Smart AI calculators for fast, accurate results
Finance, measurement conversion, cooking, health, maths and home projects — every tool on its own page.
Measurement & unit converters
Currency Converter (Live Rates)Convert every world currency with live exchange rates that update automatically.Length & Height ConverterConvert height, distance and length between metric and imperial units.Mass & Weight ConverterSwitch between grams, kilograms, pounds, ounces, tons and more.Volume ConverterLiters, milliliters, gallons, cups, pints and cubic units.Area ConverterSquare meters, square feet, acres, hectares and more.Force ConverterNewtons, kilonewtons, pound-force, dyne and kilogram-force.Energy ConverterJoules, calories, kilowatt-hours, BTU and electronvolts.Speed Converterkm/h, mph, m/s, knots and feet per second.Pressure ConverterPascal, bar, psi, atmosphere and millimeters of mercury.Power ConverterWatts, kilowatts, horsepower and BTU per hour.Time ConverterSeconds, minutes, hours, days, weeks and years.Digital Storage ConverterBytes, kilobytes, megabytes, gigabytes and terabytes.Angle ConverterDegrees, radians, gradians and turns.Fuel Economy ConverterKilometers per liter, MPG (US) and MPG (UK).
Finance calculators
Loan / EMI CalculatorWork out the monthly payment, total interest and total cost of any loan.Mortgage CalculatorEstimate a mortgage payment including down payment, taxes and insurance.Compound Interest CalculatorSee how an investment grows with regular contributions and compounding.Simple Interest CalculatorCalculate flat interest on a principal amount over time.ROI & CAGR CalculatorMeasure return on investment and annualised growth rate.Sales Tax & VAT CalculatorAdd or remove tax from any price instantly.Discount CalculatorFind the sale price and how much you save.Tip & Bill Split CalculatorSplit a restaurant bill fairly, tip included.Inflation CalculatorSee what money today will be worth after inflation.
Cooking calculators
Recipe ScalerRescale any ingredient quantity for a different number of servings.Cups to Grams ConverterConvert cup measurements to grams and ounces per ingredient.Oven Temperature ConverterCelsius, Fahrenheit, fan setting and UK gas mark.Baking Pan ConverterAdjust batter quantity when swapping pan sizes.
Health calculators
BMI CalculatorBody Mass Index from your height and weight, with category.Body Fat CalculatorEstimate body fat percentage using the US Navy method.Ideal Weight CalculatorHealthy weight targets from the Devine and Hamwi formulas.Daily Water Intake CalculatorHow much water to drink based on weight and exercise.Calories Burned CalculatorEnergy burned during an activity using MET values.
Maths calculators
Percentage CalculatorFind percentages of numbers and percentage change.Ratio CalculatorSimplify ratios and solve for the missing value.GCD & LCM CalculatorGreatest common divisor and least common multiple.Quadratic Equation SolverSolve ax² + bx + c = 0 including complex roots.Circle CalculatorArea, circumference and diameter from a radius.Right Triangle CalculatorHypotenuse, area and angles from two sides.
Home & Garden calculators
Paint CalculatorLitres of paint needed for walls, coats included.Concrete CalculatorConcrete volume and bags for a slab or footing.Tile CalculatorNumber of tiles required including wastage.Wallpaper CalculatorRolls needed for a room with standard 10 m rolls.Electricity Cost CalculatorRunning cost of any appliance per day, month and year.