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Calcimator

Anchor Line (Rode) Calculator

Calculate the proper anchor line scope, chain length, and rope length based on water depth and conditions.

Inputs

ft

Results

Scope Ratio

7:1

Total Rode Needed

133 ft

Chain Length15 ft
Rope Length118 ft
Depth + Freeboard19 ft
Minimum Scope7:1
Swing Radius153 ft

Scope Ratio

7:1

Total Rode Needed

133 ft

How to Use This Calculator
  1. Start by filling in the input fields below. Results update instantly as you type, so you can experiment with different values to see how they affect the outcome.
  2. Water Depth — Depth of water at the anchoring location in feet. Accepts values from 1 ft to 300 ft (default: 15 ft).
  3. Weather Conditions — Expected weather conditions while anchored. Choose from: Calm (light wind), Moderate (15-25 kt wind), Storm (25+ kt wind). default: 2.
  4. Rode Type — Type of anchor rode setup on your boat. Choose from: All Chain, All Rope (with chain leader), Chain + Rope Combo. default: 3.
  5. Once all inputs are set, review your results in the Results panel. Here's what each output means:
  6. Scope Ratio — shown as a numeric value. This is the primary result of this calculator.
  7. Total Rode Needed — shown as a numeric value. This is the primary result of this calculator.
  8. Chain Length — shown as a numeric value.
  9. Rope Length — shown as a numeric value.
  10. Depth + Freeboard — shown as a numeric value.
  11. Minimum Scope — shown as a numeric value.
  12. Swing Radius — shown as a numeric value.
  13. Explore the related calculators below if you need deeper analysis or want to approach this topic from a different angle.
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