Calculators: Capacity and Charges (Accumulators)

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

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Capacity

Amperage
Time
Capacity

This capacity calculator for batteries uses the current strength and the duration of current consumption to calculate the resulting capacity.

Current strength

Capacity
Time
Amperage

This battery calculator uses available capacity and duration of current consumption to calculate the resulting voltage.

Time (discharge time)
depending on current strength

Capacity
Amperage
Resid. capacity		%
Time

This accumulator calculator uses the available capacity and the current strength to calculate the resulting duration of the current consumption. This enables a residual capacity that is to remain in the battery to be shown as a percentage.

Time (discharge time)
depending on the power

Capacity
Voltage
Power
Resid. capacity		%
Time

This accumulator calculator uses the available capacity, the accumulator-voltage and the discharged power to calculate the resulting duration of the current consumption. This enables a residual capacity that is to remain in the battery to be shown as a percentage.

Time (discharge time)
abhängig vom Lastwiderstand

Capacity
Voltage
Resistance
Resid. capacity		%
Time

This accumulator calculator uses the available capacity and the resistance of the consumer to calculate the resulting duration of the current consumption. This enables a residual capacity that is to remain in the battery to be shown as a percentage.

The amount of electricity in batteries is usually specified as electrical charge capacity. Its formula sign is Q, and the commonly used units for this are the ampere hour (Ah) or the ampere second (3600 As = 1 Ah), respectively the coulomb (1 C = 1 As). However, the data specified on accumulators, respectively data sheets of batteries, refers to the respective tests conditions used (e.g. temperature, discharge current, final discharge voltage, battery age etc.), i.e. the validity of the specifications for other measuring conditions is limited.

Calculation basis for the above capacity calculator:
The formula this is based on is Q=I*t.
The 2nd decimal point in the result is rounded up.

Efficiency (ampere hours)

Discharge cap.
Charging cap.
Efficiency		η_Ah

This efficiency calculator for storage batteries uses the discharge capacity and the charging capacity for calculating the resulting efficiency η (Eta).

The efficiency η (Eta) of this calculator shows the ratio between the charging and discharging amounts of electricity. The difference between the two values is primarily due to heat losses.

The calculation basis for this efficiency calculator:
The formula it is based on is efficiency η=Q/QL.
The 2nd decimal point in the result is rounded up.

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:
		Glossary overview Converters & calculators: overview Units converter Calculators: basic electrotechnical calculations Calculators: resistance calculations Calculators: series connection of resistors Calculators: parallel connection of resistors Calculators for your website - free of charge

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