Continuity Test Calculator
Enter measured resistance, lead resistance, reference threshold, and optional test current for a transparent continuity-test worksheet calculation.
- Corrected resistance
- ohm
- Threshold margin
- ohm
- Reference status
Calculation details
- Calculation basis
- Testing boundary
Recent results
Formulas
- Corrected resistance = measured resistance - lead resistance
- Threshold margin = reference threshold - corrected resistance
- Within reference when corrected resistance is less than or equal to the entered threshold
Use this calculator
Subtract entered lead resistance from a continuity test reading and compare the corrected value with a user-entered reference threshold.
Read the result
Review the calculated values with their displayed units and assumptions. The result is a planning aid for the stated inputs, not a final equipment or installation decision.
Check before final work
This continuity test worksheet estimate uses entered measurement and reference values. It does not establish an acceptance criterion, verify instrument calibration, prove bonding or grounding performance, or approve energized work.
FAQs
Why subtract lead resistance?
A two-wire measurement can include the resistance of the test leads. Subtracting the entered lead value creates a worksheet correction, but it does not remove every measurement error.
Does within reference mean the installation passes?
No. The status only compares the corrected arithmetic result with the threshold you enter. The applicable procedure, test method, equipment, calibration, and qualified review still control.