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🔒 Calculated in your browser – nothing is sent

Pregnancy Week Calculator

Find out how many weeks and days pregnant you are, your trimester and the days left until your due date. Free and private.

How to use

Find out how many weeks and days pregnant you are, which trimester you are in and how many days remain until your due date. Enter your last period or your due date and choose the date to calculate for. It is useful for tracking appointments and milestones.

  1. Enter your details.
  2. Results update instantly.
  3. Adjust the values to see how they change.

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👶Pregnancy Due Date CalculatorEstimate your due date from your last period or conception date, plus your gestational age and trimester dates. Free and private.🌸Ovulation CalculatorEstimate your ovulation day, fertile window and next period from your last period and cycle length. Free and private.🔥Calorie CalculatorEstimate your daily calories to maintain, lose or gain weight using the Mifflin-St Jeor equation. Free and private.⚖️Ideal Weight CalculatorSee your ideal weight range using the Devine, Robinson, Miller and Hamwi formulas and the healthy BMI range.📏Body Fat CalculatorEstimate your body fat percentage with the US Navy method from height, neck, waist and hip measurements.💧Water Intake CalculatorEstimate how much water you may need each day from your weight and exercise. Free and private.📈Pregnancy Weight Gain CalculatorSee the recommended pregnancy weight gain for your pre-pregnancy BMI using 2009 Institute of Medicine guidelines.

Frequently asked questions

How are pregnancy weeks counted?

Pregnancy is counted from the first day of your last period, so you are already counted as about 2 weeks pregnant at conception.

What are the trimesters?

The first trimester runs to the end of week 13, the second from week 14 to week 27, and the third from week 28 until birth.

Is it free?

Yes. Everything is free, with no sign-up and no limits.

Is my data stored or sent?

No. Calculations run in your browser and nothing you enter is sent or stored.

Can I rely on these results?

They use standard published formulas and give estimates for general information.

For general information only. This is not medical advice. Talk to your doctor, midwife or dietitian about your own situation.