Amps to Volts Calculator

Find voltage from amps using resistance or power. Handle DC, AC, and quick comparison cases. Use clean inputs, exports, formulas, and examples with confidence.

Calculator

Example Data Table

Method Current Resistance Power PF Voltage Output
Current and Resistance 5 A 24 Ω 120 W Not used 120 V
Power and Current 15 A Not used 1800 W Not used 120 V
Single-Phase AC 10 A Not used 2300 W 1.00 230 V
Three-Phase AC 25 A Not used 15000 W 0.80 433.01 V

Formula Used

1) Current and Resistance

V = I × R
Use this when circuit current and resistance are known.

2) Power and Current

V = P ÷ I
Use this when electrical power and current are available.

3) Single-Phase AC

V = P ÷ (I × PF)
Use this for real power in single-phase systems.

4) Three-Phase AC

V = P ÷ (√3 × I × PF)
Returns balanced line-to-line voltage in three-phase circuits.

All inputs are converted into base units before calculation. That keeps the result consistent across A, mA, kA, W, kW, MW, Ω, kΩ, and MΩ selections.

How to Use This Calculator

  1. Choose the method that matches your circuit data.
  2. Enter current and select the correct current unit.
  3. Provide resistance, power, or power factor when required.
  4. Click Calculate Voltage to show the result above the form.
  5. Review the working steps, converted values, and output voltage.
  6. Use the CSV or PDF buttons to save the generated result.

FAQs

1) Can amps be converted to volts directly?

Not by current alone. You also need resistance, power, or circuit power factor. Voltage depends on the relationship between current and other electrical values.

2) Which formula should I use?

Use V = I × R when resistance is known. Use V = P ÷ I for DC power cases. Use the AC formulas when power factor affects the circuit.

3) What is power factor in this calculator?

Power factor is the ratio between real power and apparent power. It matters in AC systems because it changes the voltage estimate for the same current and power.

4) Does the three-phase result show phase voltage?

No. The three-phase formula here returns balanced line-to-line voltage. That is the most common requirement for practical three-phase electrical calculations.

5) Can I enter mA, kA, kW, or kΩ values?

Yes. The calculator converts selected units into base units automatically. That helps you work with small electronics and larger industrial systems on one page.

6) Why is my result not showing?

A required value may be missing or zero. Check current first, then confirm the selected method has all needed fields filled correctly.

7) What does the CSV export contain?

The CSV file stores the method, formula, converted inputs, voltage output, working line, and note. It is useful for project records and quick spreadsheet review.

8) Is this suitable for real design work?

It is suitable for estimation and verification. Final design decisions should also consider system standards, temperature effects, harmonics, cable losses, and safety margins.

Related Calculators

power unit converterw to kw converterkw to w convertersingle phase convertermw to kw converterpower factor convertercurrent converterhz to rpm converterkv to v converterkwh to wh converter

Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.