📐 Protractor - Small Tool to Measure Angle Values

🔎 How to measure angles in mechanical images/screenshots?

Even with high-precision mechanical drawings, sometimes you need to quickly get an angle from a screenshot or photo. Just follow these 4 steps:

• 📸 Import file: Paste directly (Ctrl + V) after taking a screenshot, or click the upload button to select your image.
• 🎯 Locate vertex: Drag the red dot to the vertex where the two lines meet.
• 📏 Adjust rays: Drag the blue dots at the ends of the two red lines to align them with the angle edges in the image.
• ✅ Get Angle: The top toolbar displays the current measured angle in real-time. No manual calculation needed.

🌟 Features of the Online Protractor

Beyond basic measurement, the system automatically calculates 180° - current angle and 360° - current angle to help with complementary and supplementary angles. 🚀 Pure web version, works on mobile and desktop.

💻 How to measure object angles on PC or Mobile?

Our tool is cross-platform optimized for a smooth experience everywhere:

• On PC: Supports mice for precision dragging and large-screen display for high-res drawings.
• On Mobile: Touch-optimized. Take a photo and upload to get angle values quickly outdoors. 📱
• No Download: Web-based tool, no installation or plugins required.

💡 Where can you use a protractor?

This tool is useful in many professional fields:

• 🛠️ Machinery & Engineering: Measure tolerances in parts drawings or screenshots.
• 🗺️ Geography & Surveying: Measure deflection angles of roads or rivers on maps.
• 🎓 Education: Help teachers calibrate answers in geometry exercises.
• 🖥️ Web & UI: Measure rotation angles in UI mockups.
• 🎨 Daily Creativity: Measure tilt in photos or direction aid for navigation. ⛵