Define the cleaning standard
A quick reset, routine clean and deep clean are different scopes. Before estimating, decide what “done” includes: surfaces, floors, fixtures, changing linens, appliance interiors, windows or other specific work.
Scope matters more than a generic house-size rule. Two spaces of the same area can differ greatly in condition, furnishings and number of fixtures.
Use zones and recurring data
Divide the space into repeatable zones and record actual time occasionally. Over time, your own data becomes more useful than a broad online estimate because it reflects the layout, standard and tools you actually use.
Where products require dwell time, ventilation or other precautions, follow their labels. Do not shorten a product instruction merely to meet a schedule.
Build a sustainable frequency
A schedule can spread work across the week instead of creating one large session. The goal of time planning is to fit the chosen standard into available capacity, not to prescribe how much cleaning a person should do.