Daily calorie needs vary based on factors like age, gender, activity level, and weight goals. As a general guideline, adult women often need 1,800 to 2,400 calories, while adult men may require 2,200 to 3,000 calories per day. To lose weight, a safe starting point is usually 500 to 1,000 calories less than your daily needs.
Reference: WebMD – Calorie Calculator