Electricity

Cable Cross-Section Calculator

Calculate the required cable cross-section according to DIN VDE 0298-4 and DIN V...

15.187x used

Recommended

VDE Voltage Drop Calculator

Calculate voltage drop in electrical cables per DIN VDE 0100-520. Check whether ...

8.053x used

Recommended

Voltage drop / cable length

Calculate voltage drop in electrical cables. Essential for safe electrical insta...

7.930x used

Recommended

Cable dimensioning

Calculates minimum cross-section and maximum cable length taking into account th...

7.696x used

Electrical power

Calculates active, apparent and reactive power for single-phase and three-phase ...

5.228x used

Capacitor calculator

Calculate charge and energy of a capacitor for a given capacitance and voltage.

5.181x used

Calculate maximum cable length

Calculate the maximum cable length for a given voltage drop. For safe electrical...

4.856x used

Three-phase power calculator

Calculate three-phase power: active power, apparent power and current using P = ...

4.720x used

Resistance calculator

Calculates total resistance for series and parallel connection of up to 3 resist...

4.289x used

Inductance calculator

Calculates the magnetic energy and reactance of a coil for a given inductance, c...

4.110x used

Ohm's law

Ohm's law calculator: Calculate voltage, current, resistance and power. The basi...

3.690x used

Recommended

Grounding resistance calculator

Calculate grounding resistance for rod, ring and plate electrodes per IEC 60364.

2.414x used

Transformer calculator

Calculate transformer: turns ratio, currents, losses and core cross-section.

2.341x used

Circuit breaker calculator

Size circuit breakers (MCB): rated current, trip curve B/C/D and cable check to ...

2.285x used

Reactive power compensation

Calculate reactive power compensation: improve cos φ, capacitor sizing and curre...

2.062x used

Motor Calculator (Rated Current, Fusing, Supply Cable)

Calculate rated current, starting current, overload protection setting, back-up ...

1.958x used

Cable Ampacity Calculator (with Grouping Factors)

Calculate permissible current-carrying capacity Iz per IEC 60364-5-52 methodolog...

1.889x used

Short-Circuit Current Calculator (Loop Impedance)

Calculate the prospective fault current Ik from the measured loop impedance Zs a...

1.830x used

PV String Calculator (Inverter Sizing)

Size PV strings correctly: check open-circuit voltage at low temperature against...

1.798x used

Lighting Calculator (Lumen, Lux, Number of Luminaires)

How many luminaires does the room need? Calculate luminous flux demand and numbe...

1.541x used

EV Charger Calculator (Charging Time, Cable, Fusing)

Calculate EV charging time plus supply cable cross-section, fusing and RCD requi...

1.446x used

Motor Starting Current & Star-Delta

Rated and starting current of a three-phase motor, comparing direct-on-line with...

598x used

Protective Conductor (PE) Cross-Section Calculator

Calculate the minimum protective earth (PE) conductor cross-section from the lin...

566x used

PV Yield Calculator (kWp → kWh/year)

Technical PV annual yield from system size (kWp), specific yield, orientation an...

562x used

Battery Storage Sizing (PV Home Storage)

Technical sizing of a PV home battery: nominal capacity, usable capacity, charge...

533x used

Voltage Drop DC (12/24/48 V, PV)

Voltage drop for direct current across the outgoing and return conductor for low...

528x used

Minimum Cable Cross-Section for Short-Circuit (Adiabatic)

Calculate the thermally required minimum conductor cross-section during a short ...

464x used

Selectivity / Discrimination of Protective Devices

Estimate the selectivity (discrimination) of two series protective devices via t...

408x used

Cutoff Frequency Calculator (RC/RL)

Calculate the cutoff frequency of RC and RL filters: f_g = 1/(2πRC) or R/(2πL). ...

325x used

Calculate cable power loss

Calculate the power loss of a cable: P = I²·R with R = 2·L·ρ/A. Heat loss in wat...

312x used

Calculate battery life

Calculate battery and rechargeable battery life from capacity (mAh/Ah), current ...

284x used

Voltage Divider Calculator

Calculate a voltage divider: output voltage from input voltage and two resistors...

281x used

LED Series Resistor Calculator

Calculate the series resistor for LEDs from supply voltage, LED forward voltage ...

277x used