Praktické

Prírastok hmotnosti v tehotenstve

🤰Pregnancy Weight Gain Calculator

BMI pred tehotenstvom (kg/m²)

e.g. 22.5

Current gestational week

1–40

What is Pregnancy Weight Gain?

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Recommended pregnancy weight gain is based on pre-pregnancy BMI, as established by the Institute of Medicine (IOM) 2009 guidelines. Gaining too little weight increases the risk of low birth weight; gaining too much increases risks of gestational diabetes, caesarean delivery, and postpartum weight retention.

Calkulon makes complex calculations simple — built for students and everyday problem-solvers.

How to Pregnancy Weight Gain

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1IOM recommends different total weight gain ranges based on pre-pregnancy BMI
2First trimester gain: typically 1.1–2.2 kg (0.5–1 kg/month)
3Second and third trimester: 0.2–0.5 kg/week depending on BMI category

Worked Examples

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Example 1

Given:Pre-pregnancy BMI 22 (normal weight)

Výsledok:Recommended gain: 25–35 lbs total

Real-World Applications

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Tracking personal health and fitness goals

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Guidance for healthcare conversations with your doctor

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Monitoring progress during a weight management programme

IOM Weight Gain Recommendations (2009)

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Pre-pregnancy BMI	Total Gain (singleton)	Rate in 2nd/3rd Trimester
Underweight (< 18.5)	12.7–18.1 kg	0.51 kg/week
Normal weight (18.5–24.9)	11.3–15.9 kg	0.42 kg/week
Overweight (25.0–29.9)	6.8–11.3 kg	0.28 kg/week
Obese (≥ 30.0)	5.0–9.1 kg	0.22 kg/week
Twin pregnancy (normal)	16.8–24.5 kg	Higher across all BMI

Frequently Asked Questions

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What is Pregnancy Weight?

How accurate is the Pregnancy Weight calculator?

The calculator uses the standard published formula for pregnancy weight. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

What units does the Pregnancy Weight calculator use?

This calculator works with kilograms, inches. You can enter values in the units shown — the calculator handles all conversions internally.

What formula does the Pregnancy Weight calculator use?

The calculator applies the standard formula for this type of calculation. See the 'How It Works' steps above for the detailed formula breakdown.

References

Len na informačné účely. Tento nástroj nenahrádza odborné lekárske poradenstvo, diagnózu ani liečbu. Vždy sa poraďte s kvalifikovaným zdravotníckym odborníkom.

Deep Dive

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Formula-verified for precision

Reviewed October 2026

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