# 8 Best Free Online Noise Figure Calculator Websites

Here is a list of **best free online Noise Figure Calculator websites**. The Noise Figure indicates the amount of degradation that occurred in the signal-to-noise ratio due to a device. In an electrical system, various electrical components (amplifiers, mixers, ) introduce noise to signals. The noise can be introduced by various reasons like *shot noise, flicker, thermal effects,* etc. To calculate the amount of noise figure in electrical components, users need these noise figure calculator websites.

Using these websites, users can calculate the total Noise Figure of multiple cascade stages of components. To do that calculation, users need to enter the Noise and Gain values of each cascaded component. Apart from Noise figures, some of these websites can also calculate the total gain using the same set of input values. Some websites also show the calculation steps and formulas that they use to perform the calculation. After performing the calculation, users can view and copy the final results. To help new users, I have also included the necessary calculation steps in the description of each website.

On these websites, users also get additional tools such as **Channel Capacity Calculator, Parabolic Dish Antenna, ADC Alias Calculator, Coax Impedance Calculator,** etc. Go through the list to know more about these websites.

### My Favorite Online Noise Figure Calculator Website:

**everythingrf** is my favorite website as it can calculate both noise figure and total gain on an n-stage circuit. Plus, it also shows the formula that it uses to calculate the noise figure.

You can also check out lists of best free Online Image Distortion, Online Battery Life Calculator, and Online CAA Record Generator websites.

### Comparison Table:

Features/Website Names | Shows noise figure diagram | Shows Calculation Formula | Provides calculation steps or examples |
---|---|---|---|

everythingrf | ✓ | ✓ | ✓ |

pasternack.com | ✓ | ✓ | x |

omnicalculator.com | x | ✓ | ✓ |

allaboutcircuits.com | ✓ | ✓ | x |

qorvo.com | x | ✓ | x |

leleivre.com | x | ✓ | x |

emtalk.com | ✓ | ✓ | x |

rfwireless-world.com | ✓ | x | ✓ |

## everythingrf

**everythingrf **is a free **online noise figure calculator website**. This website mainly offers a **cascaded noise figure calculator** that allows users to calculate the **total noise figure** and **total gain** of a cascaded circuit like a multistage amplifier. To perform the calculation, users need to specify the number of stages in a cascade circuit, Noise figure (db) & Gain (db) values of each stage. After performing the calculation, it shows the total noise figure and total gain values.

This website also shows an **n-stage cascaded amplifier diagram** and noise figure calculation formula. Now, follow the below steps.

### How to calculate noise figure online using everythingrf:

- Start this website and access the Cascaded Noise Figure Calculator.
- After that, specify the
**number of circuit stages**. - Next, enter the noise figure and gain values of all stages.
- Finally, click on the
**Calculate**button to view the total noise figure value.

### Additional Features;

- This website also offers additional tools like RF Attenuator Calculator, Balanced attenuator Calculator, Tee Attenuator Calculator, Coax Calculator, IRA Calculator, and more.

### Final Thought:

It is a simple online noise figure calculator website through which users can calculate both total noise figures and total gain values.

Pros | Cons |
---|---|

Shows n-stage cascaded amplifier diagram | |

Provides calculation formula |

## pasternack.com

**pasternack.com** is another free online noise figure calculator website. It is another good website to calculate noise figures of multi-stage cascade amplifiers. It supports cascaded amplifiers of up to **10 stages**. Along with the noise figure, it can also calculate the **Total Gain** of the circuit. To help out users, it also shows the **formula** that it uses to calculate the total noise figure. Now, follow the below steps.

### How to calculate noise figure online using pasternack.com:

- Go to this website using the given link.
- After that, specify the number of cascaded amplifiers.
- Now, enter the
**Noise**and**Gain values**of each amplifier. - Finally, click on the
**Calculate**button to view total noise figure and total gain values in dB.

### Additional Features:

- On this website, users can also browse and purchase Cables, Adapters, Filters, Noise Sources, Surge Protectors, etc., equipment.

### Final Thoughts:

It is another good online noise figure calculator that can calculate noise figures of multi-stage cascaded amplifiers.

Pros | Cons |
---|---|

Shows calculation formula |

## omnicalculator.com

**omnicalculator.com** is another free online noise figure calculator website. This website comes with multiple online calculators one of which is a Noise Figure Calculator. This calculator can calculate the noise figure of multiple-stage cascaded amplifiers. It can also use **SNR (db), SNR (absolute), **and **Noise Factor** values to calculate the noise figure.

This website also explains both noise figures and noise factors. It also explains the steps to calculate the noise figure. Plus, it also shows essential calculation formulas that it uses to find out the noise figure value. Now, follow the below steps.

### How to calculate noise figure online using omnicalculator.com:

- Go to this website using the given link.
- After that, choose cascaded amplifiers, SNR, or Noise Factor option.
- Now, enter the required input values.
- Finally, view the calculated noise figure in db unit.

### Additional Features:

- This website users get multiple calculators associated with fields like Biology, Chemistry, Construction, Finance, Maths, etc.

### Final Thoughts:

Through this website, users can perform noise figure calculations using either SNR, Cascaded Amplifiers, and Noise Factor values.

Pros | Cons |
---|---|

Can calculate NF using SNR, Cascaded Amplifiers, and Noise Factor values |

## allaboutcircuits.com

**allaboutcircuits.com** is another free online noise figure calculator website. This website offers a simple noise figure calculator that calculates noise figures of multiple cascaded amplifiers. Although, users need to enter the **Noise** and **Gain values** of all the cascaded amplifiers. It also shows a basic cascaded amplifier circuit diagram along with necessary noise figure calculation equations. After performing the calculation, it shows total noise and gain values in the decibel unit. Now, follow the below steps.

### How to calculate noise figure online using allaboutcircuits.com:

- Go to this website using the given link.
- After that, specify the number of cascaded amplifiers.
- Next, enter the noise and gain values of each amplifier stage.
- Finally, click on the
**Calculate**button to view the noise figure and total gain values.

### Additional Features:

- This website also offers some related calculators such as noise figure, noise temperature, Sinclair 300, and more.

### Final Thoughts:

It is another good online noise figure calculator website that helps users find out the noise figure values of multi-stage cascaded amplifiers.

Pros | Cons |
---|---|

Shows cascaded amplifiers diagram | |

Provides necessary calculation equations |

## qorvo.com

**qorvo.com** is another free online noise figure calculator website. This website offers a cascade analysis calculator that can also be used to find out the Noise Figure value. Plus, it lets users mix the components (Amplifier, Attenuator, Filter, Saw Filter, Mixer, etc.) of each stage. Apart from, the noise figure, users can also calculate **Gain, P1db, **and **IP3** values. It also shows the equation that it uses to calculate the Noise Figure. Now, follow the below steps.

### How to calculate noise figure online using qorvo.com:

- Go to this website and enter the number of stages.
- Next, select the component of each stage from the available ones.
- Now, enter the
**NF values**of each stage. - Finally, view the calculated ND value in the dB unit.

### Additional Features:

- On this website, users can browse and purchase various electronic components like Amplifiers, Discrete Transistors, Power Solutions, Mobile Amplifiers, and more.

### Final Thoughts:

It is another good noise figure calculator website that can also be used to calculate Gain, IP3, and P1dB values.

Pros | Cons |
---|---|

Supports separate components for each stage | |

Shows calculation formulas |

## leleivre.com

**leleivre.com** is another free online noise figure calculator website. Through this website, users can quickly calculate the noise figure values of **up to 6 cascade stages**. As input, it needs **NF** and **Gain** value of all the stages. It also shows the equations that it uses to perform the noise figure calculation. After performing the calculation, it also shows the Cascade Gain value. Now, follow the below steps.

### How to calculate noise figure online using leleivre.com:

- Visit this website and select the Cascaded Noise Figure Calculator.
- Now, enter the NF and Gain values of up to 6 cascade stages.
- Next, click on the
**Calculate**button to view the cascade noise figure and gain values.

### Additional Features:

- A good set of additional RF Tools are also present on this website like ADC Alias Calculator, Attenuator Calculator PI, LC Resonance Calculator, Path Loss Calculator, and more.

### Final Thoughts:

It is another good online noise figure calculator website that anyone can use with ease.

Pros | Cons |
---|---|

Shows calculation formulas |

## emtalk.com

**emtalk.com** is another free online noise figure calculator website. This website offers a simple Noise Figure Calculator that works with up to **30 cascade** stages. Users need to provide the NF and Gain values of all the cascade stages. It also shows a basic cascade circuit diagram and noise figure calculation formula. After performing the calculation, it shows the total noise figure, total gain, and noise temperature in kelvin. Now, follow the below steps.

### How to calculate noise figure online using emtalk.com:

- Launch this website and access the Noise Figure Calculator.
- After that, specify the
**number of cascade stages**. - Next, enter the
**NF**and**Gain**values of each stage. - Finally, click on the Calculate button to view the final Total NF, Total Gain, and Noise Temp values.

### Additional Features:

- This website also offers additional RF and engineering tools like Microstrip Line Calculator, VSWR Calculator, Microstrip Path Antenna Calculator, and more.

### Final Thoughts:

It is another good online noise figure calculator that anyone can use to calculate noise figure, total gain, and noise temperature values.

Pros | Cons |
---|---|

Can also calculate total gain and noise temp values |

## rfwireless-world.com

**rfwireless-world.com** is the last free online noise figure calculator website. Through this website, users can calculate noise figures of up to **4 stage** cascaded amplifiers. Like other similar websites, it also needs Noise Figures and Gain Values of all cascade stages. It also offers an **example** highlighting the aggregate figure calculation process. After calculation, users get the Aggregate noise figure (in linear terms) and Aggregate Noise Figure (in dB). Now, follow the below steps.

### How to calculate noise figure online using rfwireless-world.com:

- Go to this website using the given link.
- After that, enter the Noise Figure and Module Gains of all stages.
- Now, click on the
**Calculate**button to view the calculated noise figure values.

### Additional Features:

- This website also offers additional online calculators and converters such as Channel Capacity Calculator, Radar Range Calculator, Power Unit Conversion, Floating vs Fixed Point, etc.

### Final Thoughts:

It is another good online noise figure calculator website that can calculate 4-stage aggregate cascaded noise figure values.

Pros | Cons |
---|---|

Provides a calculation example |

## Frequently Asked Questions

To calculate the noise figure, you need to first determine the input signal-to-noise ratio. After that, measure the output signal-to-noise ratio. After that calculate the noise figure (NF) using the given formula: NF (dB) = 10 * log10 (SNR_out / SNR_in).

The noise figure is a measure of the degradation in the signal-to-noise ratio (SNR) caused by a device or system. It is usually expressed in decibels (dB). The SNR represents the ratio of the power of the desired signal to the power of the noise present in the signal. Noise figure. On the other hand, quantifies the degradation in SNR caused by a device or system. It represents the additional noise introduced by the device or system beyond what is present in the input signal.

No, the noise figure cannot be less than 1. The noise figure is always equal to or greater than 1. A noise figure of 1 dB would indicate that the device or system introduces the same amount of noise as an ideal, noiseless system. In practical terms, it is not possible to achieve a noise figure less than 1 dB because all real-world components and systems introduce some amount of noise.

### Naveen Kushwaha

Passionate about tech and science, always look for new tech solutions that can help me and others.

## About Us

We are the team behind some of the most popular tech blogs, like: I LoveFree Software and Windows 8 Freeware.

More About Us##### Archives

- May 2024
- April 2024
- March 2024
- February 2024
- January 2024
- December 2023
- November 2023
- October 2023
- September 2023
- August 2023
- July 2023
- June 2023
- May 2023
- April 2023
- March 2023
- February 2023
- January 2023
- December 2022
- November 2022
- October 2022
- September 2022
- August 2022
- July 2022
- June 2022
- May 2022
- April 2022
- March 2022
- February 2022
- January 2022
- December 2021
- November 2021
- October 2021
- September 2021
- August 2021
- July 2021
- June 2021
- May 2021
- April 2021
- March 2021
- February 2021
- January 2021
- December 2020
- November 2020
- October 2020
- September 2020
- August 2020
- July 2020
- June 2020
- May 2020
- April 2020
- March 2020
- February 2020
- January 2020
- December 2019
- November 2019
- October 2019
- September 2019
- August 2019
- July 2019
- June 2019
- May 2019
- April 2019
- March 2019
- February 2019
- January 2019
- December 2018
- November 2018
- October 2018
- September 2018
- August 2018
- July 2018
- June 2018
- May 2018
- April 2018
- March 2018
- February 2018
- January 2018
- December 2017
- November 2017
- October 2017
- September 2017
- August 2017
- July 2017
- June 2017
- May 2017
- April 2017
- March 2017
- February 2017
- January 2017
- December 2016
- November 2016
- October 2016
- September 2016
- August 2016
- July 2016
- June 2016
- May 2016
- April 2016
- March 2016
- February 2016
- January 2016
- December 2015
- November 2015
- October 2015
- September 2015
- August 2015
- July 2015
- June 2015
- May 2015
- April 2015
- March 2015
- February 2015
- January 2015
- December 2014
- November 2014
- October 2014
- September 2014
- August 2014
- July 2014
- June 2014
- May 2014
- April 2014
- March 2014