Converts amount of substance from one unit to another e.g. from milimoles (mmol) to number of particles (atoms or molecules depending on substance) or vice versa.
Table shows example usage of selected radioisotopes.
Calculations related to Avogadro's law. Enter known values (e.g. volume or number of moles) and select which value you want to find out (e.g. molar volume) and we'll show you step-by-step how to transform basic formula and reach your result in desired units.
Table shows common constants used in physics and chemistry.
Calculator finds out boiling point under selected pressure using Clausius-Clapeyron's equation and reference data for given substance. For example, you can find out what is water's boiling point in high mountains, where the pressure is lower.
Calculations related to Clapeyron's equation known also as ideal gas law. Enter known values (e.g. pressure and temperature) and select which value you want to find out (e.g. volume) and we'll show you step-by-step how to transform basic formula and reach your result in desired units.
Table shows critical temperatures of various chemical substances.
Table shows lattice crystal energy in kJ/mol for selected ion compounds.
Density units converter - converts units between kilograms per cubic meter, grams per liter, ounces per galon etc. Both metric and imperial (US and UK) units are included. Also, you will find more exotic units here, such as multiplicity of Earth density or femtograms per liter.
Table shows density of selected gases, solids and liquids.
Converts dimensionless quantity units such as percent, permile, ppm (parts per milion) mU (miliuno) etc.
Converts dipole moment from one unit to another e.g. from debyes to atomic units or vice versa.
Table shows values of electric dipole moment of various chemical substances given in any unit you prefer such as debyes, coulomb times meter, atomic units of dipole moment etc.
Converts electric current from one unit to another e.g. from miliamperes (mA) to amperes (A) or vice versa.
Table shows common classification of electromagnetic waves based on frequency (wavelength). Also, example methods of producing/generating and applications for given wavelengths are presented.
Table shows electron configuration of chemical elements in groundstate.
Table shows basic properties of elementary particles.
Energy units converter. Converts joules, calories, many physical, british, american and time related units.
More than 25 frequency units. Here you found here common SI units such as hertzs (Hz), kilohertz (kHz), gigahertz (GHz), but also some less known like radians per seconds, RPM (rotatinions per minute) or degrees per hours.
Generates sound with specified frequency and waveform type (sine, triangle etc.).
Table shows basic physical properties of our Galaxy i.e. Milky Way. Presented data are for example diameter, mass, mean density etc. but also less common like distance of the Sun from the center of the Galaxy.
Table shows small and big greek letters with their example usage in various kind of science such as mathematics, physics or chemistry. Additionally, it shows how to get a given greek letter in the HTML code (so-called HTML entities), TeX and TeX based formats such as LaTeX, KaTeX, MathJax etc. or in the UNICODE system.
Table shows ionization energy of chemical elements given in kJ/mol.
Length units converter - converts units between kilometers, meters, decimeters, angstroms, miles, feet, inches, american/imperial units, nautical (sea) units and astronomical units
Mass (weight) units converter - converts units between metric (tons, kilograms, etc.), Avoirdupois/US (pounds, ounces) and troy systems
Tables display the volume that one mole of the selected gas occupies.
Online calculator for momentum. Computes values of momentum, mass or velocity using the momentum formula.
Table shows common physical properties of the moon such as mean radius, distance from the Earth (average, minimum and maximum), mean density, volume etc.
Table shows all known, natural satellites (i.e. moons) of the planets in Solar System including some common characteristics such as mean radius, semi-major axis, sidereal period or discovery year.
Table shows frequencies of music notes in twelve-tone equal tempered system (12-TET). Both basic tone and up to three harmonic frequencies are presented.
A metric units prefixes for numbers (SI prefixes).
Current, voltage, resistance: calculations related to Ohm law. Enter known values (e.g. voltage and resistance of conductor) and we'll show you step-by-step how to transform basic formula and find out missing value (e.g. current)
Table shows properties of common periodic signals (sine, square, triangle etc.) such as absolute mean value, effective value or shape factor.
Power units converter. This calculator converts between horsepower, wats and over a dozen other power units.
Pressure units converter. Easy conversion of pascals, atmosfpheres, bars and other pressure related units.
Converts electrical resistance value from one unit to another e.g. from ohms (Ω) to megaoms (MΩ) or vice versa.
Calculator decodes parameters of the resistor (resistance value, tolerance, temperature coefficient) painted as colored bands on the resistor and vice versa.
Table shows most common properties of Solar System planets collected into one set of data.
Specific heat capacity units converter - converts units based on various energy units (joules, calories, kilocalories), temperature units (Kelvins, Celsius or Fahrenheit degrees) and mass units (grams, kilograms).
Table shows specific heat capacity of selected gases, solids and liquids.
Speed (velocity) units converter - converts units between metric (kilometres per hour, meters per second and many more), british-american (miles per hour, foot per second and many more), nautical (knots) and some other (machs, speed of light etc.)
Table shows isotopic composition of chemical elements occuring permanently in nature. Isotopes obtained artificially are not presented here.
Temperature units converter. Easy conversion of Kelvin, Celsius, Fahrenheit, Rankine and other temperature related (heat) units.
Tables show triple points (temperature and pressure) of selected substances i.e. conditions when all three phases (liquid, solid and gas) coexist in thermodynamic equilibrium.
Table shows various units (kilogram, metre, ampere etc.) and corresponding physical quantities (measurements). Both basic SI and selected derivated units are presented.
Online calculator for velocity. Computes values of velocity, distance or time using the average velocity formula.
Converts voltage from one unit to another e.g. from milivolts (mV) to volts (V) or vice versa.
Converter of volume units (also capacity units). Supports 110+ different units used over the world. Gallons, litres, cubic meters, pints, barrels and 100+ other !
Convert volume to mass and vice versa. Using this calculator you can check what is the weight of a glass of water or what volume does kilogram of feathers occupy. Use the one of predefined substances (water, steal, wood etc.) or enter custom density in any unit (kg/m3, g/cm3, mg/l etc.)
Table shows how density of water depends on temperature. Data were measured under so-called normal pressure i.e. 1013,25 hPa.
The calculator finds out wavelength based on frequency and vice versa. It accepts wave velocity as input, so you can use it for various kinds of waves (sound, light etc.).