Derived Units in SI Measurements

A unit that is derived from one or more base units of measurement.

A unit of measurement that has a specific name and symbol assigned to it, often representing a complex combination of base units.

A unit of measurement expressed as a combination of base units. No specific name or symbol is assigned to it.

The process of analyzing the dimensional consistency of a physical quantity by expressing it in terms of its fundamental dimensions (length, mass, time, etc.).

The SI unit of frequency, representing one cycle per second.

The SI unit of force, representing the amount of force needed to accelerate a 1 kg mass at 1 meter per second squared.

The SI unit of energy, representing the amount of energy needed to move a 1 kg mass over a distance of 1 meter with a force of 1 Newton.

The SI unit of power, representing the rate at which energy is transferred or used.

The amount of space a two-dimensional object takes up, calculated by multiplying length by width.

The amount of space a three-dimensional object takes up, calculated by multiplying length by width by height.

The ratio of mass to volume, representing how much matter is packed into a given space.

The amount of a substance dissolved in a given volume of solution, often expressed in moles per liter.

The rate of change of position over time, often expressed in meters per second.

The rate of change of speed over time, often expressed in meters per second squared.

The rate of change of angular position (angle) over time, often expressed in radians per second.

The amount of electric current passing through a given cross-sectional area, often expressed in amperes per square meter.

The reciprocal of wavelength, often expressed in reciprocal meters.

The volume occupied by a substance per unit mass, often expressed in cubic meters per kilogram.

A unit of time equal to 60 seconds.

A unit of time equal to 60 minutes.

A unit of time equal to 24 hours.

A unit of length equal to the average distance between the Earth and the Sun.

A unit of plane angle, equal to 1/360th of a full circle.

A unit of plane angle, equal to 1/60th of a degree.

A unit of plane angle, equal to 1/60th of a minute.

A unit of area equal to 10,000 square meters.

A unit of volume equal to one cubic decimeter.

A unit of mass equal to 1000 kilograms.

Originally defined as 1/86400 of a day, but now based on the frequency of radiation emitted by a cesium-133 atom. This standard ensures a precise and unchanging unit.

Initially based on the distance from the equator to the North Pole, the modern meter is defined as the distance light travels in a vacuum in 1/299792458 of a second. This definition connects the meter to the speed of light, a fundamental constant.

Originally defined as the mass of a liter of water, the kilogram now relies on Planck's constant, a fundamental constant in quantum physics, and the definitions of the meter and second. This definition connects the kilogram to the fundamental laws of nature.

Originally defined by the amount of silver deposited by an electric current, the ampere is now based on the fundamental electric charge of an electron, a constant value. This definition connects the ampere to the building blocks of electric charge.

Initially defined by the freezing point of water, the Kelvin scale now relies on the Boltzmann constant, a fundamental constant in thermodynamics, and the definitions of the meter, kilogram, and second. This definition connects the Kelvin scale to the fundamental laws of thermal energy.

The standard units of measurement in the International System of Units (SI) for seven base quantities. All other SI units are derived from these seven base units.

The SI base unit for time, defined using the cesium-133 atom's vibrations.

The SI base unit for length, defined using the speed of light in a vacuum.

The SI base unit for mass, defined using Planck's constant, the meter, and the second.

The SI base unit for electric current, defined using the fundamental electric charge of an electron.

The SI base unit for thermodynamic temperature, defined using the Boltzmann constant.

The SI base unit for amount of substance, defined as the number of particles equal to 6.022 x 10^23.

The SI base unit for luminous intensity, defined as a specific type of light source.