Unit conversions without the guesswork
45+ free tools for cooking, travel, engineering, science, and learning. No signup, no weird rounding errors — just the number you came for and the context to trust it.
Cooking & kitchen
Recipe scaling, baking, oven temperatures, ingredient swaps.
Travel & everyday
Cross-country shopping, packing, fuel, currency.
Travel cheat sheet
ReferenceCountry-aware: km/mi, °C/°F, kg/lb, km/L/MPG.
Currency
ConverterUSD, EUR, GBP, JPY + 27 more (reference rates).
Shoe sizes
ConverterUS, UK, EU, Japan.
Clothing sizes
ConverterUS, UK, EU, IT, FR.
Length
ConverterMeters, feet, miles, kilometers, inches.
Weight
ConverterPounds, kilograms, stones, tonnes.
Fuel economy
ConverterMPG ↔ L/100km ↔ km/L.
Temperature
ConverterCelsius, Fahrenheit, Kelvin, Rankine.
Temperature by feel
ReferenceWhat does 40 °C actually feel like?
Fun & learning
Quizzes, comparisons, and quick lookups.
Engineering & construction
Mechanical, structural, HVAC, fluids.
Area
Converterm², acres, hectares, ft².
Volume
ConverterLiters, gallons, cups, ml.
Pressure
ConverterPSI, bar, atm, kPa, mmHg.
Force
ConverterNewtons, lbf, dynes, kgf.
Torque
ConverterN·m, ft·lb, in·lb, kg·m.
Power
ConverterWatts, horsepower, BTU/hr.
Energy
ConverterJoules, calories, kWh, BTU.
Flow rate
ConverterGPM, L/s, m³/h, cfm.
Density
Converterkg/m³, g/cm³, lb/ft³, lb/gal.
Viscosity
ConverterPa·s, poise, centipoise.
Speed
Convertermph, kph, knots, m/s.
Acceleration
Converterm/s², ft/s², g-force, gal.
Science, math, time
Physics, astronomy, chemistry, calendar.
Time
ConverterSeconds, minutes, hours, days, years.
Angle
ConverterDegrees, radians, gradians, turns.
Frequency
ConverterHz, kHz, MHz, GHz, RPM.
SI prefix
ConverterYocto through yotta, 24 orders of magnitude.
Concentration
Converterppm, mg/L, percent.
Radiation dose
ConverterSievert, rem, gray, rad.
Sound level (dB)
ConverterDecibel, bel, neper.
Luminous intensity
ConverterCandela, candlepower.
Illuminance
ConverterLux, foot-candle, phot.
Specific heat
ConverterJ/(kg·K), cal/(g·°C), BTU/(lb·°F).
Thermal conductivity
ConverterW/(m·K), BTU·in/(hr·ft²·°F).
Data storage
ConverterKB, MB, GB, TB, bits.
Electrical & magnetic
Circuit design, lab work, EE reference.
Electric charge
ConverterCoulombs, ampere-hours, mAh.
Electric current
ConverterAmperes, milliamperes, abamperes.
Resistance
ConverterOhms, kΩ, MΩ.
Capacitance
ConverterFarads, µF, nF, pF.
Inductance
ConverterHenries, mH, µH, nH.
Magnetic field
ConverterTesla, gauss, millitesla.
Magnetic flux
ConverterWeber, maxwell.
Built by Digital Dashboard Hub
We make reference tools for people who care about getting the number right. If a cup of flour is 120 g in one source and 125 g in another, we'll tell you which to trust and why. No listicles, no fluff.
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