Professional tools for forklift operators, fleet managers, and procurement teams in Singapore. Calculate safe working loads, estimate battery working hours, and compare diesel vs electric running costs.
Use this free forklift safe working load (SWL) calculator to determine whether your forklift can safely carry a load at a given load centre distance. Based on the counterbalance principle used by all counterbalance forklifts — diesel and electric — from 1.5T to 16T. Essential for forklift operators, warehouse managers, and logistics teams in Singapore.
Counterbalance principle: Rated Load × Load Centre = COG Distance × Load Weight
From the forklift nameplate
Standard is 500mm for most forklifts
Measure from fork face to centre of gravity of load
Gross weight of the goods
✅ Safe to Carry
Safety margin: 0.0% below capacity
Actual Capacity at 600mm COG
2500 kg
Load Weight
2500 kg
Formula Check
3000 kg × 500 mm = 2500 kg × 600 mm
1500000 = 1500000 ✓
⚠️ This calculator is for reference only. Always consult the forklift's rated capacity chart and a qualified LM-certified operator before any lift. Load centre, mast tilt, and attachment weight all affect actual safe working load.
Standard forklift load centre
Most counterbalance forklifts are rated at a 500 mm load centre. Capacity drops proportionally as the load centre increases beyond this value.
SWL formula
Actual Capacity (kg) = Rated Load (kg) × Rated Load Centre (mm) ÷ Actual COG Distance (mm).
What causes a forklift to tip forward?
Overloading, excessive load centre distance, raising the mast too high, or turning too fast with a raised load can all cause forward tip-over.
Singapore forklift safety regulation
Under Singapore's WSH Act, all forklift operators must possess a valid operating license and must never exceed the rated capacity shown on the forklift's data plate.
Common questions about forklift safe working load, load centre, and the counterbalance principle.
Ready to rent a forklift in Singapore?
Diesel & electric forklifts from 1.5T to 16T. Daily, weekly, or monthly rental.