Resistor Color Code Calculator
Decode 4-band resistor color codes. Select band colors to calculate resistance value, tolerance, and acceptable range.
How to Use the Resistor Color Code Calculator
- Enter the known physical values in the corresponding fields.
- Select the appropriate units if multiple options are available.
- The unknown value is computed instantly from the formula.
- Review the result and the formula explanation below.
Referência Rápida
| De | Para |
|---|---|
| Speed of light | 299,792,458 m/s |
| Gravity (g) | 9.807 m/s² |
| Avogadro's number | 6.022 × 10²³ |
| Boltzmann const. | 1.38 × 10⁻²³ J/K |
| Elementary charge | 1.602 × 10⁻¹⁹ C |
| Planck's const. | 6.626 × 10⁻³⁴ J·s |
Casos de Uso
- •Solving physics homework or exam problems with the correct formula.
- •Verifying experimental measurements and calculations in the lab.
- •Understanding physical relationships between quantities.
- •Quick engineering calculations for design or estimation.
Fórmula
Resistance = (Band1 × 10 + Band2) × Multiplier ± Tolerance%.
Perguntas Frequentes
How to use?
Enter the data and click the calculate button.
How do resistor color codes work?
The first two bands represent digits, the third is a multiplier, and the fourth indicates tolerance. Colors map to digits 0-9.
What does tolerance mean?
Tolerance indicates the acceptable range of the actual resistance from the stated value. A 100Ω ±5% resistor can be 95Ω to 105Ω.
Is it free?
Yes, all calculators are completely free.