Calcular horas de sono

Sleep is not merely rest — it is a highly structured biological process during which your brain consolidates memories, your body repairs tissues and your hormonal system rebalances. Our sleep calculator works by calculating backward from your desired wake-up time to identify the optimal bedtimes that align with your natural 90-minute sleep cycles. Waking in the middle of a deep sleep phase — rather than at its natural end — is the primary cause of that groggy, disoriented feeling known as sleep inertia.

Quality sleep is inseparably connected to other health metrics. Research consistently shows that sleep deprivation disrupts appetite-regulating hormones, making weight management far more difficult. We recommend pairing your sleep optimisation with our BMI Calculator and Calorie Calculator for a genuinely holistic picture of your physical well-being.

Adults generally require 7–9 hours of sleep per night according to the National Sleep Foundation, but individual needs vary based on age, genetics and health conditions. The most important principle is consistency — going to bed and waking at the same time every day, even on weekends, anchors your circadian rhythm and maximises the restorative quality of every sleep cycle.

O que é um ciclo de sono e por que é importante?

O sono é composto por ciclos de aproximadamente 90 minutos com fases NREM e REM. Uma noite completa inclui 5-6 ciclos. Acordar a meio de um ciclo provoca inércia do sono. A nossa calculadora recomenda horas de deitar alinhadas com o fim dos ciclos.

A dívida de sono e os seus efeitos reais

Perder 90 minutos de sono por noite durante uma semana prejudica mensuravelmente o desempenho cognitivo.