SlopeCalc
Calculate slope

Six modes · exact linear arithmetic

See the same slope in the notation you actually need.

SlopeCalc normalizes length units exactly, keeps signed uphill and downhill values, and labels trigonometric conversions as approximate.

Open the slope calculator

No account, upload, standards claim, backend, or generated result URL.

Three visible decisions

Choose a representation, keep the geometry straight, inspect precision

01

Choose what you know

Start from rise/run, percent, degrees, ratio, or solve for a missing length.

02

Use horizontal run

Do not substitute the inclined surface length for the horizontal projection.

03

Read exact and approximate labels

Linear rational results stay exact; tangent and arctangent carry ≈.

Focused geometric conversion

Useful notation without pretending to approve a design

  • Rise and horizontal run to percent slope.
  • Signed percent to approximate degrees.
  • Degrees to approximate percent and ratio.
  • Run and percent to exact rise.

Worked relationships

Check 5% and 8% with executable examples

Two examples connect inputs, exact linear results, approximate angles, and scope.
View examples

One slope, five representations

Make the geometry visible before using the number

Enter the representation you know and inspect the exact arithmetic, approximate trigonometry, units, and sign.

Open SlopeCalc