iUnit is a powerful yet easy to use unit conversion app. You can convert between 1650 different units in 57 categories quickly and easily.

Unit converts between the following types of units:

Acceleration
Acoustic impedance
Angle
Angular Acceleration
Area
Basis Weight
Capacitance
Charge (Electrical)
Computer Storage
Concentration
Conductance (Electrical)
Corrosion Rate
Data Transfer Rate
Density
Diffusitivity
Distance
Electrical Conductance
Energy
Enthalpy - mass basis
Enthalpy - mol basis
Enthalpy - volume basis
Entropy
Frequency
Force
Heat Capacity
Heat Flux
Heat Rate
Heat Transfer Coefficient
Liquid Solution Concentration
Luminous Luminence
Luminous Intensity
Magnetic Flux
Magnetic Flux Density
Magnetic Field Strength
Mass
Mass Flow Rate
Molar Concentration
Mole Flow Rate
Moment-Torque
Momentum
Power
Pressure
Radiation Activity
Stress
Surface Tension
Temperature
Thermal Conductivity
Thermal expansion - linear
Thermal expansion - volume
Time
Type (printer's)
Velocity
Viscosity (Kinematic)
Viscosity (Dynamic)
Viscosity (Oil and Water)
Volume
Volume Flow Rate