Best Starrett Protractors of 2025

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Protractors are essential tools for accurately measuring and marking angles in a wide range of industries, including construction, engineering, and metalworking. Starrett is a well-known brand that produces high-quality protractors that are trusted by professionals worldwide. Their protractors come in a variety of styles and sizes, from simple plastic models to more advanced digital versions. Whether you're looking to measure angles for a DIY project or need precise readings for commercial work, Starrett protractors are a reliable choice that won't let you down.
At a Glance: Our Top Picks
Top 10 Starrett Protractors
Starrett 505A-7 ProSite Protractor for Accurate Cuts
The Starrett ProSite Protractor is designed to simplify your measuring tasks. It eliminates error-prone calculations when making meter cuts, ensuring precision in your work. Regardless of whether you hold it upside down or backwards, the readings remain accurate, saving you time and effort. The scale clearly indicates angles for both meter joints and single cuts, meaning you can work quickly and reduce waste. This tool is ideal for carpenters, plumbers, and all building trades, offering significant convenience in your projects.
Starrett H33-1224 Protractor Head for Squares
The Starrett H33-1224 Protractor is crafted from forged hardened steel, ensuring durability and strength for your measurement tasks. Its smooth black enamel finish not only gives it a sleek appearance but also protects it from wear and corrosion, making it suitable for long-term use. With a blade size of 12" to 24" (300mm to 600mm), it provides versatility for various projects. This protractor head is ideal for accurately measuring angles, helping you achieve precise results in your woodworking or metalworking tasks.
Starrett 11MH-300 Cast Iron Combination Square
The Starrett 11MH-300 Square is an essential tool for precise measurements and layout work. Its reversible lock bolt allows you to secure the blade easily, enhancing convenience during use. The integrated scriber enables you to mark lines accurately, making it ideal for detailed woodworking projects. Additionally, the spirit level helps ensure that your measurements are perfectly aligned, giving you confidence in your work. With a hardened steel blade, this combination square is built for durability, ensuring it serves you well for years to come.
Starrett C183 Steel Protractor with Rectangular Head
The Starrett C183 Protractor is an essential tool for anyone needing precision in their work. With double graduations from 0-180 degrees, you can read angles directly and easily, saving you time and reducing errors. Its durable steel construction ensures longevity, making it a reliable choice for repeated use. The flat back design allows for straightforward measurements, while the lock nut feature keeps the blade securely in place, enhancing your accuracy and efficiency in various tasks.
Starrett 505A-12 ProSite Dial Protractor
The Starrett ProSite Protractor is designed to prevent calculation errors, making it easier for you to produce accurate mitre joints and single cuts. With its laser engraved scale, you can set your circular saw to the angle displayed, ensuring 100% accuracy every time. Whether you are working upside down or backwards, rest assured that the reading remains correct. Made from durable aluminium and featuring a Teflon "O" ring, this tool guarantees smooth and precise operation, enhancing your efficiency on the job.
Starrett C434ME-300 Protractor and Square Set
The Starrett C434ME-300 Set is designed to save you time with its easy-to-use templates and software. You can create glossy labels that give your files a premium finish, making them visually appealing. This product is also ideal for producing brochures and catalogues, ensuring your materials stand out. The colour laser labels are made from photo quality material, ensuring brilliant colours and sharp text, enhancing the overall quality of your presentations.
Starrett 505P-7 Protractor and K53M-350-S Square
The Starrett Protractor and Try Square are essential tools for precision in carpentry and construction. The protractor helps you prevent calculation errors when creating mitre joints or making single cuts, ensuring that your readings are always accurate, even when viewed upside down or backwards. You can easily set your circular saw to the angle indicated on the laser engraved scale, guaranteeing 100% accuracy. Made from durable hardened plastic, it offers a smooth operation similar to aluminium models, making it a reliable choice for tradespeople.
Starrett CP505A-12 ProSite Combination Protractor Tool
The Starrett ProSite Protractor is a versatile tool designed for precision in measuring angles. You can easily transfer miter and single cut readings directly to your miter saw, enhancing your cutting accuracy. The protractor feature includes two scales, allowing you to determine angles from 0-180 degrees. Additionally, with the tool face down, you can quickly reference common roof pitches, making it ideal for roofing projects. This combination of features provides convenience and accuracy for all your woodworking needs.
Starrett 12ME-300 Non-Reversible Bevel Protractor
The Starrett Bevel Protractor is designed for precise angle measurement. Its non-reversible design allows for direct reading of angles and supplementary angles, making it easier for you to take accurate readings. With double graduations ranging from 0 to 180˚, you can effortlessly read angles above or below the blade. The blade measures 12 inches (300 mm) and features clear graduations on both sides, ensuring you have the right measurements at hand. Plus, the spirit level helps you confirm if your reference surface is level, enhancing your overall accuracy.
Starrett 47 Universal Bevel with 6" Blade
The Starrett 47 Universal Bevel features both offset and straight slots in the blade, allowing you to take precise measurements with ease. Its wide variety of adjustment and angle settings means you can customise it for any project. You can even set it to duplicate an angle from a master, ensuring accuracy in your work. Additionally, the design allows the stock to lie flat on the work or paper, thanks to the recessed head of the clamping bolt, making your tasks more manageable.
During our Starrett protractor research, we found 13 Starrett protractor products and shortlisted 10 quality products. We collected and analyzed 6,005 customer reviews through our big data system to write the Starrett protractors list. We found that most customers choose Starrett protractors with an average price of £201.41.
The Starrett protractors are available for purchase. The top 10 picks range in price from a low of £33.00 to a high of £448.00, find the one that fits your budget.

Jennifer Fraser is a licensed contractor specializing in sales, maintenance, and kitchen, bathroom, and home appliances, tools, and utilities. She owns a store in Leeds where you can get any home and tool appliance. Jenny has a degree in literature, but she combines her knowledge and experience with her degree to publish DIY articles on solving home appliances issues to keep up the family enterprise.