Transformer AC to DC Calculator
This AC to DC calculator is for a circuit with a full wave bridge rectifier as shown above. If you had a transformer with known AC output voltage at the secondary, and you needed to know the DC voltage to expect after rectification, then this page will help. This is useful, if for example you are building a power supply for a project and you need to choose the correct transformer. Usually manufacturers state the transformer output voltage in AC (rms). When you pass this AC voltage through a bridge rectifier, it produces DC voltage, and it is useful to know what DC voltage to expect. For this calculator, we are using four diodes for the construction of the bridge rectifier, and it is important to know the forward voltage drop of the diode used. If you are not sure, then the default value of 0.7 V usually provides a good approximation.
In the default settings we can see that if the diodes had voltage drop of 0.7 V, and the secondary of the transformer produced 12 V AC, then the expected rectified DC output would be approximately 15.6 V DC.