Electric current units

ampere (A)↔miliampere (mA)↔microampere (uA)↔nanoampere (nA)↔etc.

Converts electric current from one unit to another e.g. from miliamperes (mA) to amperes (A) or vice versa.

Electric resistivity units

over 170 resistivity units↔ohm times metre↔ohm times inch↔statohm per metre↔etc.

More than 170 restivity units. Here you found common units such as ohm times metre (Ω × m) or ohm times inch (Ω × inch), but also less known for example statohm times inch (statohm × inch).

Electrical capacitance units

farad↔milifarad↔mikrofarad↔nanofarad↔picofarad↔EMU↔ESU↔etc.

Converts electrical capacitance value from one unit to another e.g. from farads (F) to microfarads (µF) 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.

Frequency generator

sine↔square↔sawtooth↔triangle↔etc.

Generates sound with specified frequency and waveform type (sine, triangle etc.).

Frequency units

25+ frequency units↔Hz↔KHz↔MHz↔GHz↔radians per second↔RPM↔etc.

More than 25 frequency units. Common SI units such as hertz (Hz), kilohertz (kHz), gigahertz (GHz), but also some less known like radians per seconds, RPM (rotatinions per minute) or degrees per hours.

Materials resistivity

resistivity↔ohm × metre↔copper↔gold↔silver↔mercury↔etc.

Table shows resistivity values of common materials (substances).

Morse alphabet

Morse codes↔letters↔digits↔SOS↔amateur radio↔etc.

Table shows common Morse codes for letters, digits and selected special codes such as international SOS signal.

Morse code translator

Morse codes↔encoder↔decoder↔translator

Calculator encodes given text message into Morse codes or vice versa. You can also hear (beeps) and see (as sequence of light pulses) your Morse encoded message. For better readability currently played Morse character is highlighted (marked).

Ohm law

I=U/R↔current↔voltage↔resistance

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)

Periodic signals

sine↔triangle↔square↔mean value↔shape factor↔effective value↔etc.

Table shows properties of common periodic signals (sine, square, triangle etc.) such as absolute mean value, effective value or shape factor.

Resistance units

ohm (Ω)↔kiloohm (kΩ)↔megaohm (MΩ)↔gigaohm (GΩ)↔etc.

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.

Voltage units

electric potential↔volt (V)↔kilovolt (kV)↔megavolt (MV)↔milivolt (mV)↔etc.

Converts voltage from one unit to another e.g. from milivolts (mV) to volts (V) or vice versa.

Wire of a given length resistance

wire length↔cross-surface area↔material resistivity↔wire resistance

Calculator shows relation between wire dimensions (length, cross-surface area), kind of material (resistivity) and resistance of the final conductor.