Marine Anchor Scope Calculator
Multiply your chosen scope by water depth plus bow height and your tide-rise allowance.
A QUICK WALKTHROUGH
How to use this tool
- Enter your scope ratio and all three height values.
- Calculate the result.
- Copy the report or download it as TXT.
Formula and units
Rode length = chosen scope × (water depth + bow height + tide-rise allowance). Scope must be positive; the three heights must be nonnegative.
Scope
Choose the ratio independently. No default or recommended scope is supplied. This is arithmetic from your values, not an assessment of anchoring safety, holding, seabed, weather or equipment. All heights must use the same metre units.
Local processing
Your entries stay in your browser. Copy and TXT export include the inputs, formula and scope.
GOOD TO KNOW
Common questions
How should I use the result?
Use it as an arithmetic estimate based on your supplied inputs.