Fast, Accurate Measurements Up to 165 Feet — Built for the Jobsite
The Spectra Precision QM20 Laser Distance Measure is the go-to measuring tool for contractors who need instant, reliable readings without wrestling with a tape measure. Covering a maximum range of 165 feet with an accuracy of ±1/8 inch, the QM20 is engineered for the daily demands of residential construction, remodeling, and light commercial work. Whether you're shooting room dimensions solo or calculating square footage on the fly, the QM20 delivers results in seconds — saving you time and eliminating costly measurement errors.
Jobsite-Ready Performance for Contractors
The QM20 sits in the middle of Spectra Precision's Quick Measure lineup, offering a meaningful step up from entry-level units while keeping the price accessible. Its compact, pocketable form factor means it goes wherever you go, and the intuitive single-button operation keeps the learning curve flat. The backlit display is easy to read in dim interior spaces, and the built-in reference point switching lets you measure from the front or rear of the tool to accommodate different mounting and placement scenarios. Continuous measurement mode is ideal for finding minimum or maximum distances in irregular spaces — a common need when sizing doors, windows, and built-ins.
Key Specifications
- Measuring Range: 1.6 ft to 165 ft (0.5 m to 50 m)
- Accuracy: ±1/8 inch (±3 mm)
- Measurement Units: Feet, inches, meters
- Display: Backlit LCD
- Measurement Modes: Distance, continuous, area, volume, Pythagorean
- Reference Point: Front edge or rear edge selectable
- Battery: 2x AAA batteries
- Battery Life: Up to 5,000 measurements per set
- IP Rating: IP54 dust and splash resistant
- Operating Temperature: 32°F to 104°F (0°C to 40°C)
- Dimensions: Approximately 4.3 x 1.6 x 1.0 inches
- Weight: Approximately 3.5 oz
Key Features
- One-button operation for fast, no-fuss measurements
- Backlit LCD display for clear readings in low-light conditions
- Pythagorean mode calculates indirect distances without line of sight
- Area and volume calculation built in — multiply measurements instantly
- Continuous measurement mode for sweeping minimum/maximum readings
- Front and rear edge reference switching for versatile placement
- Memory recall stores last measurements for easy reference
- IP54-rated housing resists dust and job site moisture
- Compact, shirt-pocket size — always within reach
Job Applications
Interior Room Measuring: Take accurate wall-to-wall, floor-to-ceiling, and diagonal measurements solo — no helper needed. The area and volume modes automatically calculate square footage and cubic footage for flooring, drywall, and HVAC estimates.
Window and Door Rough Openings: Use Pythagorean mode to measure indirect distances or confirm square by shooting diagonals. Get consistent readings every time, even on hard-to-reach openings.
Exterior Layout and Setbacks: Shoot distances across driveways, yards, or building exteriors up to 165 feet. Ideal for verifying setbacks, lot lines, and site dimensions on residential projects.
Material Estimating: Feed measurements directly into the built-in area and volume calculator to produce instant material quantity estimates for flooring, paint, concrete, and more — right on the tool, in the field.
Compatible Accessories
- Spectra Precision Carry Case for Laser Measures
- Replacement AAA Batteries (Bulk Pack)
- Laser Target Cards for Bright Conditions
- Universal Tripod Adapter for Laser Measures
Related Guides
- How to Choose the Right Laser Distance Measure for Your Work
- Laser Measure vs. Tape Measure: When to Use Each
- Using Pythagorean Mode for Indirect Distance Measurement
- Top Spectra Precision Tools for Residential Contractors
Frequently Asked Questions
- Can the QM20 be used outdoors in bright sunlight?
- The QM20 laser is visible in most outdoor conditions, but like all red-laser distance meters, performance in direct bright sunlight at maximum range can be reduced. For best results outdoors, use the included or optional laser target cards to improve dot visibility, or measure during early morning and overcast conditions. Most contractors find the 165ft range fully usable for typical residential exterior work.
- Does the QM20 measure in both feet and meters?
- Yes. The QM20 supports measurement output in feet/inches, decimal feet, and meters. You can switch between units directly on the device to match the requirements of your project or plans.
- What is the difference between the QM20 and the QM40?
- The QM40 is Spectra's longer-range model with an extended measurement range compared to the QM20's 165-foot capability. The QM20 is the better value for contractors focused on residential interiors and standard exterior measurements, while the QM40 suits larger commercial spaces or longer-range layout work.
- Is the QM20 covered by a warranty?
- Yes. The Spectra Precision QM20 is backed by Spectra Precision's standard warranty. Express Tools is an authorized Spectra Precision dealer, so all units sold through our store qualify for full manufacturer warranty support. Contact us or Spectra Precision directly for warranty service details.
