This is a tool that calculates the voltage, current or resistance using Ohm's Law.

The tool is multi-directional and, therefore, determines the information that needs to be calculated based on which data has been entered. In other words, if two out of the resistance, current or voltage are entered, the tool calculates the remaining one. When further data changes are made, the tool re-calculates the same Ohm's Law factor unless that factor is itself changed or a different data field is cleared.

In more detail, the information that can be entered and/or calculated is:

• The resistance. This does not need to be in any specific unit but the unit should be consistent with the units of current and voltage, e.g. ohms, amps and volts.
• The current. This does not need to be in any specific unit but the unit should be consistent with the units of resistance and voltage, e.g. milliamps, kilohms and volts.
• The voltage. This does not need to be in any specific unit but the unit should be consistent with the units of resistance and current (see above).

Associated tool link: http://www.coggit.com/tools/ohms_law_calculator.html