Calculator Inputs and Outputs
Inputs
- R1 (Ω) — example: 100
- R2 (Ω) — example: 220
- R3 (Ω) — example: 150
Results
- Balanced unknown R4 (Ω)
- R2/R1 ratio
- Bridge product R2×R3 (Ω²)
Formula used
For a balanced bridge with R1/R2 = R3/R4, R4 = R2R3/R1.
How to Use the Wheatstone Bridge Calculator
Enter the requested values, check the units and assumptions, then select Calculate Wheatstone Bridge. The built-in defaults provide a complete working example.
Formula
For a balanced bridge with R1/R2 = R3/R4, R4 = R2R3/R1.
Understanding the Results
The primary answer appears first. Supporting outputs show related quantities, conversions, dates, costs, ratios, or intermediate values. Calculations keep additional precision before display rounding.
Accuracy Tips
- Use measured values and consistent units.
- Review assumptions, rates, timing, and efficiency inputs.
- Recalculate after changing any condition.
Important Note
This tool provides an informational estimate. Confirm critical financial, medical, construction, scientific, tax, legal, or safety decisions with an appropriately qualified professional.
Calculation Standards
This tool uses documented formulas and high-precision internal values. Displayed results may be rounded for readability. Review the assumptions and verify important decisions with a qualified professional.
Read our calculation methodology