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Capacitor Charge: Charge magnitude Calculator

Capacitor Charge: Calculate charge magnitude from Capacitance, Voltage magnitude. Check the formula, input units and worked result on this page.

Enter your values

F
Formula symbol: C. Required unit: F. Must be greater than zero.
V
Formula symbol: U. Required unit: V. Must be greater than zero.

Use a decimal point, without thousands separators.

This model uses positive magnitudes. Use the plate-charge magnitude of a linear capacitor. Leakage, breakdown voltage and circuit transients are excluded.
Example result
Charge magnitude
0.00000675 C

The initial result uses the example values. Enter your own values and calculate again.

Edit inputs

How it works

Use capacitor charge with the units stated beside the fields. This form solves for charge magnitude; enter the known quantities in Capacitance, Voltage magnitude.

Inputs and units
Capacitor Charge: Charge magnitude Calculator · Inputs and units
InputExample valueWhat to enter
Capacitance0.0000015 FFormula symbol: C. Required unit: F. Must be greater than zero.
Voltage magnitude4.5 VFormula symbol: U. Required unit: V. Must be greater than zero.
q = (1 × C × U)

Worked example

Show example inputs and results

This example is generated by the same calculation engine using the starting values in the form. Your own inputs produce your own result.

Capacitance
0.0000015 F
Voltage magnitude
4.5 V

Complete example results

Charge magnitude
0.00000675 C

Reading the result

The result solves for charge magnitude from the entered quantities. Check the result unit and the formula conditions before using it.

Questions and answers

Can I use the example values for my own calculation?

The example values illustrate the calculation. Replace every input with your own information, especially dates, rates and the selected operation.

When can I use the charge magnitude result?

This model uses positive magnitudes. Use the plate-charge magnitude of a linear capacitor. Leakage, breakdown voltage and circuit transients are excluded.

Why are some results rounded?

Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.

Are my inputs sent to a server?

The calculator processes inputs in your browser. Its code does not send your values to a server.

Method sources: openstax.org

Methods & accuracy

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