Resistor Value Calculator
Resistance from band values and tolerance.
Enter your values
ⓘ Live results
Results
- Resistance
- 47 kΩ
- Tolerance range
- 44650 – 49350 Ω
- Exact value
- 47,000 Ω
- Tolerance
- 5%
Quick answer
Resistor value is the significant digits multiplied by the multiplier band.
R = digits × 10^multiplier
How to use the Resistor Value Calculator
- 1Enter the first two band digits.
- 2Enter the multiplier band as a power of ten.
- 3Set the tolerance band percentage.
Worked example
Using the values the calculator loads with:
Inputs
- First digit4
- Second digit7
- Multiplier power3
- Tolerance5 %
Results
- Resistance47 kΩ
- Tolerance range44650 – 49350 Ω
- Exact value47,000 Ω
- Tolerance5%
Frequently asked questions
What colour is multiplier 3?
Orange — 4, 7, orange gives 47 kΩ.
Why does tolerance matter?
In timing and divider circuits a 5% part can shift behaviour noticeably.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.