MRAD vs MOA: What’s the Difference?

When making precise shots over long distances, understanding your rifle scope’s reticle system is critical. Whether you’re dialing in a bolt-action for a hunting trip or zeroing a competition AR-10, the right choice is always the optic  that feels most natural to you. 

Two of the most popular reticle systems in modern optics are MRAD (Milliradian/MIL) and MOA (Minute of Angle). Understanding the difference between MRAD vs MOA is one of the first decisions any long-range shooter needs to make.

Each system has its advantages, and while neither is inherently superior, the right choice comes down to your use case, experience, and personal preference. In this guide, we’ll break it all down to help you decide which is the better fit for your setup.

What Does MOA Mean?

MOA, or Minute of Angle, is an angular measurement where one MOA equals 1/60th of a degree. Practically speaking, this translates to about 1.047 inches at 100 yards, though most shooters round it to an even inch for simplicity. MOA reticles are often designed with tick marks or a full grid that allows shooters to compensate for range and windage. Most MOA scopes feature ¼ MOA adjustments, meaning each click of the turret moves the point of impact by ¼ inch at 100 yards.

The imperial system makes MOA particularly appealing for American shooters accustomed to using inches and yards. Adjustments feel natural for those who think in these terms, and the finer ¼ MOA increments allow for precise zeroing and long-range adjustments. However, the system can feel cumbersome when paired with metric units, as conversions are less straightforward. 

What Does MRAD Mean?

MRAD, also known as Milliradian or simply MIL, is another angular measurement but operates within the metric system. One MRAD represents 1/1000th of the distance to your target, making it proportional to the range. At 100 meters, 1 MRAD equals 10 centimeters, while at 100 yards, it equals 3.6 inches. This proportionality makes MRAD reticles especially intuitive for base-10 calculations of metric measurements.

Most MRAD scopes feature 0.1 MRAD adjustments, shifting the point of impact by 1 centimeter at 100 meters (or approximately 0.36 inches at 100 yards) per click. These reticles often include additional subtensions, such as 0.2 or 0.5 MRAD marks, which help shooters make precise holdovers for windage and bullet drop. 

While MRAD is easier to use with the metric system, it can also accommodate imperial measurements, but the math is far more complicated (due to inch-to-foot conversion being 12 rather than 10).

MRAD vs MOA

Both MRAD and MOA are effective tools for long-range shooting, but they excel in different contexts. MOA’s optics usually come with finer .25 MOA adjustments, which can be advantageous when you’re dealing with the absolutely most precise level of shooting. 

On the other hand, MRAD’s proportional system and compatibility with the metric system make it a favorite among military personnel and professional long-range shooters. Holds tend to be easier to remember, too, as MRAD adjustments tend to be much shorter, simpler numbers. For example, a 7.9 MRAD hold would be 27.25 in MOA. In this case, MRAD is obviously much easier to remember and faster to communicate.  

Beyond this, the two systems differ slightly in how they can range the target.

Ranging with MRAD and MOA

In the past, one of the most critical applications of both MRAD and MOA systems is ranging your target. Ranging refers to estimating the distance between you and your target using the subtensions on your reticle. Nowadays, most civilian marksmen prefer to just use a laser rangefinder, but if you’re dedicated to mastering your optic, it’s good to know how these units can be used to calculate a target distance in a pinch.

Ranging with MRAD

As we’ve discussed, MRAD reticles excel in their ability to range targets with metric units. Each milliradian represents 1/1000th of the distance to your target. This proportional relationship makes MRAD calculations straightforward for metric users. The formula for determining range with MRAD is as follows:

• Meters: Target’s Estimated Size in Centimeters × 10 ÷ Target’s Observed Size in MRAD = Distance to Target (Meters)
• Yards: Target’s Estimated Size in Inches × 27.78 ÷ Target’s Observed Size in MRAD = Distance to Target (Yards)

As you can see, the awkward ratio of inches to yards complicates the math for imperial measurements. For this reason, shooters dedicated to imperial units often prefer MOA reticles.

Ranging with MOA

MOA reticles are also effective for ranging, especially for shooters accustomed to the imperial system. The formula for determining range using an MOA reticle is:

• Yards: Target’s Estimated Size in Inches × 100 ÷ Target’s Observed Size in MOA = Distance to Target (Yards)
• Meters: Target’s Estimated Size in Centimeters × 34.38 ÷ Target’s Observed Size in MOA = Distance to Target (Meters)

It’s very important to note that the ‘100’ multiplier in our first equation uses the common 1-inch to 1 MOA rounding. If you want the most accurate result, you’d multiply by 95.5 instead. This obviously complicates the math considerably, which is why so many favor the rounded equation unless they’re shooting at extreme distances.

Our second equation also showcases the challenge of metric. While MOA can theoretically be used with metric measurements, the conversions between inches and centimeters add a ton of complexity. For this reason, MOA is rarely used outside of the United States.

Choosing Between MOA and MRAD

The choice between MRAD and MOA ultimately depends on your shooting preferences, environment, and the tools you already use. If you’re accustomed to thinking in inches and yards, and don’t mind using the rounded formula, MOA’s 1-inch-per-100-yards system might feel more intuitive. 

MRAD, however, offers much greater versatility, particularly for those who prefer metric units. The proportional scaling of MRAD reticles allows for faster and more precise calculations at long distances, and its simple numbers tend to be easier to remember and communicate with others. 

In general, MRAD is growing in popularity, while MOA is shrinking. Part of that is the military (which uses MRAD) influencing products and training protocol for elite marksmen, and part of it is simply a preference for simpler numbers. Either way, most precision optics will come with options available for both—at least while you’re within the United States.

Final Thoughts

Regardless of which you choose, the most important factor is your ability to master the system. 

Both options allow for exceptional accuracy when paired with practice and knowledge of your rifle’s ballistics. MRAD’s simplicity with metric measurements makes it a favorite for many professional shooters, while MOA’s finer adjustments and compatibility with the imperial system appeal to American hunters and recreational marksmen. 

If you’re brand new to long-range shooting and have no specific preference, we generally recommend MRAD, as that’s the main system you’ll find for high level instructors and content. 

Either way, you’ll need to spend time at the range, familiarize yourself with your optic’s reticle, and study ballistic charts for your ammunition. Whether for hunting or for PRS-style competitions, your ability to interpret the data provided by your optic can mean the difference between hitting your target or missing entirely.

Justin Trump

Justin Trump is the managing editor and owner of CAT Outdoors. The son of a Vietnam veteran, he’s a Certified Glock Armorer, an avid gun enthusiast and 2A advocate. He holds two firearm patents for the CAT M4 and Talon tools. When not managing CAT Outdoors, he enjoys spending time with his family and friends, rooting for Michigan sports teams, and serving his church.