Golf Tutorials

How to Use a Golf Putting Alignment Mirror

By Spencer Lanoue
July 24, 2025

A golf putting alignment mirror is one of the simplest yet most effective training aids you can own, giving you immediate visual feedback on the most important parts of your setup and stroke. It’s a tool that takes the guesswork out of your practice, helping you build a repeatable putting motion grounded in solid fundamentals. This guide will walk you through exactly how to set up and use a putting mirror to check your alignment, perfect your path, and start holing more putts.

What is a Putting Alignment Mirror and Why Do You Need One?

At its core, a putting alignment mirror is a small, portable mirror with alignment lines drawn on it. You place it on the practice green, put your ball on a designated spot, and look down. What you see instantly tells you several things that are nearly impossible to check on your own.

Golfers, from tour professionals to weekend players, use these mirrors because putting is a game of precision. Being off by a single degree in your setup can be the difference between making a putt and watching it lip out. The mirror doesn't lie, it provides an objective look at:

  • Eye Position: Where your eyes are in relation to the ball and target line directly influences how you perceive the line of the putt.
  • Shoulder Alignment: If your shoulders are open or closed to the target line, your stroke path will struggle to stay square.
  • Putter Face Alignment: The mirror’s lines make it easy to see if your putter face is perfectly square to the target line at address.
  • Putting Stroke Path: By watching the putter move back and through along the guides, you can train a more consistent and on-plane stroke.

Using a mirror brings a purpose to your practice. Instead of aimlessly hitting putts and hoping for the best, you are actively checking and reinforcing a mechanically sound foundation every single time.

Getting Started: Your First Steps with the Mirror

Before you dive into specific drills, it’s important to get the basic setup right. Doing this correctly ensures that the feedback you’re getting is accurate and useful.

A Step-by-Step Setup Guide

  1. Find a Straight Putt: Start on the practice green with a straight, flat putt of about four to six feet. This removes the variable of reading a break, allowing you to focus purely on mechanics.
  2. Align the Mirror: Place the mirror on the ground so that the main center line (or target line) is pointing directly at the center of the hole. Most mirrors have a bold line for this purpose. Get behind the mirror and look down the line to double-check that it’s aimed perfectly. This is the most important step - if the mirror isn't aimed correctly, all your subsequent feedback will be based on a false alignment.
  3. Place the Golf Ball: Your mirror will have a cutout or a marked spot for the ball. Place your golf ball there. This position is strategically located to help you check your eye position later.

With the mirror and ball in place, you're ready to take your stance and start checking your fundamentals.

Checkpoint #1: Verifying Your Eye Position

The single most valuable piece of feedback the mirror provides is on your eye alignment. If your eyes aren't in the right spot, you can easily misperceive the putting line, leading you to an incorrect alignment before you even start the stroke.

Why Eye Position Matters

Imagine looking at an object from the side versus looking at it straight on, your perspective changes. The same happens in putting. If your eyes are too far inside the ball, the hole may appear further to the right than it is. If your eyes are outside the ball, it may look further left. For a consistent view, you want your eyes consistently in the same spot on every putt.

How to Check It

Take your normal putting stance over the mirror. Settle in and look down. You should see the reflection of your eyes on the mirror's surface.

  • The Ideal Position: For most golfers, the ideal position is to have your eyes directly over the target line drawn on the mirror. This gives you a true, unobstructed view of the path to the hole.
  • A Common Alternative: Some great putters prefer their eyes to be slightly inside the target line. This is also a perfectly acceptable position, as long as it's consistent. Just be aware of it.
  • The Position to Avoid: What you generally want to avoid is having your eyes outside the target line (closer to your feet). This is an uncommon position among skilled putters and often leads to a stroke path that cuts across the ball.

The first few times you do this, you might be surprised where your eyes actually are. Use the guiding line on the mirror as your non-negotiable reference point. Adjust your posture - bending more from the hips or standing slightly closer or further from the ball - until your eyes are consistently in that "eyes-over-the-line" position.

Checkpoint #2: Squaring Your Shoulders and Putter Face

Once your eyes are positioned correctly, the mirror can help with the next two critical alignment points: your shoulders and the putter face.

Shoulder Alignment

Your putting stroke is largely driven by the rocking of your shoulders. If your shoulders aren't parallel to your target line, it's very difficult to swing the putter along that line. Most right-handed amateurs who struggle with alignment have shoulders that are "open," or aimed to the left of the target.

How to Check It: While looking in the mirror, pay attention to the reflection of your shoulders. Most mirrors have horizontal lines that are perpendicular to the main target line. Use these lines as a guide. Your shoulder line should be perfectly parallel to these horizontal lines. If your left shoulder seems higher or more forward in the reflection, you’re open. If your right shoulder feels more forward, you’re closed. Adjust your setup until your shoulders appear level and square in the mirror.

Putter Face Alignment

More than 80% of a putt's starting direction is determined by the putter face angle at impact. Even with a perfect path, an open or closed face will send the ball offline. The mirror is a fantastic tool for dialing this in.

How to Check It: Place your putter head down behind the ball. The mirror has a bold line that sits perfectly flush against the putter face when it’s square. Line up the leading edge of your putter with this line. Your goal is to make a square putter face at address feel completely normal. Practice taking your setup over and over, lifting the putter and placing it back down, until setting it perfectly square becomes second nature.

Simple and Effective Drills for Your Mirror

Just checking your setup is great, but to really ingrain good habits, you need to use the mirror for practice drills.

Drill 1: The Stroke Path 'Gate' Drill

This is a classic for a reason. It gives you instant feedback on the path of your putting stroke.

  1. Set up your mirror as usual.
  2. Place two tees in the ground just outside the heel and toe of your putter at the back of the mirror. This creates the "back gate."
  3. Place two more tees creating a slightly wider "front gate" about 6-8 inches in front of your golf ball. If your mirror has slots for tees, use them.
  4. Your goal is to make a stroke - back and through - without hitting any of the four tees. If you hit the back-right tee (for a righty), your takeaway is too far inside. If you hit the front-left tee on the follow-through, you are cutting across the ball. This drill forces you to swing the putter head directly down the line.

Drill 2: The 'Start Line' Drill

This drill ensures you are not only square at address but also at impact.

  1. Set up the mirror on your straight 4-foot putt.
  2. Go through your full pre-putt alignment check: eyes, shoulders, and putter face.
  3. Now, hit the putt. Pay close attention to watching the ball roll directly over the center line on the mirror.
  4. If the ball starts right or left of the line, you know your face wasn't square at the moment of impact. The goal isn't just to make the putt, but to watch the ball track perfectly down that main alignment line. Repeat this until you can consistently roll the ball down the line for its entire journey across the mirror.

Final Thoughts

Integrating a putting alignment mirror into your regular practice routine will provide the clear, consistent feedback needed to build a solid putting foundation. By checking your eye position, shoulder alignment, putter face angle, and stroke path, you can eliminate guesswork and practice with purpose, leading to more confidence and more made putts on the course.

Once you’ve built strong fundamentals on the practice green, the next step is applying that good form under pressure. We designed Caddie AI to bridge that gap between practice and play. It’s like having a coach in your pocket on the course, offering real-time advice on strategy for every hole or even analyzing tricky lies from a photo you take. When you can combine a reliable stroke with smarter decisions, you’ll find the game becomes a whole lot simpler and more enjoyable.

Spencer has been playing golf since he was a kid and has spent a lifetime chasing improvement. With over a decade of experience building successful tech products, he combined his love for golf and startups to create Caddie AI - the world's best AI golf app. Giving everyone an expert level coach in your pocket, available 24/7. His mission is simple: make world-class golf advice accessible to everyone, anytime.

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