Slope vs non-slope rangefinders

What slope adds to a laser

Every golf laser measures the straight line distance to a target. A slope model adds an inclinometer that reads the angle up or down to the target, then calculates a plays-like distance: longer when the green is above you and shorter when it is below. Some models show both numbers together, others show one and let you switch.

The plays-like figure is useful because elevation changes are hard to judge by eye. A green on a bank can look closer than it plays, and a downhill par 3 often tempts golfers into one club too many. Our slope explainer shows the geometry with a worked example.

Slope and competition golf

Rule 4.3 of the Rules of Golf allows distance devices by default but does not allow you to measure elevation changes during a round. A slope laser is still allowed in competition as long as the slope function is off. That is why many slope models have an external switch or a clear mode indicator, so playing partners can see the device is in its legal mode.

In practice this means that on medal days a slope laser works exactly like a distance-only one. You pay for slope only in practice rounds, bounce games and holiday golf. Whether that is worth it depends on how much of your golf is non-competitive and how hilly your courses are. Our legal explainer covers the Rule in more detail.

Two lasers compared

The table compares a distance-only laser and a slope laser using the facts their listings state. Where a listing does not give a figure, we say so.

The Nikon is small, light and simple. First Target Priority shows the nearest target among several readings, which helps pick the flag out from trees behind it. The Bushnell adds slope with a switch you can see, a flashing ring and vibration when it locks on the flag, a magnet for the trolley frame and a higher weather rating. The extra features are what you pay for.

Compare slope lasers and how they switch off →

Who gains most from slope

Golfers who gain least are those who mostly play competitions on flat parkland courses, where slope readings would rarely differ much from the straight distance and would be switched off on medal days anyway. For them, a good distance-only laser, or a slope model they simply leave off, is enough.

• Golfers on hilly or links courses with raised greens and plateau tees.
• Players who play lots of social golf, practice rounds or holidays where slope can be used.
• Improving golfers who want to learn how much elevation changes each club.
• Golfers who already know their yardages well and want the extra detail.

What to check before buying either type

Whichever type you choose, the basics matter more than slope: a reliable flag lock with clear feedback, readable display in grey weather, a good eyepiece if you wear glasses and a size you will actually carry. A magnet is a real convenience if you use a trolley. If you choose slope, check how it is turned off and how the display shows the mode. Our mid-price laser guide lists both types.

Note:Makers describe golf lasers as eye-safe Class 1 products in normal use, but they warn against aiming at people or looking at the sun through the optics. Follow the manual.

Frequently asked questions

Is a slope rangefinder legal in competitions? Yes, as long as the slope function is switched off. Using slope readings during a competition round is a breach of Rule 4.3.

Is slope accurate? The angle and height maths is standard geometry. The plays-like figure uses each maker's own formula, so brands can differ by a few yards on the same shot.

Should a beginner buy slope? Not necessarily. A beginner gains more from knowing their basic yardages. Slope helps most once you know how far each club goes on flat ground.