Convert anything, instantly.

Convert length, weight, temperature, area, currency, and more with live results, formulas, and conversion tables.

What is HowMuch?

HowMuch is a free, browser-based unit converter covering 29 categories — from everyday measurements like length, weight, and temperature to science and engineering units like energy, torque, and electric current. Every conversion runs instantly in your browser; no sign-up, no app download, and no data is sent to any server.

Each converter page shows the result as you type, alongside a reference table of common values and the exact mathematical formula used. That way you can double-check the calculation or use the formula in your own work. The world clock shows live analogue clock faces for 35+ cities so you can see at a glance what time it is anywhere on the planet.

HowMuch works equally well on desktop and mobile. Your recently used conversions and saved favourites are stored locally in your browser — they persist across visits without an account and are never shared or tracked.

Featured converters

Most popular tools on HowMuch

Length & DistanceConvert meters to feet, miles to kilometres, inches to centimetres and 20+ other length units. Instant results with a full reference table.Weight & MassKilograms to pounds, stones to kg, ounces to grams — all common weight units covered with accurate conversion factors.TemperatureCelsius to Fahrenheit, Kelvin and Rankine — exact formula shown alongside the result so you can verify the maths yourself.CurrencyConvert between major world currencies including USD, EUR, GBP, BAM and RSD using reference exchange rates.AreaSquare metres to square feet, acres to hectares, and more. Covers SI and imperial area units used in real estate and science.World ClockCurrent local time in 35+ cities across every major timezone — analogue clock faces, updated every second.

Popular conversions

Meter to FootMeter to YardMeter to InchKilometer to MileCentimeter to InchMillimeter to InchMile to YardFoot to InchYard to FootNautical Mile to Mile

All converters

LengthConvert between metric and imperial length and distance units such as meters, feet, kilometers, and miles.9 unitsWeightConvert between metric and imperial weight and mass units such as kilograms, pounds, ounces, and stones.8 unitsTemperatureConvert between Celsius, Fahrenheit, Kelvin, and Rankine temperature scales.4 unitsAreaConvert between metric and imperial area units such as square meters, acres, hectares, and square feet.9 unitsCurrencyConvert between world currencies using up-to-date exchange rates.10 unitsVolumeConvert between metric and US customary volume units such as liters, gallons, cups, and cubic meters.11 unitsSpeedConvert between speed units such as kilometers per hour, miles per hour, and knots.5 unitsTimeConvert between time units such as seconds, minutes, hours, days, and years.8 unitsData StorageConvert between digital storage units such as bytes, kilobytes, megabytes, gigabytes, and terabytes.6 unitsPressureConvert between pressure units such as pascals, bars, psi, and atmospheres.6 unitsEnergyConvert between energy units such as joules, calories, watt-hours, and BTU.7 unitsPowerConvert between power units such as watts, kilowatts, and horsepower.5 unitsForceConvert between force units such as newtons, pound-force, and kilogram-force.5 unitsAngleConvert between angle units such as degrees, radians, and gradians.6 unitsFrequencyConvert between frequency units such as hertz, kilohertz, and revolutions per minute.5 unitsFuel ConsumptionConvert between fuel economy units such as miles per gallon, kilometers per liter, and liters per 100km.4 unitsDensityConvert between density units such as kilograms per cubic meter, grams per cubic centimeter, and pounds per cubic foot.5 unitsTorqueConvert between torque units such as newton-meters, pound-feet, and pound-inches.4 unitsElectric CurrentConvert between electric current units such as amperes, milliamperes, and microamperes.4 unitsVoltageConvert between voltage units such as volts, millivolts, and kilovolts.5 unitsResistanceConvert between electrical resistance units such as ohms, kiloohms, and megaohms.4 unitsCapacitanceConvert between capacitance units such as farads, microfarads, and picofarads.5 unitsInductanceConvert between inductance units such as henries, millihenries, and microhenries.4 unitsMagnetic FluxConvert between magnetic flux units such as webers and maxwells.3 unitsLuminanceConvert between luminance units such as candela per square meter, stilb, and lambert.4 unitsIlluminanceConvert between illuminance units such as lux, foot-candles, and phot.3 unitsFlow RateConvert between fluid flow rate units such as liters per second, gallons per minute, and cubic meters per hour.6 unitsCooking MeasurementsConvert between cooking measurement units such as cups, tablespoons, teaspoons, and milliliters.9 unitsShoe SizeConvert men's shoe sizes between US, UK, and EU sizing systems (approximate, brand sizing may vary).4 unitsTypography UnitsConvert between typography and print units such as points, picas, pixels, and inches.6 unitsScientific UnitsConvert between amount-of-substance units such as moles, millimoles, and particle counts.4 units

How to use HowMuch

Select a category from the menu or type a unit name in the search bar — for example “miles to km” or “kg to lbs” — and you will be taken directly to the right converter page. On the converter page, choose your source and target units from the dropdowns, type a value, and the converted result appears instantly. You can also swap the direction with one click or adjust the decimal precision.

Below the converter widget each page shows a reference table with pre-calculated values (e.g. 1–100 metres in feet) and the exact conversion formula. This is useful when you need to present the calculation to someone else or build it into a spreadsheet.

All conversion results are provided for reference only. For critical engineering, medical, or legal calculations, verify results with a qualified professional or the relevant standards body.

Have a suggestion for a new converter or spotted an error? Get in touch — we aim to respond within 1–3 business days.

All conversions are provided for reference. Verify critical calculations independently. KolikoJe (Bosnian calculators) →