In lifting and rigging work, precision matters. Small miscalculations in sling angles, tension loads, or connection hardware can lead to major risks on-site. That’s why we’ve developed a set of straightforward calculators to support day-to-day lift planning.

These tools are built for professionals — from rigging engineers to crane operators — who need clear numbers when planning complex or high-stakes lifts. Whether you're dealing with offset loads, low-angle rigging, or tight lifting points, the calculators here help you get quick answers based on real-world conditions and standard lifting formulas;

They’re meant to assist with decisions like:

  • How much tension will be on each sling?
  • What angle keeps the load balanced and within capacity?
  • What size shackle is safe for this lift?

If you’re looking to reduce guesswork and improve how your lifts are prepared, these tools are here to help — fast, and free to use.

If you need help reviewing a lift plan or selecting the right gear, our team is available to assist with technical guidance, equipment recommendations, and compliance checks.

Sling length calculator

The length of each sling part is important, read more here and calculate sling length based on vertical height or angle.

Sling length calculator

Shackle size calculator

The shackle in a lifting sling must be able to withstand the tension of the lift. Therefore, it is important to choose the right shackle size for the task.

Shackle size calculator

Center of gravity

The center of gravity is important because it determines whether the load hangs stably and whether all parties in the sling lift correctly. Calculate the center of gravity here.

Center of gravity

Sling tension calculator

The tension in a sling changes depending on the angle of inclination in the configuration. Calculate the sling tension here.

Sling tension calculator