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Fill in the form and press Calculate to see your personalized estimate.
About the method
The estimate starts from Mifflin–St Jeor basal metabolic rate for females, scales by activity to approximate daily energy expenditure, and then adds trimester-specific energy needs for a singleton pregnancy.
- First trimester often requires little additional energy overall day to day.
- Second trimester uses a typical addition around 340 kcal per day.
- Third trimester uses a typical addition around 452 kcal per day.
Hydration micronutrients and clinical factors also matter. Always confirm targets with your healthcare professional.
FAQs
The calculator uses the Mifflin–St Jeor equation for females, a widely used estimate for resting energy expenditure.
Enter pre-pregnancy weight for the most comparable estimates. Current weight can be higher and may overstate baseline energy needs.
Sedentary is little exercise. Light is 1–3 days per week. Moderate is 3–5 days. Very active is 6–7 days. Athlete is physical job or intense training.
Yes. Typical additions are 0 kcal in the first trimester, 340 kcal in the second, and 452 kcal in the third for a singleton pregnancy.
This version focuses on singleton pregnancies. Energy needs for multiples vary widely. Please confirm targets with your obstetric care team.
They provide general patterns for planning. Individual protein fat and carbohydrate needs can differ based on medical history and stage of pregnancy.
Age is part of the BMR equation. It helps estimate resting energy needs before activity and trimester adjustments are applied.
No. This is an educational tool. Use it to start a conversation with your clinician who can provide personalized guidance.