How Many Calories Should I Eat Daily? Complete Science-Backed Guide with Personalized Calculator in 2026 How Many Calories Should I Eat Daily? Complete Science-Backed Guide in 2026 Published: January 27, 2026 | By: Bio Friction | Reading Time: 12 minutes Quick Answer: Most adults need between 1,600 and 3,000 calories daily. According to the 2025-2030…