Start with the payload
Record the material or equipment being moved. Exclude an attachment that you will enter in the next field.
BUYING & LAYOUT / TOOL 01
Total Lifting Load Calculator
Use this before requesting a crane quotation when the hook will carry a load together with a grab, magnet, lifting beam or separate rigging. It makes the suspended-mass breakdown clear.
Before you start: required inputs
- Find the maximum payload mass on the equipment drawing, shipping document or weighing record.
- Find each attachment’s own mass on its nameplate or certified drawing, and total the slings, shackles and other accessories separately.
Calculation diagram
A PRACTICAL WALKTHROUGH
How to use this calculator
Add what hangs with it
Add the empty attachment and separate rigging once each. Use zero when an item is not fitted, and choose the correct unit for every component.
Save the complete breakdown
Calculate, check the total mass and copy or download the result for your RFQ. State which items your total includes.
5,000 kg payload with a lifting beam
THE INPUTS
Payload 5,000 kg; lifting attachment 200 kg; slings and rigging 50 kg.
THE RESULT
The total is 5,250 kg, or 5.25 metric tonnes. At standard gravity this corresponds to a static force of 51.4849 kN.
What does the result mean?
01
Total suspended mass is the combined mass you have entered; it is not an automatically selected crane or hoist rating.
02
The static-force output converts mass using 9.80665 m/s². It adds no acceleration, impact or design factor.
03
If a grab’s stated loaded mass already includes its own weight, split the entries correctly or enter that complete value once.
Watch for this
Adding an attachment twice because it is already included in the quoted loaded weight. Also check whether a supplier’s rating convention includes the hook block.
Formula & model conditions +
Total suspended mass = payload + attachment + rigging
Equivalent static force = total mass × 9.80665 m/s²
- Each mass is counted once. Include a grab, magnet or lifting beam as the attachment when fitted.
- Equivalent static force excludes dynamics. No safe working load, load sharing or crane rating is assigned.
- Crane hook blocks follow the supplier’s rating convention; confirm what the quoted capacity includes.
Common questions
Does 5.25 metric tonnes mean I should buy a 5.25 t crane?
No. Send the breakdown to the supplier so the crane rating, hoist arrangement and operating duty can be checked together.
Should I include the crane hook block here?
Use the rating convention stated by your crane supplier. This form counts the payload, attachment and rigging you enter; it does not automatically add or subtract crane components.