moa calculator

What Is MOA?

MOA stands for Minute of Angle. It is an angular measurement used by shooters to describe rifle precision and scope adjustments. One MOA equals 1/60th of one degree. Because MOA is angular, its linear size grows with distance.

At 100 yards, 1 MOA is approximately 1.047 inches. Many shooters simplify this to 1 inch at 100 yards for quick field math, but the exact value is better when you want precise zeroing or long-range holds.

How This MOA Calculator Helps

This page includes three tools that handle the most common shooting math:

• Group size to MOA: Understand how accurate your rifle and load are.
• MOA to inches: Translate angular corrections into real-world target shifts.
• Scope click calculation: Convert required impact movement into turret clicks.

These calculations are useful for sight-in sessions, load development, and long-range practice where consistency matters.

MOA Formulas (Exact)

1) Group Size to MOA

MOA = (Group Size in inches × 100) ÷ (Distance in yards × 1.047)

2) MOA to Inches

Inches = MOA × 1.047 × (Distance in yards ÷ 100)

3) Correction Inches to MOA

Correction MOA = (Shift in inches × 100) ÷ (Distance in yards × 1.047)

4) MOA to Turret Clicks

Clicks = Correction MOA ÷ MOA per click

Practical Example

Say your 5-shot group measures 1.5 inches at 100 yards. Your precision is roughly:

(1.5 × 100) ÷ (100 × 1.047) = 1.43 MOA

If your point of impact is 2 inches low at 200 yards with a 1/4 MOA scope:

• Vertical MOA needed: (2 × 100) ÷ (200 × 1.047) = 0.96 MOA
• Clicks needed: 0.96 ÷ 0.25 = 3.84, so dial about 4 clicks up.

MOA vs MRAD (MIL)

Both MOA and MRAD are angular systems. Neither is “better” universally. The key is matching your reticle subtensions, turret system, and mental workflow.

• MOA: Common in hunting and many U.S. optics; often 1/4 MOA clicks.
• MRAD: Popular in tactical and competition circles; often 0.1 mil clicks.

If your optic is MOA/MOA (reticle and turret both MOA), this calculator gives direct and useful numbers without cross-system conversion.

Common MOA Mistakes to Avoid

Using center-to-center group measurement incorrectly

For accuracy testing, measure group size from the two furthest bullet-hole centers. A common method is outside-to-outside minus bullet diameter.

Rounding too early

Keep decimals during calculation, then round turret clicks only at the final step.

Mixing yards and meters

This calculator assumes yards. If you shoot in meters, convert distance first or use a dedicated meter-based formula.

Ignoring environmental factors

MOA math handles geometry, but wind, ammo consistency, barrel heat, and shooter fundamentals still dominate real-world results.

Quick Reference Cheat Sheet

• 1 MOA at 100 yards ≈ 1.047 inches
• 1/4 MOA click at 100 yards ≈ 0.26 inches
• 1/4 MOA click at 200 yards ≈ 0.52 inches
• 1/4 MOA click at 300 yards ≈ 0.79 inches
• 1/4 MOA click at 400 yards ≈ 1.05 inches

Final Thoughts

A good MOA calculator removes guesswork and helps you make clean, repeatable adjustments. Use the tool above during range sessions, log your results, and compare groups over time. Consistent data plus disciplined fundamentals is the fastest path to better precision.