How Accurate Are Laser Levels? A Tradie’s Insight

By Tom Summerfield | Updated 7 November 2023

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As a tradie, I've always relied on laser levels to help me achieve precise alignment and leveling for various projects. However, many DIYers and fellow tradespeople often ask me, "how accurate are laser levels?" In this blog post, I'll share my experience and insights on laser level accuracy and discuss what factors can affect their performance.

How accurate are laser levels?

When it comes to laser level accuracy, it's essential to understand that not all laser levels are created equal. Different models offer different levels of accuracy, usually expressed as a deviation over a given distance (e.g., ±3 mm/m). Generally, the smaller the deviation, the more accurate the laser level is. Professional-grade laser levels, like those from Bosch and DeWalt, typically offer higher accuracy than budget models, but they also come at a higher price point.

So the answer is, the higher quality the more accurate they are over a greater over greater distance, but cheap levels will also be accurate at close distances.

Factors Affecting Laser Level Accuracy

Several factors can impact a laser level's accuracy, including:

Quality and Design

High-quality laser levels with robust designs are more likely to maintain their accuracy over time, even in harsh job site conditions. Ensure you invest in a reputable brand that uses durable materials and has a solid reputation for quality.


Laser levels need regular calibration to ensure they maintain their accuracy. Check the manufacturer's recommendations for calibration intervals and follow them diligently. It's also essential to handle your laser level carefully to avoid dropping or jarring it, as this can affect its calibration.

Environmental Factors

Temperature, humidity, and air quality can also impact a laser level's accuracy. Always follow the manufacturer's guidelines for operating temperature and humidity ranges, and keep the laser level clean and free from dust and debris.

Comparing Laser Levels and Traditional Tools

Compared to traditional leveling tools like bubble levels and plumb bobs, laser levels are significantly more accurate and efficient. As stated by Pro Tool Reviews, laser levels offer several advantages, including greater precision, faster setup, and the ability to work over longer distances.

Choosing the Right Laser Level

To make the most of your laser level's accuracy, it's crucial to choose the best laser level model for your needs. Consider factors such as your budget, the type of projects you'll be using it for, and the desired accuracy. For most DIYers and tradespeople, a self-leveling cross-line laser level with an accuracy of ±3 mm/m or better should suffice. However, for more demanding applications, you might need a model with higher accuracy, such as a rotary laser level.


In conclusion, laser levels are highly accurate tools that have revolutionized leveling and alignment tasks for both tradies and DIY enthusiasts. By investing in a quality laser level and maintaining it properly, you can significantly improve the precision and efficiency of your work. To learn more about laser levels and their applications, check out this comprehensive guide on laser levels by Better Homes & Gardens.