Free hCG Level Calculator
Check whether your hCG levels fall within the normal range for your week of pregnancy
🧪 hCG Level Calculator
Track your hCG levels & doubling time in early pregnancy
Enter two hCG blood test results to calculate how fast your levels are doubling.
Enter a single hCG level and how many weeks pregnant you are to see if it's in the typical range.
What this means
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📊 Typical hCG Ranges by Week
| Weeks (since LMP) | Typical hCG (mIU/mL) |
|---|
What Is hCG?
Human chorionic gonadotropin (hCG) is the "pregnancy hormone." It's produced by cells that form the placenta shortly after a fertilized egg implants in the uterus. hCG is what home pregnancy tests detect, and blood tests can measure its exact amount in mIU/mL.
Why Doubling Time Matters
In early pregnancy, hCG should rise predictably. Rather than focusing on a single number, doctors look at how quickly it's doubling:
- ⏱️ Below 1,200 mIU/mL: typically doubles every 48–72 hours
- ⏱️ Between 1,200–6,000 mIU/mL: doubles every 72–96 hours
- ⏱️ Above 6,000 mIU/mL: rises more slowly, doubling can take 96+ hours
A rise of at least 35–53% over 48 hours is generally considered reassuring in early pregnancy.
Typical hCG Levels by Week
| Weeks Since LMP | Typical Range (mIU/mL) |
|---|---|
| 3 weeks | 5 – 50 |
| 4 weeks | 5 – 426 |
| 5 weeks | 18 – 7,340 |
| 6 weeks | 1,080 – 56,500 |
| 7–8 weeks | 7,650 – 229,000 |
| 9–12 weeks | 25,700 – 288,000 |
| 13–16 weeks | 13,300 – 254,000 |
| 17–24 weeks | 4,060 – 165,400 |
| 25–40 weeks | 3,640 – 117,000 |
Note: Ranges are very wide and vary by lab. A healthy pregnancy can fall outside these numbers.
What If My Levels Are Lower or Higher?
📉 Lower or slow-rising hCG
This can be normal — especially if dates are off — but may sometimes indicate an early loss or ectopic pregnancy. Your doctor will repeat tests and may order an ultrasound.
📈 Higher than expected hCG
Very high levels can simply mean your dates are earlier than thought, or may indicate twins/multiples. Your doctor will confirm with an ultrasound.
Frequently Asked Questions
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