Calculators
Free Off-Road Recovery Calculators
Every calculator here runs on the same sizing rules the guides cite, applied to whatever you enter rather than to a generic example. Each one shows the rule it used and links the manufacturer or standard it came from, so you can check the arithmetic instead of trusting a number a form handed you.
None of these replace your own gear's stamped rating. A calculator gives you the minimum a component needs to meet; the tag on the part in your hands is what actually governs.
Kit Builder
Recovery Kit Builder
Pick your vehicle and get a complete recovery kit sized to it, from rope and shackles through to a damper, with each item matched to its own sizing rule.
Kinetic Rope
Kinetic Rope Size Calculator
Enter your vehicle or its weight to get a diameter class and a minimum breaking strength target, plus the full published diameter chart by vehicle weight.
Snatch Block
Snatch Block Size Calculator
Enter your winch rating and pull configuration to get the minimum working load limit a block or recovery ring needs, including the doubled-line case.
Soft Shackle
Soft Shackle Sizing Calculator
Enter your rope or winch line breaking strength to get the minimum soft shackle strength that matches it, so the shackle is never the weak link.
Pull Force
Recovery Pull Force Calculator
Estimate the force a stuck-vehicle recovery needs, using I4WDTA's published method: surface, gradient, damaged wheels and its own safety margin, with every term shown.