Putting Stroke Arc: Straight Back or Arc, Which Are You?

Putting instruction usually describes two kinds of stroke: straight back and through, or an arc that curves inside the target line.

Golfers are then often told to keep the stroke as straight as possible.

The physics complicate that advice. Because the shaft leans toward the body at address, the putter head naturally travels on a slight arc, and a perfectly straight putting stroke arc is close to impossible to produce consistently.

A stroke's shape is not a fault to be fixed; it is a product of geometry and individual movement. Knowing which arc you have makes it possible to match a putter to your stroke rather than working against it.

This guide covers why the putter moves on an arc, how to identify your own, and what it means for choosing a putter.

Why a straight-back-and-through stroke is hard to repeat

At address, the hands sit higher than the putter head, so the shaft tilts toward the golfer. When a tilted shaft swings around a relatively fixed point at the shoulders, the head cannot travel in a straight line. It moves on an arc, curving gently inside the target line on the way back and returning through impact. This is geometry rather than technique.

The more a golfer tries to force the head to travel straight, the more the hands and shoulders have to manipulate it against that natural path. Manipulation is difficult to repeat, particularly under pressure, and it is one common reason right-handed golfers pull short putts to the left while trying to steer the face straight.

Arc and straight are two ends of a spectrum

The two labels describe the extremes of a range rather than a simple either-or:

• Straight, or nearly straight: the head stays close to the target line with very little curve. This shape is rare in its pure form.
• Slight arc: a gentle curve inside on the backswing, returning through the ball. This is the most common shape.
• Strong arc: a pronounced curve, with the face rotating noticeably open and closed.

A stroke's backswing and follow-through do not always match. Some golfers move nearly straight back and then release with a strong arc, or the reverse, which means there are more real stroke shapes than the three or four usually illustrated.

None of them is a defect. The aim is to identify the shape, not to erase it.

How to identify your putting stroke

A simple assessment is enough:

1. Film several putts from above, using a phone on a tripod, looking down at the putter. Watch whether the head stays on the line or works inside on the backswing and followthrough.
2. A good tool to have is a mat with a straight line placed underneath your stroke. This helps visualize how much the putter head moves away from the straight line.

Some ambiguity is normal, particularly where the backswing and through-stroke differ. That asymmetry is exactly what a video check or a fitting captures and an eye-only assessment misses.

Matching a putter to the stroke

Identifying the stroke is only half the value. A putter can either cooperate with the stroke or resist it, and that is a specification a golfer can control. Two things are matched to the stroke, in order:

• Path is handled by the lie angle and shaft position, which orient the head to the way the stroke travels so the putter stays stable through the motion.
• Face rotation is handled by the balance, specifically the centre of gravity. A face-balanced putter resists rotation and suits a straighter stroke, while a putter with toe hang rotates more freely and suits an arc. An arc player using a face-balanced putter has to steer the face closed through impact, which adds inconsistency.

On a modular putter the balance point is not fixed. Moving the weight in the head's back rail shifts the centre of gravity, so the same head can be set square for a straighter stroke or given toe hang for an arc.

The principle is to match the putter to the stroke a golfer already has, rather than rebuilding the stroke to suit the putter. Putter toe hang is covered in more detail in its own guide.

What this means in practice

A curved putting stroke is normal and, for most golfers, unavoidable. The players who putt well under pressure are generally not those with the straightest strokes, but those whose putter matches whatever shape they have. Identifying your stroke arc and choosing a putter to suit it removes a source of inconsistency that practice alone does not fully resolve.

The at-home questionnaire translates a golfer's stroke inputs into the lie, shaft position, and weight setup that fit them.

Find your stroke match

FAQ

Is straight back, straight through putting bad?

Not bad, but difficult to produce naturally, because a leaning shaft swinging from the shoulders tends to travel on an arc. Forcing it dead straight usually adds hand and shoulder manipulation, which introduces inconsistency.

How do I know if I have an arc putting stroke?

Film several putts from above. If the head curves inside the target line on the backswing and the face opens slightly, the stroke has an arc, which is the case for most golfers. A gentle curve is a slight arc and a pronounced one is a strong arc.

Why does the putter move on an arc?

Because the shaft leans toward the golfer at address and the stroke pivots around the shoulders. A tilted object swinging from a fixed point cannot move in a straight line, so it travels on an arc.

Do the pros putt straight back or on an arc?

Most tour players have some arc, and very few are genuinely straight back and through. What they tend to share is a putter matched to their stroke shape, rather than a particular shape itself.

Does eye position affect stroke type?

It is a useful indicator. Eyes set inside the ball tend to accompany more arc, and eyes over the ball a straighter path. It is best confirmed on video rather than relied on alone.