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Cart Push Force Calculator

Estimate the sustained force needed to push a loaded cart from its weight, rolling resistance, and floor grade, and compare it with the 50 lbf ergonomic guideline.

Push effort is what makes a cart feel heavy or light, and it scales with the load, the rolling resistance of the wheel on that floor, and any slope. Enter the loaded weight, a rolling resistance coefficient, and the grade; the calculator returns the sustained push force and its share of the 50 lbf whole-body guideline commonly cited by ergonomics sources such as CCOHS.

The coefficient is the number that matters most. Hard polyurethane on smooth concrete sits near 0.01 to 0.03; soft rubber, rough floors, and debris raise it. Use the wheel manufacturer’s figure when one is published, and treat the result as a comparison tool rather than a measured floor test.

Inputs

Load, wheels, and route

Range: 10–20,000 lbf

Range: 0.003–0.15

Typical published values: hard polyurethane on smooth concrete about 0.01-0.03, soft rubber or rough floors higher. Use the wheel manufacturer's figure when available.

Range: 0–15 %

Rise over run. A 1 in 20 ramp is 5%.

Range: 10–100 lbf

50 lbf is the sustained whole-body push limit commonly cited from CCOHS (225 N).

Result

Share of the ergonomic guideline (%)
20
Sustained push force (lbf)
10.0

What to check

  • Confirm the rolling-resistance value against the wheel maker's data before trusting the force.
  • Add grade as a decimal fraction of the load, not as a separate coefficient.
  • Compare with the 225 N (50 lbf) whole-body push guideline and note the posture assumed.

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The rolling-resistance coefficient is an input, not a measured value. Breakaway force, floor defects, wheel wear, and bearing condition are not modeled; the result is for screening and option comparison.