There is no single honest drying-time number
A thin synthetic shirt spun at high speed in moving dry air can finish far sooner than a thick cotton hoodie or towel in a humid still room. Any calculator that ignores those variables can look precise while being wrong.
The biggest variables are visible
Start with how wet the item is after the washer, how thick and absorbent the fabric is, whether surfaces overlap, and whether air is moving around the rack. Room humidity and temperature then change how quickly that moisture can evaporate.
Use completion checks instead of the clock
Feel thick seams, waistbands, pockets, cuffs, fillings and layered areas before folding or storing. An item can feel dry on the surface while moisture remains inside thicker construction.
Speed it up without unsafe heat
Improve spacing and airflow, and use a compatible washer spin. If you switch to a dryer, use only a heat level allowed by the care label and garment construction.
Garment care labels, appliance manuals and laundry-product directions can be more specific than a general guide. Use them when they set a tighter limit.