Use a step stool for a short indoor reach only when you can stand fully and steadily without overreaching. Use a properly rated self-supporting ladder for higher work, and stop when the job requires roof access, electrical exposure, or a position you cannot maintain safely.
Choose height before features
Start with the work height, not the shelf height. The goal is to keep your body centered and both feet on a stable, intended step or platform. If reaching requires standing on the top step, leaning sideways, placing a stool on furniture, or stretching to hold a tool, choose a different approach or get help.
OSHA’s portable-ladder guidance is written for workplaces, but its core safety principles are useful for homeowners: follow labels and markings, inspect before use, use the ladder only for its designed purpose, keep rungs and feet free of slippery material, and maintain three points of contact while climbing.
A step stool is not a small ladder for every job
A step stool can be appropriate for short, ordinary indoor tasks when it is on a firm, level floor and the user can remain within the manufacturer’s stated limits. It is not a substitute for a taller ladder, a platform, a scaffold, or a way to reach a ceiling task from a countertop or furniture.
Do not use a self-supporting ladder partly closed as a leaning ladder, do not use damaged equipment, and do not move or shift it while someone is standing on it.
When the answer is neither
If the task is near electricity, outdoors in poor weather, on stairs or an uneven surface, on a roof, or involves a heavy or awkward item, a beginner guide cannot make it safe by adding a few steps. Delay the job, change the method, or use qualified help.