Anchor Size Calculator
Anchor Weight
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Rode Length
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Scope Ratio
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Chain Needed
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Choosing the Right Anchor Size
About 1 lb per foot for modern anchors. Storm conditions: double size. Traditional anchors need more weight.
Scope = rode length / depth. Min 5:1 calm, 7:1 moderate, 10:1 storm. Greater scope improves holding.
Chain leader equal to boat length helps rode lie flat, improving holding and preventing chafe.
Frequently Asked Questions
What scope?
5:1 for lunch hook calm weather. 7:1 standard overnight. 10:1+ for storms.
Best anchor type?
New-generation (Rocna, Mantus) best per pound. Plow (CQR, Delta) good all-rounders.
Need chain?
Yes, at least one boat length. Adds weight, resists chafe, helps anchor set.
Carry two anchors?
Yes, primary and secondary of different types for different bottom conditions.