Calculator: Basic Electrotechnical Calculations

Please note that although the following calculators have been carefully tested, we assume no guarantee for correct results.

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Electric power

Voltage (V)
Amperage (I)
Power (P)

This calculator uses the voltage (direct current) and amperage to calculate the electric power.

Amperage

Voltage (V)
Power (P)
Amperage (I)

This electricity calculator uses the voltage (direct current) and electric power to calculate the current strength.

Voltage

Amperage (I)
Power (P)
Voltage (V)

This calculator uses the amperage and electric power to calculate the voltage (direct current).

The formula sign for the voltage is U (Latin urgere) which is used in German speaking regions, but in English speaking regions V (English voltage) is used, and the unit is volt (V). The amperage is internationally designated with the formula sign I (Intensity), and its unit is the ampere (A). P stands for power, and its unit is watt (W).

The calculation basis for this electricity calculator:
The formula ("power formula") this is based on is P=I*V, and its applies for direct current.
The 2nd decimal point in the result is rounded upwards.

Electrical work (energy)

Power (P)
Time (t)
Energy (W)

This calculator uses the power and the duration of current consumption to calculate the resulting electrical work.

The electrical work (W for English Work) is calculated as the product of electric power (P) and time (t). It is indicated in watt seconds (Ws) or joules (J) (1 J = 1 Ws).

Calculation basis for this energy calculator:
The formula this is based on is W=P*t, respectively W=I*V*t.
The 2nd decimal point is rounded up in the result.

Electric current density
depending on the conductor's cross-sectional area.

Amperage
Cross section
Current density

This calculator uses the amperage and the cross-sectional area of the conductor to calculate the resulting electric current density.

Electric current density
depending on the conductor diameter.

Amperage
Diameter
Current density

This calculator uses the amperage and the diameter of conductors with circular cross sections (wire) to calculate the resulting electric current density.

The electric current density (formula sign J) indicates the amperage (I) per area (conductor cross-section A). The heating up of a conductor when electricity passes through it depends on the current density.

Calculation basis for this current density calculator:
The formula this is based on is J=I/A.
The 2nd decimal point is rounded up in the result.

Error messages

Overflow appears when the value to be displayed is too large for the display field. The other displayed values remain valid.

NaN (Not a Number) appears when an invalid number was entered in one of the input fields, most commonly an entry containing an incorrect decimal character (e.g. point and not comma), a letter or a thousands separator.

	See also:
		Accumulator lexicon Converters & calculators: overview Units converter Calculators: resistance calculations Calculators: charge/capacity Calculators: series connection of resistors Calculators: parallel connection of resistors Calculators for your website - free of charge

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