MOA vs MRAD: Which Scope Should You Actually Buy?

Neither MOA nor MRAD is more accurate. They are two different units for measuring the same thing, which is angle. MOA measures in minutes of angle, where 1 MOA covers about 1.047 inches at 100 yards. MRAD measures in milliradians, where 1 mil covers 3.6 inches at 100 yards. MOA gives finer adjustment per click. MRAD uses simpler base-ten math and is the standard in military and competition shooting. The only rule that genuinely matters is that your reticle and your turrets must use the same unit.

Key takeaways

• 1 MOA equals 1.047 inches at 100 yards, commonly rounded to 1 inch. 1 MRAD equals 3.6 inches at 100 yards, or exactly 10 centimeters at 100 meters.
• 1 MRAD equals 3.438 MOA. There is no situation where one unit measures something the other cannot.
• Standard click values are 1/4 MOA, which moves 0.26 inches at 100 yards, and 0.1 MRAD, which moves 0.36 inches at 100 yards.
• MOA therefore offers roughly 38 percent finer adjustment per click. In practice this almost never limits accuracy.
• A mil reticle paired with MOA turrets, or the reverse, is the most common and most costly scope buying mistake.
• MRAD dominates military use and precision rifle competition. MOA remains common in American hunting and benchrest shooting.

What is MOA?

MOA stands for minute of angle. A circle contains 360 degrees, and each degree divides into 60 minutes, so one MOA is 1/60th of one degree. That's the whole definition, and nobody is born knowing it.

Because it's an angular measurement, the distance it covers grows with range. At 100 yards, 1 MOA subtends 1.047 inches. At 200 yards it covers 2.094 inches, at 500 yards 5.235 inches, and so on.

Almost everyone rounds that 1.047 down to 1 inch and calls it good. That approximation is fine at any distance you're likely to shoot. At 100 yards the error is under half a millimeter. It only starts to show at extended range, where 1,000 yards gives you 10.47 inches per MOA rather than 10. Shooters who care about that distinction call the rounded version "shooter's MOA" or SMOA, and some scopes are actually calibrated to it.

Most MOA scopes adjust in quarter-MOA clicks. Four clicks moves your point of impact roughly one inch at 100 yards, which is an easy number to keep in your head at the bench.

What is MRAD?

MRAD stands for milliradian, usually shortened to mil. A radian is the angle you get when the arc length equals the radius, and there are just over 6,283 milliradians in a circle. Don't worry about that number, you'll never use it.

The practical value of a mil is that it's a straightforward ratio. One mil equals one unit of measurement at one thousand units of distance. One meter at 1,000 meters. One yard at 1,000 yards. Ten centimeters at 100 meters. Three point six inches at 100 yards.

That last figure is where the arithmetic gets slightly awkward if you work in yards, and it's the main reason American shooters have historically preferred MOA. The mil system was designed around the metric system, and it shows.

Most MRAD scopes adjust in 0.1 mil clicks. Ten clicks moves your point of impact one full mil, which is 3.6 inches at 100 yards.

How do MOA and MRAD convert?

• At 100 yards: 1 MOA is 1.047 inches, 1 MRAD is 3.6 inches
• At 100 meters: 1 MOA is 2.908 centimeters, 1 MRAD is 10 centimeters
• At 1,000 yards: 1 MOA is 10.47 inches, 1 MRAD is 36 inches
• Standard click value: 1/4 MOA, or 0.1 MRAD
• Movement per click at 100 yards: 0.26 inches on MOA, 0.36 inches on MRAD
• Clicks per full unit: 4 on MOA, 10 on MRAD
• Clicks to move 1 inch at 100 yards: about 4 on MOA, about 2.8 on MRAD

The conversion is fixed. 1 mil equals 3.438 MOA, and 1 MOA equals 0.291 mil. Multiply mils by 3.438 to get MOA. Divide MOA by 3.438 to go the other way.

You should never be doing that conversion in the field. If you find yourself converting between units during a string of fire, something's gone wrong with your setup, and the next section explains what.

The mistake that costs people money

Buy a scope with a milliradian reticle and MOA adjustment turrets, and you've bought a problem. Plenty of good shooters have done it, usually because nobody told them to check.

Here's why it matters. Modern precision shooting relies on a workflow where you observe a miss through the reticle, read the deviation off the reticle's hash marks, and then dial that exact figure on the turret. See a shot land 1.4 mils low, dial 1.4 mils up, fire again. The reticle and the turret speak the same language, so the correction is direct and takes about two seconds.

Now mismatch them. You observe a miss 1.4 mils low, and your turret is calibrated in quarter-MOA clicks. You now need to multiply 1.4 by 3.438 to get 4.81 MOA, then multiply by 4 to get 19.2 clicks, then decide whether to dial 19 or 20. You'll be doing this under time pressure, possibly with a heart rate above 120, and you'll get it wrong sooner or later. That isn't a skill problem, it's a design problem.

Scopes sold this way still exist, usually at the budget end, and they're a false economy. Check the reticle unit and the turret unit separately before you buy. The product name won't always tell you, so ask if it isn't obvious.

The same logic applies to holdovers. If you hold rather than dial, the reticle is doing all the work, and a reticle whose subtensions match your data is worth more to you than any other single feature on the scope.

Does first or second focal plane change this?

It changes whether your reticle measurements stay true, and it's the part most buyers skip over.

In a first focal plane scope, the reticle sits ahead of the magnification lenses, so it grows and shrinks with the image. The relationship between the reticle marks and the target stays constant at every magnification. A 1 mil hash mark measures 1 mil at 5x and at 25x.

In a second focal plane scope, the reticle stays the same visual size while the image changes. The subtensions are only correct at one specific magnification, usually the highest setting, and reading a holdover at any other power gives a wrong answer unless you do further math.

If you plan to range, hold or measure with the reticle, first focal plane makes life significantly easier and the choice of unit becomes more consequential. If you dial every shot and use the reticle only as a crosshair, second focal plane is perfectly workable and often gives you a finer aiming point at low magnification.

This distinction matters far more than MOA versus MRAD does, and it gets a fraction of the attention. If you only take one thing from this article to the counter with you, take that.

Who uses which, and why?

MRAD has effectively won at the top of the sport. US and NATO military sniper programs standardized on mils long ago, largely because the base-ten arithmetic suits range estimation formulas and because it makes spotter-to-shooter communication unambiguous. Precision Rifle Series competition followed, and today the overwhelming majority of PRS and NRL competitors run mil reticles with mil turrets.

There's a practical reason beyond the math. When a spotter calls a correction, both people need to be working in the same unit, instantly. A shared standard removes an entire category of error, and mils became that standard.

MOA remains common in American hunting, in benchrest and F-class shooting, and among shooters who think natively in inches and yards. If your dope is written in inches, and you sight in at 100 yards and think in terms of a one inch group, MOA maps onto how you already think without any friction at all.

Neither community is wrong, and you won't get a funny look at any range worth shooting at for turning up with either one. Both are optimizing for how they actually think about distance.

So which should you buy?

Work through it in this order.

1. Match the reticle to the turrets. This isn't a preference, it's a requirement. Everything else is secondary.
2. Match the people you shoot with. If your regular shooting partner, your club or your competition circuit runs mils, run mils. Shared units make spotting work.
3. Match how you think about distance. If you naturally reason in inches and yards, MOA will feel intuitive. If you're comfortable with metric or base-ten math, MRAD will.
4. Consider where you're heading. If you think you'll shoot precision rifle competition or move into long range work, learn mils now rather than relearn later.
5. Then think about click value. For most shooters it's the least important factor on the list, despite getting the most argument online.

If you're zeroing a hunting rifle at 200 yards and holding inside 400, either unit serves you well. If you want to engage steel at 1,000 yards with a spotter calling corrections, run mils, because that's the language everyone else is speaking.

Whichever you pick, commit to it across your rifles. Running MOA on one scope and mils on another is the same problem as mismatched reticles and turrets, just spread across your safe.

One more thing before you spend the money. If you're building a long range setup, check that your rifle scope has enough elevation travel and a mount to suit, because running out of adjustment at distance trips up far more people than picking the wrong unit ever has.

The same scope, in both languages

The clearest illustration of all this sits on our own shelves, and you can check it yourself on any spec sheet.

Nightforce builds the ATACR 5-25x56 in both units. The MOAR version has a 0.250 MOA click value and 120 MOA of elevation travel. The Mil-C version has a 0.1 mil click and 35 mil of elevation. Run the conversion: 35 mil is 120.3 MOA. Same scope, same glass, same internal travel, same list price. The only thing that changed is the language printed on the turret and etched into the reticle.

One photograph, two products. The MOAR and the Mil-C versions of the ATACR 5-25x56 share the same product image because they are the same scope. Only the reticle etching and the turret markings differ.

That is the entire argument in one product line. You aren't buying more capability with one unit or less with the other, and you aren't paying extra either way. You're choosing which language you want to think in for the next ten years.

It also shows why the matching rule is easier to follow than it sounds. A manufacturer building the two versions as separate, deliberate products pairs a MOA reticle with MOA turrets and a mil reticle with mil turrets, because that's the only sensible way to build it. The mismatched scopes worth worrying about are mostly at the budget end, where the reticle and the turret got specified by different priorities. Buy from a maker that treats the two units as two products and the problem largely takes care of itself.