What this calculator does
Hammock hang angle works out ridgeline length and hang-point drop for a comfortable hammock sag between two anchors. Enter your own figures above and the answer updates as you type: nothing is fixed in the code, so the result reflects exactly the numbers you supply.
The formula this calculator evaluates is printed under the tool and explained below, so you can check the working by hand or reuse it in a spreadsheet.
The formula
FormulaRidgeline ≈ 0.83 × anchor distance (the "83% rule"); hang-point drop = (anchor distance / 2) × tan(strap angle)
The inputs explained
| Field | What to enter |
|---|---|
| Distance between anchors (m) | A number, measured in m. Starts at 4. |
| Strap angle from horizontal (°) | A number, measured in °. Starts at 30. |
Worked examples
Every figure in the tables below is produced by this page’s own calculator at build time, so the numbers and the tool always agree. Select any row to load that scenario.
How the answer changes with distance between anchors
Every other input is held at the calculator’s starting values while distance between anchors varies. Select any row to load that scenario into the calculator.