How to use the resistor tolerance range calculator
Find minimum and maximum resistance from value and tolerance. Enter nominal resistance, tolerance in the fields above; the minimum, maximum are computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- R — Nominal resistance (Ω)
- tol — Tolerance (%)
Worked example
With nominal resistance = 4700 Ω, tolerance = 5 %, the calculator gives minimum ≈ 4,465 Ω; maximum ≈ 4,935 Ω.
Frequently asked questions
What is the formula for the resistor tolerance range calculation?
Minimum (Ω) = R × (1-tol / 100). Maximum (Ω) = R × (1+tol / 100). Here R is nominal resistance (Ω), tol is tolerance (%).
What inputs do I need for the resistor tolerance range calculator?
You need nominal resistance in Ω, tolerance in %. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.