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Electrical converters

Circuits, fields and materials: from volts and amps to teslas, wire gauges and battery capacity.

33 converters

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Voltageyour figure against batteries and lightning
- kV → V
- V → kV
- mV → V
Currentyour figure against LEDs, kettles and lightning
- mA → A
- A → mA
- µA → mA
Current densitywires, windings and plating baths
- A/mm² → A/cm²
- A/cm² → A/mm²
- A/mm² → A/m²
Resistancethe current it would pass at mains voltage
- kΩ → Ω
- Ω → kΩ
- MΩ → kΩ
Conductancesiemens to ohms
- mS → Ω
- Ω → mS
- S → Ω
Resistivitythe resistance of a meter of thin wire
- Ω·m → Ω·cm
- Ω·cm → Ω·m
- Ω·m → µΩ·cm
Capacitanceyour value against real components
- µF → nF
- nF → µF
- nF → pF
Permittivitydielectric constant to velocity factor
- εr → F/m
- F/m → εr
- εr → pF/m
Inductanceyour value against real coils
- mH → µH
- µH → mH
- µH → nH
Magnetic permeabilityfrom water to mu-metal
- μr → H/m
- H/m → μr
- μr → μH/m
Electric chargeyour charge against batteries and lightning
- mAh → C
- C → mAh
- Ah → C
Surface charge densityfrom a balloon to an electrode
- µC/cm² → C/m²
- C/m² → µC/cm²
- µC/m² → nC/cm²
Conductivityyour water against rain, tap and sea
- µS/cm → mS/m
- mS/m → µS/cm
- mS/cm → S/m
Electric fieldyour field against a thunderstorm
- kV/m → V/m
- V/m → kV/m
- kV/cm → kV/m
Magnetic fieldyour field against the Earth and an MRI
- T → G
- G → T
- mT → G
Magnetic fluxyour flux against motors and MRI scanners
- mWb → Mx
- Mx → mWb
- Wb → Mx
Magnetomotive forceampere-turns and gilberts
- At → Gb
- Gb → At
- kAt → At
Wire gaugeyour wire against house and industrial cable
- AWG → mm²
- mm² → AWG
- AWG → mm
Battery capacityyour battery against phones, laptops and cars
- mAh → Wh
- Wh → mAh
- Ah → Wh
Antenna matchthe power bouncing back down the feeder
- SWR → dB
- dB → SWR
- SWR → %
Noise figurethe noise temperature behind it
- dB → K
- K → dB
- dB → F
Carrier mobilityhow fast carriers actually drift
- cm²/(V·s) → m²/(V·s)
- m²/(V·s) → cm²/(V·s)
- cm²/(V·s) → mm²/(V·s)
Magnetizing fieldthe flux density it makes in free space
- Oe → A/m
- A/m → Oe
- A/m → kA/m
Power factorthe apparent power your cable must carry
- cos φ → °
- ° → cos φ
- cos φ → tan φ
Apparent powerkVA, kW and power factor
- kVA → kW
- kW → kVA
- VA → W
Battery capacitythe energy density that gives
- mAh/g → C/kg
- C/kg → mAh/g
- mAh/g → C/g
Linear charge densityfrom DNA to a lightning leader
- nC/m → C/m
- C/m → nC/m
- µC/m → C/m
Resistor color codebrown black red is 1 kΩ
- bands → Ω
- Ω → bands
- bands (5) → Ω
Capacitor codes104 is 100 nF
- code → nF
- nF → code
- code → pF
Magnetic susceptibilityχ(SI) is 4π times χ(CGS)
- ppm (SI) → ppm (CGS)
- ppm (CGS) → ppm (SI)
- χ (SI) → χ (CGS)
Cable resistance per length1.588 Ω/1000 ft is 5.21 Ω/km
- Ω/1000 ft → Ω/km
- Ω/km → Ω/1000 ft
- Ω/m → Ω/ft
Cable capacitance per lengthRG-58 is 30.8 pF/ft
- pF/ft → pF/m
- pF/m → pF/ft
- nF/km → pF/ft
Three-phase power (kVA to amps)100 kVA at 400 V is 144 A
- kVA → A
- A → kVA
- MVA → A

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