Leistungsberechnung Gleichstrom

⚡ Direct Current (DC) Calculations

Direct Current (DC) is the foundation of many electrical applications. Whether in battery systems, solar technology, or electronic devices – with our DC calculators, you can quickly and precisely calculate all important electrical quantities.

Available Calculations:

Active Power: P = U × I

Calculate electrical power in DC applications

Active Power: P = I² × R

Power calculation via current and resistance

Active Power: P = U² / R

Power calculation via voltage and resistance

Mechanical Power: P = W / t

Calculate mechanical work and power

What is Direct Current?

Direct current refers to a current direction that remains constant and does not alternate. Unlike alternating current, the current always flows in the same direction. Typical applications include batteries, rechargeable batteries, solar cells, and electronic circuits. The calculation of voltage, current, resistance, and power in DC systems follows Ohm's Law and fundamental electrical formulas.

DC Power Calculation
P = U × I

Calculate the supplied electrical power, voltage and current of, for example, DC motors.

P = U × I

💡 Enter the known values – leave the field you want to calculate empty.

✅ Result:

Example Calculation:
A 24 Volt DC motor has a rated current of 33.5 Ampere. What electrical power results from these values?
P = U × I
P = 24 V × 33.33 A
P = 0.8 kW or 800 W

Units of Measurement:
Power P = Kilowatt [kW]
Voltage U = Volt [V]
Current I = Ampere [A]

DC Power Calculation
P = I² × R

Calculate the electrical power, current or resistance.

P = I² × R

💡 Enter the known values – leave the field you want to calculate empty.

✅ Result:

Example Calculation:
A DC motor has a rated current of 25 Ampere and a resistance of 4.8 Ohm. What electrical power results from these values?
P = I² × R
P = (25 A)² × 4.8 Ω
P = 3 kW

Units of Measurement:
Power P = Kilowatt [kW]
Current I = Ampere [A]
Resistance R = Ohm [Ω]

DC Power Calculation
P = U² / R

Calculate the power, voltage or resistance.

P = U² / R

💡 Enter the known values – leave the field you want to calculate empty.

✅ Result:

Example Calculation:
A 24 Volt DC motor has a resistance of 4.8 Ohm. What electrical power results from these values?
P = U² / R
P = (24 V)² / 4.8 Ω
P = 0.12 kW or 120 W

Units of Measurement:
Power P = Kilowatt [kW]
Voltage U = Volt [V]
Resistance R = Ohm [Ω]

Mechanical Power Calculation
P = W / t

Calculate the mechanical power, work or time.

P = W / t

💡 Enter the known values – leave the field you want to calculate empty.

✅ Result:

Example Calculation:
A DC motor performs 4500 Joule of electrical work within 30 seconds. What electrical power results from these values?
P = W / t
P = 4500 J / 30 s
P = 0.15 kW or 150 W

Units of Measurement:
Power P = Kilowatt [kW]
Work W = Joule [J]
Time t = Seconds [s]

Formeln für Gleichstrom

  • P = U × I – Leistung aus Spannung und Strom
  • P = I² × R – Leistung aus Strom und Widerstand
  • P = U² / R – Leistung aus Spannung und Widerstand
  • P = W / t – Leistung aus Arbeit und Zeit

P ist die Leistung in Kilowatt (1 kW = 1000 W), U die Spannung in Volt, I der Strom in Ampere, R der Widerstand in Ohm, W die Arbeit in Joule und t die Zeit in Sekunden. In jedem Rechner lässt sich jede der Größen aus den übrigen berechnen.

Elektrische Leistung

Die elektrische Leistung gibt an, wie viel elektrische Arbeit der Strom in jeder Sekunde verrichtet – also wie viel elektrische Energie in andere Energieformen umgewandelt wird. Die Einheit Watt (W) ist nach dem schottischen Techniker James Watt benannt.

Rechenbeispiel P = I² × R

Ein Gleichstrommotor hat einen Nennstrom von 25 A und einen Widerstand von 4,8 Ω.

P = (25 A)² × 4,8 Ω
P = 3000 W = 3 kW