Noise temperature to noise figure
Type a value in K to get it in dB instantly.
0.01495dB
Nothing on our list is smaller: a cryogenic amplifier is 1.02× noisier. That is an equivalent noise temperature of about 1 K.
Convert the other way: dB to K
What it means
How quiet is that receiver?
Everything here is referred to 290 K, the standard reference temperature. A receiver pointed at cold sky sees far less noise than one pointed at the ground.
The math
How to convert K to dB
Noise figure and temperature are two readings of the same thing: T = 290 × (10^(NF ÷ 10) − 1), and back again NF = 10 × log₁₀(1 + T ÷ 290).
Example: 1 K = 0.0149499 dB.
Every unit
Your noise in every unit
Tables
K to dB conversion table
| K | dB |
|---|---|
| 0.1 K | 0.00149731 dB |
| 0.3 K | 0.00449038 dB |
| 0.5 K | 0.00748139 dB |
| 1 K | 0.0149499 dB |
| 1.5 K | 0.0224056 dB |
| 2 K | 0.0298485 dB |
| 3 K | 0.0446962 dB |
| 5 K | 0.0742402 dB |
| 7 K | 0.103585 dB |
| 10 K | 0.147233 dB |
| 15 K | 0.219018 dB |
dB to K conversion table
| dB | K |
|---|---|
| 0.1 dB | 6.75497 K |
| 0.3 dB | 20.7406 K |
| 0.5 dB | 35.3854 K |
| 1 dB | 75.0884 K |
| 1.5 dB | 119.636 K |
| 2 dB | 169.619 K |
| 3 dB | 288.626 K |
| 5 dB | 627.061 K |
| 7 dB | 1,163.44 K |
| 10 dB | 2,610 K |
| 15 dB | 8,880.61 K |
Quick answers
Quick answers
- How many dB is 1 K?
- 1 K is 0.0149499 dB.
- How many dB is 10 K?
- 10 K is 0.147233 dB.
The units
About these units
Noise temperature (K)
The temperature a resistor would need to make that much noise.
Noise figure (dB)
How many decibels of signal-to-noise the stage costs you.
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