Check important results before relying on them
Our tools are designed for convenience and general information, not as a substitute for professional judgment.
Effective: July 27, 2026
General information only
Results are not financial, legal, medical, tax, engineering, safety, or other professional advice. Consult a qualified professional when a result may affect important rights, obligations, health, safety, or money.
Dates and time
Date results may depend on whether the starting day is included, the user’s time zone, daylight-saving rules, leap years, local calendars, and the exact time of an event. Each tool explains its principal counting assumptions where relevant.
Approximate values
Values labeled approximate are intentionally simplified. For example, lived hours cannot be exact without a birth time and time zone.
Verification
Recheck critical outputs using an authoritative source or independent method. Please report suspected errors through the Contact page.