Formula Explanation
1/Rtotal = 1/R1 + 1/R2 + 1/R3
This calculator applies the formula 1/Rtotal = 1/R1 + 1/R2 + 1/R3. Enter each value with the matching unit, and AZCalculate updates the result instantly.
Physics
Parallel Resistance Calculator
Use this parallel resistance calculator to calculate calculate total resistance for three resistors in parallel.
parallel resistanceresistorscircuit
Calculator
Calculate instantly
Calculator Inputs
Choose what you want to calculate, enter realistic values, adjust units where shown, and use the scenario section for repeated-use planning.
Input and Formula Breakdown
This calculator applies the formula 1/Rtotal = 1/R1 + 1/R2 + 1/R3. Enter each value with the matching unit, and AZCalculate updates the result instantly.
R1
100 ohm
R2
220 ohm
R3
330 ohm
Total resistance
56.9 ohm
Scenario and Comparison
Current
56.9 ohm
Projected
682.76
Adjusted
62.59
Visual Comparison
Current result56.9
Projected usage682.76
Comparison scenario62.59
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Use Cases
- Combine resistors
- Solve circuits
- Check total resistance
Step-by-Step Explanation
- Step 1Enter the known values in the calculator fields.
- Step 2Keep the units consistent with the labels shown beside each input.
- Step 3Apply the formula: 1/Rtotal = 1/R1 + 1/R2 + 1/R3.
- Step 4Review the primary result and supporting values.
Example calculation
Example parallel resistance calculator
Given
- R1: 100 ohm
- R2: 220 ohm
- R3: 330 ohm
Steps
- Use the values shown above.
- Apply 1/Rtotal = 1/R1 + 1/R2 + 1/R3.
Result
The calculator above shows the computed answer instantly from these example values.
Calculator guide
About this Parallel Resistance Calculator
Calculate total resistance for three resistors in parallel. This page includes an interactive calculator, concise formula notes, worked examples, FAQs, related calculators, and practical guidance you can revisit whenever needed.
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Calculator usage
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Most active date
2026-06-05
FAQ
Parallel Resistance Calculator FAQs
How does the parallel resistance calculator work?+
It uses 1/Rtotal = 1/R1 + 1/R2 + 1/R3 and calculates the result from the values you enter.
Can I copy or print the result?+
Yes. AZCalculate calculator pages include copy, share, and print actions.
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