Pregnancy Calculators: Due Date, Ovulation and Milestones
From planning a pregnancy to tracking its milestones — how due dates, ovulation, conception, the trimesters and healthy weight gain are estimated, in plain language.
Pregnancy Weight Gain Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Recommended gain – upper
16.0
- Recommended gain – lower
- 11.5
- Pre-pregnancy BMI
- 22.0
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Pregnancy Weight Gain Calculator
The Pregnancy Weight Gain Calculator works out your recommended gain – upper, along with 2 related figures in an instant. Enter pre-pregnancy weight and height and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the pre-pregnancy weight.
- Enter the height.
- Read off your recommended gain – upper, together with recommended gain – lower and pre-pregnancy bmi — the calculator updates automatically, with no button to press.
Worked example
For example, with pre-pregnancy weight of 60 kg and height of 165 cm, the recommended gain – upper is 16.0.
| Pre-pregnancy weight | 60 kg |
|---|---|
| Height | 165 cm |
| Recommended gain – upper | 16.0 |
|---|---|
| Recommended gain – lower | 11.5 |
| Pre-pregnancy BMI | 22.0 |
Results are estimates for educational use, not professional advice.
Key terms explained
- BMI
- Body Mass Index — weight in kilograms divided by height in metres squared, a screening measure of body weight.
Frequently asked questions
It depends on your pre-pregnancy BMI. A healthy BMI (18.5–25) suggests about 11.5–16 kg for a single pregnancy. Underweight suggests more, overweight less.
It follows widely used guidelines that tie total recommended gain to your pre-pregnancy BMI category.
No. These ranges are for a single pregnancy. Twin pregnancies have higher recommended gains; ask your doctor.
Use it as a guide only. Your healthcare provider gives personalised advice based on your health and how the pregnancy is progressing.
Enter the pre-pregnancy weight. Enter the height. Read off your recommended gain – upper, together with recommended gain – lower and pre-pregnancy bmi — the calculator updates automatically, with no button to press.
Related guides
Pregnancy Weight Gain Table: Recommended gain – upper by Pre-pregnancy weight
Reference table of recommended gain – upper for Pregnancy Weight Gain across a range of pre-pregnancy weight values — exact, engine-computed figures you can read off at a glance.
How to Calculate Pregnancy Weight Gain: Formula, Steps & Examples
Learn how to calculate Pregnancy Weight Gain — the formula explained step by step, with worked examples and a free calculator to check your answer.