A directory of precision mathematical calculators for geometric analysis, carpentry framing, building code compliance, and trigonometric unit conversion. Every tool runs pure client-side math with zero external server dependencies.
Convert degrees, radians, gradians, and turns
Convert between sexagesimal degrees, radians, and grads. Compute complementary, supplementary, and reflex angles alongside primary and reciprocal trigonometric ratios.
Solve triangles using SSS, SAS, ASA, AAS, and Right Triangle rules
Solve missing interior angles, side lengths, area, and perimeter with step-by-step mathematical proofs utilizing the Law of Sines and Law of Cosines.
Convert x:12 pitch ratios to degrees and slope percentage
Determine rafter angles, slope percentages, common rafter lengths, and plumb/seat cut angles based on IRC building code underlayment specifications.
Evaluate stringer slope against IRC & IBC building codes
Check physical riser and tread compliance under residential (IRC R311.7.5) and commercial (IBC 1011.5.2) limits alongside the Blondel stride formula.
Miter saw blade angles for regular polygon joints
Calculate miter and bevel saw blade angles for multi-sided frames (3 to 12 sides) with corner joint angle breakdowns.
Convert degrees to percent slope and rise:run ratios
Calculate incline angles, civil grade percentages, elevation changes, and verify ADA ramp wheelchair accessibility slopes (1:12).
Rule-of-thumb seasonal tilt estimates by latitude
Estimate optimal fixed panel tilt angles for winter, summer, and spring/autumn based on your geographic latitude.
If you need to measure an angle directly from an image, photo, or live screen instead of calculating from numerical dimensions, visit our Interactive Angle Finder or our Online Protractor. On mobile devices, use the Phone Inclinometer to measure physical surfaces using your smartphone's internal motion sensors.