Tommy's PregnancyHub

Check how healthy you are

Find out how healthy you are with our simple calculator tools and see what changes you can make to help you have a healthier pregnancy.

Calculate your BMI

Your height
Your weight

BMI stands for body mass index, and this is a way for your health team to know whether you are a healthy weight for your height.

If you’re overweight, now is not the time to ‘crash’ diet though. The most important thing is to keep pregnancy weight gain at a healthy level.

Find out more about why managing your weight in pregnancy is important.

Calculate your caffeine intake

Drinking a lot of caffeine in pregnancy has been linked to miscarriage and low birth weight so the current advice is to limit your caffeine intake to no more than 200mg a day during your pregnancy.

Find out more about caffeine in pregnancy.

Some people think that the stress of quitting smoking is worse for the baby than continuing to smoke, but this is not true. Stopping smoking is the best thing you can do to help your baby grow and develop well in the womb.

It's also a very expensive habit. Use our smoking calculator to see what you can buy when you quit.

Find out more about smoking and pregnancy and get help to stop.

  1. CMACE/RCOG (2010), Joint Guideline Management of Women with Obesity in Pregnancy: (accessed 23/03/2018)
  2. NICE (2010), Dietary interventions and physical activity interventions for weight management before, during and after pregnancy, Public health guidance 27, 2010
  3. NHS Choices, Caffeine in pregnancy: (accessed 23/03/2018)
Review dates
Last reviewed: 10 April 2018
Next review: 10 April 2021