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Calculate Your Energy Consumption
Discover how much power your devices consume and learn to optimize your energy usage with our smart calculator.
Energy Calculator
Calculation Results
Daily Consumption
0 kWh
Weekly Consumption
0 kWh
Monthly Cost
$0.00
Annual Cost
$0.00
Energy Saving Tips
Select a device to see personalized energy saving tips!
Enter device details and click calculate to see results
Common Device Examples
Laptop
~65W
Desktop
~200W
TV
~120W
Refrigerator
~150W
Resistor Color Code Calculator
Resistors use colored bands to indicate their resistance value and tolerance. Here's a guide to decode them:
4-Band Resistor Color Code Table
| Color | 1st Digit | 2nd Digit | Multiplier | Tolerance |
|---|---|---|---|---|
| Black | 0 | 0 | 1Ω | - |
| Brown | 1 | 1 | 10Ω | ±1% |
| Red | 2 | 2 | 100Ω | ±2% |
| Orange | 3 | 3 | 1kΩ | - |
| Yellow | 4 | 4 | 10kΩ | - |
| Green | 5 | 5 | 100kΩ | ±0.5% |
| Blue | 6 | 6 | 1MΩ | ±0.25% |
| Violet | 7 | 7 | 10MΩ | ±0.1% |
| Grey | 8 | 8 | 100MΩ | ±0.05% |
| White | 9 | 9 | 1GΩ | - |
| Gold | - | - | 0.1Ω | ±5% |
| Silver | - | - | 0.01Ω | ±10% |
How to Use the Table
Example: A resistor with bands [Yellow, Violet, Red, Gold]:
- Yellow (1st digit) = 4
- Violet (2nd digit) = 7
- Red (Multiplier) = 100Ω
- Gold (Tolerance) = ±5%
Calculation: 47 × 100Ω = 4700Ω (4.7kΩ) ±5%
Notes
- 5-band resistors include a third digit and higher precision.
- Military-spec resistors may use additional colors for tolerance.
