Solve hypotenuse, rise, run, slope, and triangle details. Export tables, plot geometry, and verify inputs. Designed for homework, layouts, ramps, grading, and field checks.
The graph updates after a valid calculation.
| Case | Rise | Run | Side Length | Angle | Use Example |
|---|---|---|---|---|---|
| Ramp A | 3 | 4 | 5 | 36.87° | Basic training triangle |
| Roof B | 6 | 8 | 10 | 36.87° | Scaled roof framing check |
| Layout C | 5 | 12 | 13 | 22.62° | Field layout verification |
| Path D | 8 | 15 | 17 | 28.07° | Route distance estimate |
| Grade E | 9 | 40 | 41 | 12.68° | Grading and alignment review |
This calculator uses the right triangle relation:
side² = rise² + run²
When rise and run are known, the side length is:
side = √(rise² + run²)
When side and run are known, the rise is:
rise = √(side² − run²)
When side and rise are known, the run is:
run = √(side² − rise²)
The angle is found with:
angle = arctan(rise / run)
The area is:
area = 0.5 × rise × run
The perimeter is:
perimeter = rise + run + side
This page calculates a right triangle side length from rise and run, then expands the output into slope, angle, area, and perimeter. That makes it useful for students, estimators, builders, survey helpers, grading checks, and ramp planning.
It also works in reverse modes. If the hypotenuse and one leg are already known, the calculator finds the missing rise or run. The result table, graph, and export tools make record keeping easier during reviews.
Because the page keeps inputs, units, and precision together, it supports fast comparison between scenarios. You can test several triangle layouts, save results, and verify whether the geometry stays consistent with the Pythagorean relation.
Rise is the vertical leg. Run is the horizontal leg. The calculated side length is the diagonal of the right triangle.
Yes. Choose the mode for side and run. The calculator rearranges the right triangle formula and returns the missing rise.
Yes. Choose the mode for side and rise. The page calculates the missing horizontal leg using the same triangle relation.
The angle helps interpret steepness. It is useful for ramps, roof layouts, path planning, grade checks, and classroom geometry work.
The shape becomes a degenerate right triangle. The diagonal equals the rise, and the slope ratio is undefined because division by zero is not allowed.
Yes. The page includes CSV export for spreadsheets and PDF export for printable reports or saved calculation records.
Yes. Enter a unit label such as ft, m, cm, or in. The calculator displays that label throughout the result set.
No. It also helps with ramps, grading, framing, route estimates, layout checks, and any task involving right triangle distances.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.