, megahertz, gigahertz, rpm and angular units (rad/s, degrees per second).
- Data Storage ConverterConvert data sizes between bits, bytes, decimal units (kB, MB, GB, TB) and binary units (KiB, MiB, GiB, TiB).
- Data Transfer Rate ConverterConvert data rates between bits and bytes per second: kbps, Mbps, Gbps, MB/s, MiB/s and more.
- Fuel Economy ConverterConvert fuel economy between mpg (US and imperial), litres per 100 km, km per litre and miles per litre.
- Cooking Measurement ConverterConvert cooking measurements between US, metric and imperial cups, spoons and fluid ounces, and between volume and grams for common ingredients.
- Recipe Scaling CalculatorScale a recipe to more or fewer servings, with quantities shown as kitchen-friendly fractions and exact decimals.
- Ingredient Ratio CalculatorUse baker’s percentages to calculate ingredient weights from flour weight or total dough weight, with hydration.
- Tip CalculatorCalculate a tip and split the bill among several people, optionally tipping on the pre-tax amount and rounding up.
- Bill Splitting CalculatorSplit a bill with tax and tip evenly or by uneven shares, with amounts that add up exactly to the cent.
- Discount CalculatorCalculate the sale price and savings from a percentage or fixed-amount discount, with optional sales tax afterwards.
- Double Discount CalculatorCalculate the final price after two stacked discounts and the true combined discount percentage.
- Sales Price CalculatorFind the percentage discount and savings from an original (“was”) price and a sale (“now”) price.
- Unit Price Comparison CalculatorCompare unit prices for up to three package sizes to find the best value per gram, litre, item or any unit.
- Shopping Savings CalculatorTotal your savings on a shopping trip from sale prices, quantities, basket coupons and cashback.
- Grocery Budget CalculatorBuild a weekly, monthly and yearly grocery and food budget from household size, your own per-person spending and eating out.
- Paint Quantity EstimatorEstimate how much paint you need for a room from wall size, doors, windows, number of coats and the coverage on the label.
- Flooring Quantity EstimatorEstimate boxes of flooring for a room with a waste allowance, plus the material cost.
- Tile Quantity EstimatorEstimate the number of tiles and boxes for an area, accounting for tile size, grout joint width and waste.
- Wallpaper Quantity EstimatorEstimate wallpaper rolls from wall width and height, roll size and pattern repeat, using the drop (strip) method.
- Concrete Volume EstimatorEstimate concrete volume for slabs, footings or round columns in m³, yd³ and ft³, plus premix bags, with waste.
- Moving Volume EstimatorEstimate the load space needed for a move from moving boxes and furniture dimensions, and check it against a vehicle’s capacity.
- Fuel Cost CalculatorCalculate the fuel cost and fuel used for a journey from distance, fuel economy in any unit and fuel price per litre or gallon.