Ohm to kOhm Converter & Color Code Decoder
Convert resistance values between Ohms and kiloOhms immediately. Includes resistor color code visualization and scientific notation support for electronics.
About
Electronics prototyping requires frequent translation between unit prefixes. Schematics often label resistors in kiloOhms using shorthand notation like "4k7" or "10k", while multimeters and bills of materials may specify values in raw Ohms. Mismatched units lead to order-of-magnitude errors in voltage dividers and current limiters. Precision is vital. A 100 Ohm resistor used in place of a 100 kOhm resistor results in excessive current flow and component destruction. This tool standardizes these values and provides visual validation via color codes.
Formulas
The relationship uses standard SI prefixes. The kilo prefix denotes a multiplier of 103.
When calculating color codes, the value is broken into significant digits and a multiplier:
Reference Data
| Resistance (Ω) | Resistance (kΩ) | Standard Series (E12) | Color Code (4-Band) |
|---|---|---|---|
| 10 | 0.01 | Yes | Brown, Black, Black, Gold |
| 100 | 0.1 | Yes | Brown, Black, Brown, Gold |
| 220 | 0.22 | Yes | Red, Red, Brown, Gold |
| 330 | 0.33 | Yes | Orange, Orange, Brown, Gold |
| 1,000 | 1 | Yes | Brown, Black, Red, Gold |
| 2,200 | 2.2 | Yes | Red, Red, Red, Gold |
| 4,700 | 4.7 | Yes | Yellow, Violet, Red, Gold |
| 10,000 | 10 | Yes | Brown, Black, Orange, Gold |
| 47,000 | 47 | Yes | Yellow, Violet, Orange, Gold |
| 100,000 | 100 | Yes | Brown, Black, Yellow, Gold |
| 470,000 | 470 | Yes | Yellow, Violet, Yellow, Gold |
| 1,000,000 | 1,000 | Yes | Brown, Black, Green, Gold |