Noise factor to noise figure
Type a value in F to get it in dB instantly.
0dB
Nothing on our list is smaller: a cryogenic amplifier is 1.02× noisier. That is an equivalent noise temperature of about 0 K.
Convert the other way: dB to F
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 F 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 F = 0 dB.
Every unit
Your noise in every unit
Tables
F to dB conversion table
| F | dB |
|---|---|
| 1.02 F | 0.0860017 dB |
| 1.07 F | 0.293838 dB |
| 1.12 F | 0.49218 dB |
| 1.26 F | 1.00371 dB |
| 1.41 F | 1.49219 dB |
| 1.58 F | 1.98657 dB |
| 2 F | 3.0103 dB |
| 3.16 F | 4.99687 dB |
| 5.01 F | 6.99838 dB |
| 10 F | 10 dB |
| 31.6 F | 14.9969 dB |
dB to F conversion table
| dB | F |
|---|---|
| 0.1 dB | 1.02329 F |
| 0.3 dB | 1.07152 F |
| 0.5 dB | 1.12202 F |
| 1 dB | 1.25893 F |
| 1.5 dB | 1.41254 F |
| 2 dB | 1.58489 F |
| 3 dB | 1.99526 F |
| 5 dB | 3.16228 F |
| 7 dB | 5.01187 F |
| 10 dB | 10 F |
| 15 dB | 31.6228 F |
Quick answers
Quick answers
- How many dB is 1 F?
- 1 F is 0 dB.
- How many dB is 10 F?
- 10 F is 10 dB.
The units
About these units
Noise factor (F)
The linear ratio behind the decibels.
Noise figure (dB)
How many decibels of signal-to-noise the stage costs you.
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