Methodology guide
Limits, under-car safety, and when to stop shopping this ladder.
Calculator
Mechanic creeper capacity calculator
Enter body weight and tools on the creeper in pounds. Get required capacity (body + tools) and a 300 / 400 / 450 lb class or NO_MATCH. Never exceed nameplate; flat floor; chock vehicle.
Result
Required = body_lb + tools_lb. Worked check: 180 + 20 = 200 → 300 lb class. Never exceed nameplate; use on a flat floor; chock the vehicle; a creeper is not a jack stand.
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