Free hCG Level Calculator
Check whether your hCG levels fall within the normal range for your week of pregnancy
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Normal hCG Levels by Week of Pregnancy
These ranges are based on standard medical reference values. Remember — wide variation is completely normal.
| Weeks Pregnant | Typical hCG Range (mIU/mL) | Notes |
|---|---|---|
| 3 weeks | 5 – 50 | 1 week after conception |
| 4 weeks | 5 – 426 | Around missed period |
| 5 weeks | 18 – 7,340 | Rapid rise begins |
| 6 weeks | 1,080 – 56,500 | Heartbeat may be visible on ultrasound |
| 7 – 8 weeks | 7,650 – 288,000 | Peak rise period |
| 9 – 12 weeks | 14,000 – 288,000 | Levels begin to plateau |
| 13 – 16 weeks | 15,300 – 254,000 | Second trimester decline begins |
Understanding hCG in Early Pregnancy
What is hCG?
Human chorionic gonadotropin (hCG) is a hormone produced by the placenta after a fertilized egg implants in the uterus. It is what pregnancy tests detect. hCG levels rise rapidly in early pregnancy, typically doubling every 48 to 72 hours in the first trimester.
Normal doubling time
In a healthy early pregnancy, hCG levels typically double every 48 to 72 hours up to about 6 weeks, then slow to doubling every 96 hours. A doubling time slower than 72 hours may warrant monitoring by your doctor, but is not always a cause for concern.
When to call your doctor
Contact your doctor if your hCG levels are not rising as expected, if you have significant bleeding or cramping, or if you experience one-sided pelvic pain. These can be signs that need medical evaluation. Never rely solely on an online calculator for medical decisions.
hCG in urine vs blood tests
Home pregnancy tests detect hCG in urine but cannot measure exact levels. A blood test (quantitative beta hCG) from your doctor gives a precise number in mIU/mL. Blood tests can detect pregnancy earlier and track whether levels are rising appropriately.
Trusted Products for Early Pregnancy
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