Best Metric Depth Gauges of 2026

Brian Howie Avatar
Brian Howie
Last Updated: Jan 10, 2026

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Metric depth gauges are essential tools for accurately measuring the depth of holes, slots, and other recesses in a wide range of materials. These gauges come in various shapes and sizes, but they all function by using a calibrated rod or blade that can be extended or retracted to measure the depth of a surface. They are commonly used in woodworking, metalworking, and other precision industries where exact measurements are crucial. Metric depth gauges are available in analog and digital versions, with the latter offering more precise measurements and easier readings. They are durable, easy to use, and a must-have for anyone who needs to measure depths with accuracy.

At a Glance: Our Top Picks

iGaging 0-4" Digital Depth Gauge SnapDepth Cover #TOP 1
iGaging 0-4" Digital Depth Gauge SnapDepth
ftb score rating icon 9.9
AI 6" Depth Gauge Cover #TOP 2
AI 6" Depth Gauge
ftb score rating icon 9.8
RIVERWELD Fillet Weld Set Gauge Cover #TOP 3
RIVERWELD Fillet Weld Set Gauge
ftb score rating icon 9.6

Top 10 Metric Depth Gauges

#TOP 1

iGaging 0-4" Digital Depth Gauge SnapDepth

35-0904
iGaging 0-4" Digital Depth Gauge SnapDepth Cover
iGaging 0-4" Electronic Digital Depth Gauge SnapDepth 0.0005" Inch/Metric/Fractions Tire Tread Gage

The iGaging 0-4" Digital Depth Gauge SnapDepth is a versatile tool that includes 1" and 2" interchangeable depth bars to extend the rod to 2", 3" or 4". It has 3-reading functions: inch, metric, and fractional with a reading of 0.0005" / .01mm / 1/64. The spring loaded movement makes it easy to use as an indicator or depth gage.

What We Like
Versatile with interchangeable depth bars
3-reading functions for convenience
Accurate with precise readings
#TOP 2

AI 6" Depth Gauge

AI
AAA-206
AI 6" Depth Gauge Cover
6" / 150 MM DEPTH GAUGE METRIC & IMPERIAL STANDARDS - ENGINEERING

The AI 6" Depth Gauge is a versatile tool used for quickly obtaining measurements of holes or grooves. With its adjustable rule, you can easily set the desired depth and lock it into position using the knurled nut. The gun metal finished base and steel rule ensure durability and accuracy. The head cut out on one side allows for precise measurements, making it easier to get accurate readings. Whether you're an engineer or a DIY enthusiast, this depth gauge is an essential tool for precise measurements. The AI 6" Depth Gauge is reliable, convenient, and built to last.

What We Like
Adjustable depth measurement
Durable gun metal finish
Precise and accurate measurements
#TOP 3

RIVERWELD Fillet Weld Set Gauge

MG-11
Silver
RIVERWELD Fillet Weld Set Gauge Cover
RIVERWELD 7piece Fillet Weld Set Gage Rl Gauge Depth Gauges Welding Inspection Test Ulnar Metric & Inch MG-11 with Markings on Both Sides Checking Fillet Leg and Throat Size

RIVERWELD Weld Gauge Set is a versatile tool for measuring Fillet Weld Leg, Throat, and Theoretical Throat in both Metric and Inch units. Made of durable stainless steel, this gauge features markings on both sides for easy reading. The Fillet Weld Set Gauge helps you accurately check weld sizes, ensuring your welding meets specifications and standards. With this tool, you can quickly and precisely inspect welds, saving time and effort in your welding projects.

What We Like
Versatile Weld Measurement
Durable Stainless Steel
Markings on Both Sides
#TOP 4

AD INTERNATIONAL 6" Depth Gauge

364786
Black
AD INTERNATIONAL 6" Depth Gauge Cover
6" (150mm) Depth Engineering Gauge Metric & Imperial Standards

The AD INTERNATIONAL Depth Gauge is a versatile tool designed for engineers and DIY enthusiasts. With its hardened stainless steel head and locking nut, this gauge offers durability and precision. The accurate stainless steel rule allows for accurate measurements, making it a reliable tool for various projects. Whether you are working on woodworking, metalworking, or any other engineering tasks, this depth gauge will help you achieve accurate and consistent results. Its 6" (150mm) size provides sufficient depth range for most applications. Additionally, the fast shipping ensures that you can start using the gauge as soon as possible. Overall, the AD INTERNATIONAL Depth Gauge is a must-have tool for anyone in need of accurate depth measurements.

What We Like
Durable
Precise
Versatile
#TOP 5

BUYOHLIC Depth Gauge 6" Stainless Steel

45435
Metallic
BUYOHLIC Depth Gauge 6" Stainless Steel Cover
Buyohlic Engineer's Depth Gauge Cum Ruler Metric & Imperial 6"/ 150 mm

The BUYOHLIC Depth Gauge is designed for easy and precise depth measurements. Its compact and lightweight build makes it easy for you to carry and use both in the workshop and on the go. The secure locking screw ensures the gauge stays in place while you take your measurement, preventing any accidental shifts for better accuracy. With a smooth sliding mechanism, you can quickly adjust the gauge to the exact depth needed, making it user-friendly whether you're a beginner or a pro. This tool is perfect when you need reliable, precise measurements in various projects.

What We Like
Compact and lightweight design
Secure locking screw
Easy-to-use sliding mechanism
Accurate and precise measurements
#TOP 6

RIVERWELD MG-11 7-Piece Fillet Weld Gauge Set

MG-11 Rl Gauge Both sides
Silver
RIVERWELD MG-11 7-Piece Fillet Weld Gauge Set Cover
RIVERWELD 7piece Fillet Weld Key Chain Set Gage Rl Gauge Depth Gauges Welding Inspection Test Ulnar Metric & Inch MG-11 with Markings on Both Sides Checking Fillet Leg and Throat Size

The RIVERWELD Fillet Weld Gauge is a handy tool designed to help you accurately measure welds. It includes seven different gauges that allow you to check the size of fillet weld legs, throats, and theoretical throats, ensuring your welds meet quality standards. The gauges provide measurements in both metric and inch units, giving you flexibility no matter your project requirements. Made from durable stainless steel, this set is built to last and resist wear, making it a reliable companion for your welding inspections.

What We Like
7-piece gauge set
Measures fillet weld leg and throat
Dual metric and inch units
Durable stainless steel
#TOP 7

RIVERWELD 7piece Fillet Weld Set Gage Rl Gauge Depth Gauges Welding Inspection Test Ulnar Metric & Inch

RL gauge
Silver
RIVERWELD 7piece Fillet Weld Set Gage Rl Gauge Depth Gauges Welding Inspection Test Ulnar Metric & Inch Cover
RIVERWELD 7 Piece Fillet Weld Set Gage MG-11 Rl Gauge Depth Gauges Welding Inspection Test Ulnar Metric & Inch with Markings on Both Sides Checking Fillet Leg and Throat Size

The RIVERWELD Fillet Weld Set Gage is a versatile tool designed for welding inspection and testing. With its 7piece set, it allows you to accurately measure the depth of fillet welds. The RL gauge feature enables you to determine the proper alignment of the welds, ensuring high-quality results. This tool caters to both metric and inch measurements, making it suitable for a wide range of welding projects. Crafted from stainless steel, it offers durability and longevity. The RIVERWELD Fillet Weld Set Gage is a convenient and reliable tool that provides precise measurements, helping you achieve professional welding outcomes.

What We Like
Versatile
Precise measurements
Durable stainless steel
#TOP 8

Fowler 52-130-012-0 Dial Depth Gage

52-130-012-0
0-12"/0-300mm
Fowler 52-130-012-0 Dial Depth Gage Cover
Fowler 52-130-012-0 Inch/Metric Dial Depth Gage, 0-12"/0-300mm Range

The Fowler Dial Depth Gage offers a durable design with its hardened stainless steel construction, ensuring long-lasting use and resistance to wear. It includes a positive locking screw that helps you securely hold your measurement in place, preventing any accidental changes. The convenient thumbroll allows you to quickly adjust the settings, making your measuring tasks faster and smoother. Additionally, the beam is designed with a width of .630 inches and a thickness of .128 inches, providing you with a sturdy and reliable base for accurate depth readings. This tool is ideal for anyone needing precise and easy-to-use depth measurements.

What We Like
Hardened stainless steel
Positive locking screw
Quick thumbroll adjustment
Sturdy beam design
#TOP 9

iGaging Multi Gauge Snap Check Pro

34-0907
iGaging Multi Gauge Snap Check Pro Cover
iGaging Multi Gauge Snap Check Pro Height/Depth Gauge 0-2" Inch/Fractional/Metric

The iGaging Multi Gauge Snap Check Pro is a depth gauge that offers 3 scales in inch, fractional inch, and mm. It features a fine adjustment knob for easy calibration and a magnetic base with a smooth spring plunger. The gauge has a range of 0-2" with a resolution of 0.001"/0.01mm. Additionally, it comes with 3 anvils (Flat, Ball, and Extended Tip).

What We Like
Offers 3 scales in inch, fractional inch, and mm
Features a fine adjustment knob for easy calibration
Comes with 3 anvils (Flat, Ball, and Extended Tip)
#TOP 10

Fowler Xtra-Value Electronic Depth Gage

54-225-555-0
2.5”
Fowler Xtra-Value Electronic Depth Gage Cover
Fowler 54-225-555-0 Xtra-Value Electronic Depth Gage with 0-16"/406mm Measuring Range

The Fowler Electronic Depth Gage is a versatile tool that offers precision measurements with a 0-16"/406mm range. The large LCD display allows you to easily read measurements in inch/metric/fractions. You can adjust the display for zero setting and conveniently hold measurements with the spring-loaded button. With five rod extensions included, you can reach the full capacity of this depth gage. The set comes in a hardened plastic case for storage and protection, making it a convenient and reliable tool for your measuring needs.

What We Like
Precision measurements
Large LCD display
Adjustable zero setting
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What does depth gauge measure?

A depth gauge is an instrument for measuring depth below a reference surface. They include depth gauges for underwater diving and similar applications, and engineering instruments used to measure the depth of holes and indentations from a reference surface.

2. What is a depth gauge called?

depth finder, also called echo sounder, device used on ships to determine the depth of water by measuring the time it takes a sound (sonic pulse) produced just below the water surface to return, or echo, from the bottom of the body of water.

3. What is a depth gauge micrometer?

Depth micrometers take measurements of slots, steps, holes, and projections. They have a spindle that is adjusted by rotating a thimble until the rod/beam contacts the bottom of a hole being measured.

Editor's Notes

During our metric depth gauge research, we found 24 metric depth gauge products and shortlisted 10 quality products. We collected and analyzed 17,332 customer reviews through our big data system to write the metric depth gauges list. We found that most customers choose metric depth gauges with an average price of $12.44.

The metric depth gauges are available for purchase. We have researched hundreds of brands and picked the top brands of metric depth gauges, including iGaging, AI, RIVERWELD, AD INTERNATIONAL, BUYOHLIC. The seller of top 1 product has received honest feedback from 121 consumers with an average rating of 4.6.

Written by
Brian Howie Avatar

Brian Howie is a content writer and senior industrial designer. After graduation from Westminster College, he has been engaged in product design and manufacturing for 18 years. Brian Howie has always found great pleasure in designing industrial products and sharing his ideas and experience online.