6 Best Free Online Radar Horizon Calculator Websites

Here is a list of best free online radar horizon calculator websites. Radar horizon is the maximum distance at which radar can track a flying object. The radar horizon is mainly dependent upon the curvature of earth and height of the antenna from ground. The calculation of radar horizon is important in many fields like Radar Coverage Planning, Radar Communication Range, Target Detection and Tracking, Radio Frequency Planning, Over-the-Horizon Radar, and more. If you also want to calculate the radar horizon online, then check out these online radar horizon calculator websites.

Through these websites, users can quickly find out the radar horizon using known Radar System Height and Target Height Values. Apart from radar horizon, these websites can also calculate geometric target visibility and maximum radar distance values. A few calculators can also consider atmospheric refraction in the calculation of radar horizon value. Most of these calculators explain the concept of radar horizon and show formulas used to calculate radar horizon value. To help novice users, I have included the necessary radar horizon calculation steps in the description of each website.

These websites also offer additional tools such as Angular Resolution Calculator, Aperture Area Calculator, Binoculars Range Calculator, RC Circuit Calculator, etc. Go through the list to learn more about these websites.

My Favorite Online Radar Horizon Calculator Website:

omnicalculator.com is my favorite website as it explains the Radio Horizon concept with the help of formulas. Plus, it can also calculate maximum distance and target visibility values.

You can also check out lists of best free Online Brewster’s Angle Calculator, Online Azimuth Calculator, and Online Earthquake Energy Calculator websites.

Comparison Table:

Features/Website Names	Explains Radar Horizon	Shows Calculation Formula	Can also calculate geometric target visibility
omnicalculator.com	✓	✓	✓
translatorscafe.com	✓	✓	✓
mar-it.de	x	x	x
ewdefence.co.uk	x	x	x
3roam.com	x	✓	x
everythingrf.com	x	✓	x

omnicalculator.com

omnicalculator.com is a free online radar horizon calculator website. Using this website, users can quickly calculate the radar horizon (with refraction), target visibility (with refraction), and maximum distance (with refraction) values. To do that, it mainly uses Radar System Height and Target Height values. Besides this, it also considers the status of atmospheric refraction (Yes or No) in the calculation.

This website also explains radar horizon and shows the formula to calculate it. It also shows the steps to calculate radar horizon with practical examples. Now, follow the below steps.

How to calculate radar horizon online using omnicalculator.com:

Go to this website and access the Radar Horizon Calculator.
After that, specify the status of Atmospheric Refraction (yes or no).
Next, enter the Radar System Height and Target Height values and their units (km, m, in, ft, etc.).
Finally, view the calculated radar horizon value along with target visibility and maximum distance.

Additional Features:

This website also offers additional Optics and Light Calculators such as Angular Resolution, Aperture Area, Binoculars Range, Earth Curvature, etc.

Final Thoughts:

It is a good online radar horizon calculator website that also calculates target visibility and maximum distance values using the same set of input parameters.

Pros	Cons
Can also calculate maximum distance and target visibility values
Provides calculation steps with examples

Home Page

translatorscafe.com

translatorscafe.com is another free online radar horizon calculator website. This website helps users determine the geometric target visibility and radar target visibility using the radar and target elevation values. Both the radar and target height can be specified in meters, kilometers, and foot units. This website also shows formulas that it uses to calculate the radar horizon values. Now, follow the below steps.

How to calculate radar horizon online using translatorcafe.com:

Go to this website and access the radar horizon and target visibility calculator.
After that, enter the target height and radar height values.
Next, specify the SI units of radar and target height values.
Now, click on the Calculate button to start the calculation process.
Finally, view the calculated radar horizon, geometric horizon, geometric target visibility, and radar target visibility values.

Additional Features:

This website also comes with additional online tools such as RC Circuit Calculator, Parallel Resistance Calculator, Capacitor Impedance Calculator, Resistor Color Code Calculator, and more.

Final Thoughts:

It is another good online radar horizon calculator website that can also calculate geometric horizon values.

Pros	Cons
Can also calculate geometric horizon, geometric target visibility, and radar target visibility values
Shows calculation formula

Home Page

mar-it.de

mar-it.de is another free online radar horizon calculator website. This website comes with one of the simplest radar horizon calculators that uses height of radar antenna and target height values in meters to calculate the radar horizon. It shows the calculated radar horizon values in both nautical miles and kilometers. Although, it doesn’t explain the concept of radar horizon, unlike other similar websites. Now, follow the below steps.

How to calculate radar horizon online using mar-it.de:

Go to this website using the given link.
After that, enter the radar antenna height and target height values.
Next, click on the Compute radar horizon button.
Finally, view the radar horizon values in both nautical miles and kilometers range.

Final Thoughts:

This website offers a basic radar horizon calculator tool that can calculate and show the radar horizon value in nautical miles and kilometer units.

Pros	Cons
Calculated radar horizon in nautical miles and kilometers units	Lacks information related to radar horizon topic

Home Page

ewdefence.co.uk

ewdefence.co.uk is another free online radar horizon calculator website. This website offers multiple on-line calculators one of which is a radar horizon calculator. This calculator uses radar height and target height values to calculate the radar horizon distance in either kilometers or nautical miles. Although, this website doesn’t offer much information about radar horizon calculation. Now, follow the below steps.

How to calculate radar horizon online using ewdefence.co.uk:

Launch this website and select the Calculate Radar Horizon tool.
After that, enter the Radar Height and target Height values.
Now, choose the km or nautical miles unit for the radar horizon.
Finally, click on the Radar Horizon button to view the calculated value.

Additional Features:

As mentioned earlier, it offers multiple calculators such as power vs range calculator, DOA calculator, range calculator, AOA accuracy calculator, etc.

Final Thoughts:

It is another good online radar horizon calculator website that offers all the tools to calculate the radar horizon value.

Pros	Cons
	Lacks information related to radar horizon topic

Home Page

3roam.com

3roam.com is another free online radar horizon calculator website. This website can calculate both the radar horizon and maximum line of sight values. It also shows the formulas to calculate line of sight and radio horizon values. It also provides examples and diagrams to help users understand the topic of line of sight and radar horizon concepts. Now, follow the below steps.

How to calculate radar horizon online using 3roam.com:

Visit this website and access the Radar Horizon Calculator.
After that, enter the radio height 1 and radio height 2 values.
Next, specify the radio height units in feet or meters.
Finally, view the calculated radio horizon and line of sight values.

Additional Features:

This website also offers calculators such as Bias T, dB to voltage ratio, diapole antenna length, noise figure to noise factor, and more.

Final Thoughts:

It is another capable online radar horizon calculator website that can also be used to calculate the maximum line of sight range.

Pros	Cons
Can also calculate the maximum line-of-sight range

Home Page

everythingrf.com

everythingrf.com is another free online radar horizon calculator website. Through this website, users can calculate the line of sight and radio horizon values. To perform this calculation, it only requires antenna height in meters or feet unit. It also shows the formula that it uses to calculate the radio horizon value. Although, it doesn’t explain the radar horizon. Now, follow the below steps.

How to calculate radio horizon online using everythingrf.com:

Visit this website and access the Line of Sight calculator.
After that, enter the antenna height in meters or feet unit.
Next, click on the Calculate button to start the calculation process.

Additional Features:

This website also offers useful tools like RF Calculators, Cable Assembly Builder, RF Amplifiers, Microwave Frequency Bands, and more.

Final Thoughts:

It is another simple online radar horizon calculator website that also calculates line of sight distance.

Pros	Cons
Can also calculate the line of sight range	Calculates radio horizon instead of the radar horizon

Home Page

Frequently Asked Questions

What is the radar horizon and target visibility?

The radar horizon is the maximum distance from a radar system at which it can detect or track a target. It is primarily determined by the curvature of the Earth's surface and the height of the radar antenna above the ground. Radar signals travel in straight lines, and due to the Earth's curvature, they eventually encounter the Earth's surface and cannot continue beyond that point. On the other hand, Target visibility, in the context of radar, refers to whether a specific target or object is within the radar's range and can be detected or tracked by the radar system. It depends on several factors, including: Distance from the radar, Radar Cross-Section, Signal Strength, Clutter and interference, and Radar System Capabilities.

How far can a radar see to the horizon?

The maximum distance at which a radar can "see" or detect objects is determined by the radar horizon. The radar horizon represents the point beyond which radar signals cannot travel due to the curvature of the Earth's surface.

How do you calculate the radar horizon?

You can use, above mentioned radar horizon calculator websites to quickly calculate the radar horizon distance. These websites mainly required radar height and target distance values to calculate the radar horizon distance.

What is radar target range?

Radar target range refers to the distance between a radar system and a detected or tracked target. In radar terminology, "range" is one of the key parameters used to describe the position of a target in relation to the radar antenna. It represents the radial distance from the radar antenna to the target.

What is the maximum altitude for radar?

The maximum altitude at which radar can detect or track objects depends on several factors, including the specific radar system, its frequency, power, antenna design, and the properties of the objects being detected. There is no universal "maximum altitude" for radar, as different radar systems are designed for different purposes and have varying capabilities.

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