Convert kΩ to Ω, view resistance in Ω, kΩ, MΩ, mΩ, or µΩ, or calculate resistance from voltage and current with Ohm’s law and see the result.
Customize This Calculator
Build your own version. Describe what you want changed, added, or compared.
- All Unit Converters
- Ohms Law Calculator
- Watts to Ohms Calculator
- Ohms to Watts Calculator
- Ohms to Volts Calculator
- Henry to Ohms Calculator
- Farads to Ohms Calculator
- Inductance to Ohms Calculator
K to Ohms Formula
The calculator uses one of three formulas depending on the mode you select.
Mode 1: kΩ to Ω
Mode 2: Any ohm unit to ohms
Mode 3: From voltage and current (Ohm's Law)
Variables:
- R = resistance in ohms (Ω)
- R(kΩ) = resistance in kilo-ohms
- UnitFactor = multiplier for the chosen unit (GΩ = 1e9, MΩ = 1e6, kΩ = 1e3, Ω = 1, mΩ = 1e-3, µΩ = 1e-6)
- V = voltage in volts
- I = current in amperes
The kΩ to Ω mode multiplies your input by 1,000. The any-unit mode applies the matching SI factor and also reports the result in Ω, kΩ, MΩ, and mΩ. The V/I mode converts voltage and current to base units first, then divides.
Reference Tables
Use these tables to check conversions and read common resistor markings.
| Kilo-ohms (kΩ) | Ohms (Ω) | Mega-ohms (MΩ) |
|---|---|---|
| 0.1 | 100 | 0.0001 |
| 1 | 1,000 | 0.001 |
| 2.2 | 2,200 | 0.0022 |
| 4.7 | 4,700 | 0.0047 |
| 10 | 10,000 | 0.01 |
| 100 | 100,000 | 0.1 |
| 470 | 470,000 | 0.47 |
| 1,000 | 1,000,000 | 1 |
Resistors are sometimes printed with a letter that stands in for the decimal point. Here is how those markings translate.
| Marking | Meaning | Value in Ω |
|---|---|---|
| R47 | 0.47 Ω | 0.47 |
| 4R7 | 4.7 Ω | 4.7 |
| 470R | 470 Ω | 470 |
| 4K7 | 4.7 kΩ | 4,700 |
| 10K | 10 kΩ | 10,000 |
| 1M0 | 1.0 MΩ | 1,000,000 |
Examples and FAQ
Example 1. A resistor reads 4.7K. Convert to ohms.
R = 4.7 × 1000 = 4,700 Ω.
Example 2. A circuit drops 9 V across a resistor with 3 mA flowing through it. Find R in kΩ.
R = V / I = 9 / 0.003 = 3,000 Ω = 3 kΩ.
Is 1K the same as 1000 ohms? Yes. The K stands for kilo, meaning 1,000.
What does the K mean on a resistor? It marks the kilo-ohm position and replaces the decimal point. So 4K7 reads as 4.7 kΩ, or 4,700 Ω.
How do you convert kΩ to MΩ? Divide by 1,000. For example, 470 kΩ = 0.47 MΩ.
Why does the result switch to scientific notation sometimes? Very large or very small values are easier to read in exponential form. The calculator switches automatically above 1 GΩ or below 1 µΩ.
