HPB Health Tool -- Calorie Calculator

I just tried out the Calorie Calculator tool on the HPB website and found out that daily energy requirement is actually 2263kcal, based on daily lifestyle. Since I'm an active sportwomen who plays competitive squash and leisure badminton and tennis, my estimated calorie intake in relatively high. From tracing my 3-day food consumption, I also noticed that I am not taking in enough calories. Therefore, I hope to improve my daily nutritional intakes to meet my body's requirements better. :)