Screwdriver Size Chart

Selecting the proper screwdriver size is essential for every DIY endeavor. Knowing the distinctions between various screwdriver sizes can significantly diminish both time spent and headaches encountered in your upcoming project. By understanding the significance of screwdriver size, you can ensure smoother and more efficient outcomes, leading to a more satisfying DIY experience overall.

Screwdriver Size Chart

Flat Head Screwdriver Sizes

0.8 mm
1 mm
1.2 mm
1.5 mm
1.8 mm
2 mm
3/32″2.5 mm
1/8″3 mm
3.5 mm
5/32″4 mm
4.5 mm
5 mm
7/32″5.5 mm
6 mm
1/4″6.5 mm

Hex Key Screwdriver Sizes

.7 mm
.9 mm
3/64″1.2 mm
1.3 mm
1.5 mm
1/16″1.6 mm
5/64″2 mm
3/32″2.4 mm
2.5 mm
7/64″2.8 mm
3 mm
1/8″3.2 mm
9/64″3.5 mm
5/32″4 mm
11/64″4.4 mm
4.5 mm
3/16″4.8 mm
5 mm
13/64″5.2 mm
7/32″5.5 mm
15/64″6 mm
1/4″6.4 mm
7 mm
5/16″8 mm
9 mm
3/8″9.5 mm
10 mm
1/2″12.7 mm

Robertson Screwdriver Sizes

Black#312, 1/4″
Brown#45/16″, 3/8″

Phillips Screwdriver Sizes

#00001 mm
#0001.5 mm
#002 mm
#02.5 mm0-1
#13 mm2-4
#23.5 mm5-9
#35 mm10-14, 16
#46 mm18, 20, 24
#58 mm5/8″ and 3/4″ (machine screws)

Torx Screwdriver Sizes

T1.031″.81 mm
T2.036″.93 mm
T3.046″1.10 mm
T4.050″1.28 mm
T5.055″1.42 mm
T6.066″1.70 mm
T7.078″1.99 mm
T8.090″2.31 mm
T9.098″2.50 mm
T10.107″2.74 mm
T15.128″3.27 mm
T20.151″3.86 mm
T25.173″4.43 mm
T27.195″4.99 mm
T30.216″5.52 mm
T40.260″6.65 mm
T45.306″7.82 mm
T50.346″8.83 mm
T55.440″11.22 mm
T60.519″13.25 mm
T70.610″15.51 mm
T80.690″17.54 mm
T90.784″19.92 mm
T100.871″22.13 mm

Why Screwdriver Size Matters

Matching the screwdriver size to screw heads is paramount for successful DIY projects. This alignment ensures a snug fit and reduces the risk of stripping screws or causing damage to materials. Additionally, using the correct screwdriver size guarantees the application of proper torque, resulting in secure fastening and durable constructions.

Transitioning seamlessly between these points underscores the critical role that screwdriver size plays in achieving project success, while also emphasizing the repercussions of overlooking this crucial detail.

Types of Screwdriver Heads

Exploring the diverse landscape of screwdriver head types reveals a variety of options tailored to different needs. Among the most common are flathead, Phillips, Robertson, Torx, and hex heads, each with its own distinct features and applications. Understanding these nuances allows for informed decision-making when selecting the appropriate screwdriver size for optimal performance.

Transitioning between the characteristics of each head type elucidates the importance of considering factors such as precision, torque, and compatibility, thereby underscoring the significance of a well-informed approach to utilizing the Screwdriver Size Chart.

Screwdriver Size Chart

Presenting a comprehensive screwdriver size chart is essential for facilitating informed decision-making in DIY projects. This chart encompasses various head types, such as flathead, Phillips, Robertson, Torx, and hex, along with their corresponding screwdriver sizes. The organized layout ensures easy reference during projects, enhancing efficiency and accuracy.

Additionally, incorporating illustrations or diagrams offers visual aids that simplify the understanding of screwdriver size selection, making the chart accessible to individuals of all skill levels. By prioritizing clarity and usability, the Screwdriver Size Chart becomes an indispensable tool for navigating the complexities of screwdriver sizing, ultimately leading to successful project outcomes.

Determining the Correct Screwdriver Size

Accurately determining the correct screwdriver size is essential for smooth and successful DIY projects. To achieve this, several tips can be employed for accurately measuring screw sizes. Additionally, methods exist for identifying screwdriver size requirements even in the absence of explicit markings.

However, it’s crucial to be aware of common mistakes that should be avoided when selecting screwdriver sizes. By navigating through these considerations, DIY enthusiasts can confidently make informed decisions, ensuring that the Screwdriver Size Chart serves as a reliable resource for achieving precision and efficiency in their projects.

Specialized Screwdriver Sizes for Unique Applications

Delving into specialized screwdriver sizes unveils tailored solutions for specific industries or tasks, catering to diverse needs and requirements. For instance, precision screwdrivers find their niche in electronics, offering delicacy and accuracy for intricate components. Similarly, automotive screwdrivers are indispensable for vehicle maintenance, equipped with features designed to tackle the unique challenges of automotive repair.

Transitioning seamlessly between these examples highlights the versatility and adaptability of screwdriver sizes, emphasizing the importance of considering specialized tools for optimal performance in various applications. As DIY enthusiasts navigate through the array of options presented in the Screwdriver Size Chart, understanding the role of specialized sizes becomes paramount in achieving professional results across different tasks and industries.

Tips for Maintaining Screwdriver Size Accuracy

Preserving screwdriver size accuracy is pivotal for consistent performance in DIY endeavors. Employing proper storage techniques shields screwdriver tips from wear and deformation, ensuring lasting precision. Additionally, integrating regular maintenance practices, such as cleaning and lubrication, extends the lifespan of screwdrivers, optimizing their functionality over time.

However, it’s crucial to recognize when to replace screwdrivers to safeguard against compromised accuracy and performance. By navigating through these considerations, DIY enthusiasts can uphold the integrity of their screwdrivers, maximizing the utility of the Screwdriver Size Chart for reliable and efficient project outcomes.

DIY Projects Requiring Various Screwdriver Sizes

Embarking on DIY projects illuminates the critical role of using the correct screwdriver size for achieving professional results. From assembling furniture to installing fixtures, each project necessitates meticulous attention to screwdriver size to ensure precision and durability. Transitioning seamlessly between these projects underscores the versatility of screwdriver sizes, highlighting their impact on project outcomes.

Moreover, providing step-by-step guides for each project emphasizes the significance of screwdriver size in navigating through challenges and achieving optimal results. As DIY enthusiasts engage in these projects, they gain a deeper appreciation for the importance of leveraging the Screwdriver Size Chart as a guiding resource, empowering them to tackle diverse tasks with confidence and proficiency.


In conclusion, screwdriver size stands as a linchpin in DIY projects, ensuring precision and efficiency. I encourage readers to utilize the provided screwdriver size chart as an invaluable reference tool, enabling informed decision-making. Armed with this knowledge, readers are empowered to tackle future projects confidently, equipped to navigate challenges and achieve professional results.


Q: Why is it important to match the screwdriver size to screw heads?
A: Matching screwdriver size to screw heads ensures a snug fit, reducing the risk of stripping screws or damaging materials, and ultimately leading to secure and durable fastenings.

Q: How can I accurately measure screw sizes?
A: To accurately measure screw sizes, use a caliper or ruler to gauge the diameter and length of the screw shaft, or refer to manufacturer specifications if available.

Q: What should I do if a screw doesn’t have explicit markings indicating its size?
A: If a screw lacks explicit markings, you can use trial and error with different screwdriver sizes, consult a screw size chart for approximate matches, or use thread pitch gauges to determine the screw size.

Q: How can I extend the lifespan of my screwdrivers?
A: To extend the lifespan of your screwdrivers, store them properly to prevent wear and deformation of the tips, perform regular maintenance such as cleaning and lubrication, and replace them when they show signs of wear or damage.

Q: Can I use the same screwdriver for different projects?
A: While some screwdrivers may have multiple uses, it’s generally recommended to use the correct screwdriver size for each project to ensure proper fit, torque, and avoid potential damage to materials or screws.