Human Optimal Sleep Duration Calculator

Record daily weight changes and provide visual charts to display weight trends. Supports data storage, edit/delete, statistical analysis and other functions to help you scientifically manage your weight.

Scientifically calculate daily calorie needs based on age, gender, weight, height, and activity level, providing personalized nutrition advice and macronutrient distribution.

Based on the 90-minute sleep cycle theory, scientifically calculate optimal sleep and wake times. Provides two calculation modes: set wake up time to calculate optimal sleep time, or calculate optimal wake up time based on current time, helping you get quality sleep.

Calculate your recommended sleep duration based on American Academy of Sleep Medicine (AASM) guidelines. Provides optimal sleep time ranges for different age groups and practical suggestions to help improve sleep quality.

Query uric acid health range, automatically identify health status, provide personalized health advice and dietary considerations, support unit conversion and visual chart display.

Scientifically manage daily water intake, develop healthy drinking habits, and protect your health. Provides water intake level selection, health standard reference, progress tracking and visual trend analysis.

Scientifically calculate body mass index, assess health status, and provide professional health advice.