Electrical & Electronics Converters
Fifteen converters covering the fundamental electrical quantities: voltage, current, resistance, conductance, capacitance, inductance, charge, magnetic field, and magnetic flux.
All Electrical Converters
- Voltage ConverterV, mV, µV, kV, MV
- Current ConverterA, mA, µA, nA, kA
- Resistance ConverterΩ, mΩ, kΩ, MΩ
- Conductance ConverterS, mS, µS
- Capacitance ConverterF, mF, µF, nF, pF
- Inductance ConverterH, mH, µH, nH
- Electric Charge ConverterC, mAh, Ah
- Electric Field ConverterV/m, kV/m
- Resistivity ConverterΩ·m, Ω·cm
- Conductivity ConverterS/m, S/cm
- Electric Power ConverterW, kW, MW, hp(E)
- Battery Capacity ConvertermAh, Ah, Wh
- Magnetic Field ConverterT, mT, µT, G, mG
- Magnetic Flux ConverterWb, Mx
- Frequency & RPM Converterrpm ↔ Hz
About Electrical Units
Electrical engineering uses a compact set of fundamental units and a large collection of derived ones. The SI base unit of current is the ampere (A), defined since 2019 by fixing the elementary charge to exactly 1.602176634 × 10⁻¹⁹ C. From the ampere, the volt, ohm, farad, henry, coulomb, tesla, and weber all follow.
The key relationships
- 1 volt = 1 W/A = 1 J/C
- 1 ohm = 1 V/A
- 1 farad = 1 C/V
- 1 henry = 1 Wb/A = 1 V·s/A
- 1 coulomb = 1 A·s
- 1 watt = 1 V × 1 A
- 1 siemens = 1/ohm
- 1 weber = 1 V·s
- 1 tesla = 1 Wb/m²
Metric prefixes in electronics
Electronics relies heavily on metric prefixes. Common capacitor values range from picofarads (pF) to farads (F). Resistor values span milliohms (mΩ) to megohms (MΩ). The converter above handles all of these with exact prefix-based ratios (all powers of ten).
Battery capacity
Battery capacity is usually quoted in amp-hours (Ah) or milliamp-hours (mAh). One ampere-hour is the charge delivered by a current of 1 A for 1 hour, equal to 3600 coulombs exactly. To compare batteries of different voltages, you need watt-hours (Wh), where Wh = Ah × V.