Enter the HCG level and gestational age into the calculator to determine the estimated gestational age of the pregnancy. This calculator can also evaluate any of the variables given the others are known.

## Hcg To Weeks Formula

The following formula is used to estimate the gestational age of the pregnancy based on HCG levels.

GA = log2(HCG/5) * 72 / 24

Variables:

- GA is the gestational age in weeks
- HCG is the level of Human Chorionic Gonadotropin in the body (mIU/mL)

To calculate the gestational age, take the logarithm base 2 of the HCG level divided by 5. Multiply the result by 72 and then divide by 24. This formula is based on the assumption that HCG levels double every 72 hours, and there are 24 hours in a day and 7 days in a week. Please note that this is a rough estimate and may not accurately reflect the actual gestational age. Always consult with a healthcare professional for accurate information.

## What is a Hcg To Weeks?

HCG to weeks refers to the correlation between the levels of Human Chorionic Gonadotropin (HCG) hormone in a woman’s body and the gestational age of the pregnancy. HCG is a hormone produced by the placenta after implantation, and its levels can be detected in urine and blood. These levels typically double every 72 hours and reach their peak in the first 8-11 weeks of pregnancy. Therefore, by measuring the HCG levels, healthcare professionals can estimate the gestational age of the pregnancy, although it’s not the most accurate method for dating a pregnancy.

## How to Calculate Hcg To Weeks?

The following steps outline how to calculate the gestational age in weeks using the HCG to Weeks formula.

- First, determine the level of Human Chorionic Gonadotropin (HCG) in the body (mIU/mL).
- Next, divide the HCG value by 5.
- Next, take the logarithm base 2 of the result from step 2.
- Next, multiply the result from step 3 by 72.
- Finally, divide the result from step 4 by 24 to calculate the gestational age in weeks (GA).

**Example Problem:**

Use the following variables as an example problem to test your knowledge.

HCG (mIU/mL) = 500

GA (gestational age in weeks) = ?