Beta hCG doubling calculator
How quickly are hCG levels rising
Use this calculator to calculate the doubling time of two beta hCG samples (quantitative hCG blood test) by entering the values of the blood tests and the date and time of each test.
In many early pregnancies, the hCG level will double every 31 to 72 hours. As the pregnancy progresses, hCG levels rise and the doubling time increases.
|"Normal" Doubling Time|
|hCG levels||Doubling Time|
|Under 1200 mIU/ml||31-72 hours|
|Between 1200 to 6000 mIU/ml||72-96 hours|
|Over 6000 mIU/ml||more than 96 hours|
hCG levels rise during the first 6 to 10 weeks of pregnancy then decline slowly during the second and third trimesters.
|Human Chorionic Gonadotropin (hCG) Levels|
|From Conception||hCG Level|
|0-1 Weeks||0 - 50 mIU/ml|
|1-2 Weeks||40 - 300 mIU/ml|
|3-4 Weeks||500 - 6,000 mIU/ml|
|1-2 Months||5,000 - 200,000 mIU/ml|
|2-3 Months||10,000 - 100,000 mIU/ml|
|2nd Trimester||3,000 - 50,000 mIU/ml|
|3rd Trimester||1,000 - 50,000 mIU/ml|
|Non-Pregnant Women||< 5.0 mIU/ml|
|Postmenopausal Women||< 9.5 mIU/ml|
Important! Please keep in mind there is a huge variation in "normal" hCG levels at any given time in a pregnancy. These numbers and times are provided only as a guideline. If you have any concerns please consult with your healthcare provider.