Measurement index
Every dimension has a place.
Browse practical categories from daily measurements to technical, digital, astronomical, and historically variable systems.
29category families900+unit labels represented
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8 CATEGORIESArea
28 unitsSurface measures for land, construction, science, and print.m²acrehaVolume & capacity
52 unitsMetric, US, Imperial, cooking, and cubic volume measures.Lm³galMass & weight
39 unitsMetric, avoirdupois, troy, regional, and technical mass units.kglbozTemperature
8 unitsAbsolute and everyday temperature scales with clear affine relationships.°C°FKTime & duration
27 unitsSubsecond timing through calendar-scale durations.sminhSpeed & velocity
26 unitsRoad, marine, aviation, scientific, and sporting speed units.m/skm/hknCooking measures
34 unitsVolume, mass, spoon, cup, and oven-temperature references.tspcupgMechanics
4 CATEGORIESForce & torque
31 unitsLinear and rotational mechanical effects in SI and customary systems.NlbfN·mEnergy, work & heat
45 unitsMechanical, electrical, thermal, food, and atomic energy measures.JkWhBTUPower
24 unitsRates of work and energy transfer across mechanical and electrical systems.WhpBTU/hPressure & stress
38 unitsAtmospheric, hydraulic, vacuum, material, and acoustic pressure.PabarpsiFluids & heat
3 CATEGORIESFlow & fluids
57 unitsVolumetric, mass, gas, leak, and irrigation flow rates.L/minm³/hgpmViscosity & fluid properties
29 unitsDynamic and kinematic viscosity, surface tension, and permeability.Pa·scPStThermal properties
43 unitsConductivity, resistance, heat capacity, flux, and expansion.W/m·KK/WJ/kg·KElectricity & light
3 CATEGORIESRadiation & chemistry
3 CATEGORIESRadiation & nuclear
26 unitsDistinct activity, absorbed dose, equivalent dose, and exposure measures.BqGySvChemistry & concentration
49 unitsAmount, molarity, molality, fractions, catalytic activity, and pH context.molmol/LppmDensity & materials
41 unitsMass, linear, area, fabric, paper, and material density.kg/m³gsmdenDigital
3 CATEGORIESNavigation & space
2 CATEGORIESEngineering
2 CATEGORIESHistorical
1 CATEGORIESNot sure where a unit belongs?
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