Quickly check how a reeve or choked sling setup may affect lifting capacity. Use this calculator as a simple guide when refreshing rigging knowledge or preparing for a VOC.

Reeve Factor Calculator — Voceed
Voceed
Tools Suite
Reeve Factor & WLL Calculator
Education Tool · Dogging & Rigging

See How Reeve Factors Affect Your Sling

Select a sling or chain, set your load weight and hitch type — see effective WLL, remaining capacity, and how every configuration compares at a glance.

Step 1 — Select Sling or Chain
Blue Synthetic 8.0 t WLL
Step 2 — Load Weight
Total Load 5,000 kg
100 kg2.5 t5 t7.5 t10 t
Step 3 — Hitch Configuration
Step 4 — Number of Legs
Leg Configuration
Blue Synthetic Sling
Marked WLL: 8.0 t
Direct Connection
Single Leg
Load: 5.0 t
Reeve Factor
1.00
Direct connection
Angle Factor
—
Single leg
Effective WLL
8.00 t
After all factors
Min Sling WLL
—
Required per leg
Capacity Usage — Selected Configuration —
0%25%50%75%100%+
% Capacity Used
—
% Capacity Remaining
—
Headroom / Shortfall
—
All Configurations — At a Glance
Configuration Load Shape Reeve Factor Combined Factor Effective WLL % Used Status
⚠ Educational Tool Only. This calculator is for study and estimation purposes only. It does not replace a lift plan or the judgement of a competent person. Always verify WLL against the specific sling or chain tag and current manufacturer data before any lift. Calculations assume a symmetrical lift with equal leg lengths, level pick points, and a steady static lift.