Working Load Limit Calculator

Quick Answer

Use this calculator to total known WLL values for planning. It does not determine compliance.

What this calculator does

This tool adds up the WLL values you enter and displays a total. It is an educational planning aid to help you think through how much aggregate rated capacity your tiedown plan includes. It does not determine whether a load is legally secured.

Enter the WLL for each tiedown in the assembly. The calculator adds the values you provide. The result is only as accurate as the numbers you enter — use WLL values from manufacturer markings, equipment tags, or carrier-approved tables, not estimates or assumptions.

What this calculator cannot do

The calculator does not know whether any entered device is damaged, unmarked, or being used outside its rated application. It does not evaluate direct versus indirect tiedown credit, tiedown angle, placement requirements, edge protection, or any commodity-specific federal section.

A total that exceeds cargo weight does not mean the load meets the aggregate WLL requirement under the applicable federal rule. The rule specifies how WLL is credited for each tiedown type, and that math must be done against the current eCFR text for the applicable section — not against a simple total.

Recommended use

Use this calculator to check whether your planned devices, at their rated capacities, reach the ballpark of the aggregate WLL requirement before you start loading. If the numbers are not close, the plan needs more or better-rated equipment.

After using this tool, verify the actual aggregate WLL requirement and tiedown credit rules for your cargo type against the current eCFR text and carrier policy. This tool starts the planning conversation — it does not finish it.

Practical Notes

This tool is a planning aid only. Verify current device ratings, applicable regulation text, and carrier policy before using any calculated result in a live securement decision.