48" Rulers | McMaster-Carr

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35 Products

About High-Quality Rulers

What separates a throwaway ruler from one you’ll keep for decades, which type is best for everyday use, and how to compare materials.

Rulers

Horizontal Rulers

Rulers

Your go-to rulers for everyday measuring—available with certificates traceable to NIST

14 products

High-Accuracy Rulers

Our most accurate rulers, with tolerances tight enough for machining detailed parts

9 products

Easy-Read Rulers

Measure where it's too bright or too dark to read a standard metal ruler

4 products

Center-Finding Rulers

Quickly locate the center of workpieces without any math

1 product

Rulers for Cutting

Prevent nicking your fingers while measuring and cutting straight lines

1 product

Circumference-Measuring Rulers

Find the circumference of duct, pipe, and other cylindrical objects without doing math

1 product

Vertical Rulers

Measure height and depth without reading sideways

2 products

Other Products

Staff Gauges

Typically mounted to walls and tanks for measuring the level of liquids, such as water, fuel, and oil

1 product

Levels

Ensure surfaces are completely horizontal or vertical

2 products