Is this calculation free and private?

Yes, 100% of calculations execute locally in your web browser. No inputs or personal data are stored or transmitted.

What does the Resistor Color Code Value Calculator give me?

It works out Nominal Resistance, Resistance in Kilo-Ohms, Minimum Resistance with Tolerance and Maximum Resistance with Tolerance, updating live as you change the inputs.

What do I need to enter?

Just Band 1: 1st Digit, Band 2: 2nd Digit, Multiplier 10^x and Tolerance %. Every field has a sensible default you can start from.

Is my data uploaded anywhere?

No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.

Does it work on a phone?

Yes. The layout adapts to small screens and needs no app or signup.

Resistor Color Code Value Calculator

Decode standard 4-band resistor color codes into Ohms (Ω), kilo-Ohms (kΩ), and calculate minimum/maximum tolerance values.

100% free
Private in browser
No signup
No watermarks

Band 1: 1st Digit (0-9, e.g. 4=Yellow)

Band 2: 2nd Digit (0-9, e.g. 7=Violet)

Multiplier 10^x (e.g. 2=100 Red)

Tolerance % (e.g. 5=Gold, 10=Silver)

Nominal Resistance (Ohms Ω)

4,700

Resistance in Kilo-Ohms (kΩ)

4.7

Minimum Resistance with Tolerance (Ω)

4,465

Maximum Resistance with Tolerance (Ω)

4,935

Rate this tool

Be the first to rate — helps others and improves this page.

About Resistor Color Code Value Calculator

Decode standard 4-band resistor color codes into Ohms (Ω), kilo-Ohms (kΩ), and calculate minimum/maximum tolerance values. Enter Band 1: 1st Digit, Band 2: 2nd Digit and Multiplier 10^x and the tool works out Nominal Resistance, Resistance in Kilo-Ohms and Minimum Resistance with Tolerance straight away. Everything runs in your browser, so your data never leaves your device.

How to use Resistor Color Code Value Calculator

Enter Band 1: 1st Digit, Band 2: 2nd Digit and Multiplier 10^x.
Adjust the remaining options (Tolerance %) to match your case.
Read Nominal Resistance, Resistance in Kilo-Ohms and Minimum Resistance with Tolerance in the results panel — copy or download what you need.

Key features

Shows Nominal Resistance (Ohms Ω)
Shows Resistance in Kilo-Ohms (kΩ)
Shows Minimum Resistance with Tolerance (Ω)
4 adjustable inputs, results update as you type
No signup, no limits

Frequently asked questions

Is this calculation free and private?: Yes, 100% of calculations execute locally in your web browser. No inputs or personal data are stored or transmitted.
What does the Resistor Color Code Value Calculator give me?: It works out Nominal Resistance, Resistance in Kilo-Ohms, Minimum Resistance with Tolerance and Maximum Resistance with Tolerance, updating live as you change the inputs.
What do I need to enter?: Just Band 1: 1st Digit, Band 2: 2nd Digit, Multiplier 10^x and Tolerance %. Every field has a sensible default you can start from.
Is my data uploaded anywhere?: No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.
Does it work on a phone?: Yes. The layout adapts to small screens and needs no app or signup.

Related In-Depth Guides

Learn practical workflows, real-world examples, and expert tips in our comprehensive guides:

Security & DevOps · 5 min read