calctricFrom input to answer.
- Open All Tools → Electrical Math.
- Choose DC, 1-phase AC or 3-phase AC.
- In DC, enter two independent values from voltage, current, resistance and power. In AC, enter the known electrical values and power factor as required.
- Read the fields marked Calculated. Editing a calculated field makes that value an input and updates the other results.
WORKED EXAMPLE
A 24 V DC load
Enter
Select DC. Enter 24 V and 2 A.
Read the result
Resistance is 24 ÷ 2 = 12 Ω. Real power is 24 × 2 = 48 W.
Get more from it.
- In balanced three-phase mode, use line-to-line voltage and line current.
- A power factor of 0.8 is entered as 80% when the field is labelled percent.
- The calculator keeps the latest independent entries. If an answer changes unexpectedly, check which fields say Entered and Calculated.
Know the limits.
- AC relationships assume the selected phase configuration; three-phase calculations assume a balanced load.
- This does not choose wire, protection or motor starting equipment. AC mode is not a DC resistance calculation.
Verify the inputs, applicable local requirements and real conditions. The app is a calculation aid and can contain errors. See our terms and safety disclaimer.
Common questions.
Where are the “I know” menus?
The current interface uses direct entry. Type into the quantity you know and read the calculated fields.