Angle Measurement Guides
Practical tutorials and calculators for carpentry, geometry, roofing, and digital photo measurement.
How to Measure a 45-Degree Angle
Learn how to measure and verify a 45-degree angle on wood, trim, or images using our free online protractor.
Construction & MathHow to Measure a 90-Degree Angle
Step-by-step guide to measuring 90-degree right angles on walls, tiles, and digital photos.
Roofing & BuildingRoof Pitch Angle Guide & Pitch-to-Degrees Converter
Convert roof pitch (e.g. 4/12, 6/12) to exact degrees and measure roof slope from ground photos.
Building CodeStair Stringer Incline & Angle Measurement
Calculate stair incline angle degrees from step rise and run. Ensure IRC building code compliance.
GeometryHow to Measure an Obtuse Angle (90° to 180°)
Identify and measure obtuse angles between 90 and 180 degrees accurately using an online protractor.
Advanced GeometryHow to Measure a Reflex Angle (180° to 360°)
Step-by-step instructions for measuring reflex angles between 180 and 360 degrees in 360° mode.
WoodworkingMiter Saw Angle Calculator for Woodworking
Calculate miter and bevel saw angles for 45°, 60°, and out-of-square corner cuts.