What Is hCG?
What is hCG? Human chorionic gonadotropin (hCG) is a hormone produced soon after implantation occurs, and it's a vital signal of early pregnancy. This hormone supports the uterine lining and prevents menstruation, allowing pregnancy to continue developing. It’s the hormone that both urine and blood tests detect to confirm pregnancy.
While a home test simply confirms presence, a blood test provides a numeric value of beta hCG levels, which can be used to evaluate how fast the pregnancy is progressing. That’s where tools like our beta hCG calculator and hCG increase calculator become helpful.
How Does the hCG Calculator Work?
Lunara’s hCG calculator is easy to use: enter the values and dates of your beta hCG blood tests, and the tool instantly estimates your hCG doubling time. Whether you’re hoping to calculate my hCG levels for peace of mind or are under medical care and need more context, this tool delivers results instantly.
This is not just a calculator for hCG values—it's a comprehensive tool that acts as an hCG test calculator, giving you doubling times, percentage increases, and a timeline that you can discuss with your healthcare provider. Best of all, it’s browser-based, so no data is saved or stored.
When to Use the Calculator for hCG Monitoring
Our hCG pregnancy calculator is ideal if you’ve had more than one hCG blood test and want to understand how your levels are changing. This includes:
• IVF or assisted reproduction monitoring
• Tracking pregnancy after previous loss
• Evaluating hCG after early symptoms such as spotting or cramping
•Measuring recovery after miscarriage or treatment for ectopic pregnancy
Because it’s an online hCG calculator, you can use it on your phone or desktop without any downloads or data sharing.
Understanding hCG Doubling Time
A key indicator of early pregnancy health is how fast your beta hCG levels are rising. Normally, hCG should double every 48 to 72 hours in the first weeks of pregnancy. This rapid increase supports the development of the embryo and is one of the earliest indicators that things are progressing as expected.
By using our hCG doubling time calculator, you can identify whether your levels are rising within the typical window. A slightly slower doubling time doesn’t always indicate a problem—but tracking the trend over time provides valuable context.
Interpreting Your hCG Levels
Lunara’s hCG levels calculator is designed to help you make sense of your blood test results. For many people, simply seeing whether their hCG has increased and at what rate brings peace of mind. For others, a discussion with a doctor may be required, especially if results are borderline or unexpected.
Remember, individual hCG values vary widely—what’s considered low for one person may be normal for another depending on gestational age. This is why our beta hCG levels calculator doesn’t just report numbers; it interprets them against medically reviewed standards.
When Does hCG Start Showing Up?
hCG becomes detectable in the bloodstream approximately 10 days after ovulation, often before a missed period. For most people, a blood test can confirm pregnancy between 10 and 12 days after ovulation, while home urine tests may not be accurate until around day 14.
This early production of hCG is why blood tests are often used when early confirmation is necessary. If you’re testing before your expected period and receive a negative result, it may simply be too soon for detection. Our hCG test calculator can help you estimate when testing is likely to yield accurate results based on ovulation and test dates.
hCG Chart: What Are Typical Levels?
To help interpret your hCG results, here’s a simplified hCG measurement chart based on days past ovulation (DPO):
Days Past OvulationExpected hCG Range (mIU/mL)
10 DPO 10 – 50
14 DPO 50 – 500
21 DPO 200 – 5,000
28 DPO 1,000 - 10,000+
This hCG chart reflects the wide range of what’s considered normal. Some people may have high initial values; others may start low and still experience a healthy pregnancy. What’s most important is the rate of increase, which you can analyse with our hCG increase calculator and hCG levels calculator.
hCG Pregnancy Chart: How Hormone Levels Change
An hCG pregnancy chart shows how hormone levels typically change week by week in early pregnancy. While every pregnancy is different, the general trend looks like this:
• Week 3–4: Rapid rise as implantation occurs
• Week 5–6: Levels double every 2 days
• Week 7–8: Peak hCG production
• Week 9–12: Plateau or mild decline as placenta takes over hormone production
Using a beta hCG calculator in this timeframe can help confirm that your pregnancy is developing as expected.
When Do hCG Levels Reach Their Peak?
In early pregnancy, hCG levels typically rise rapidly, doubling every 48–72 hours. Around 8 to 11 weeks, this increase slows, and levels plateau or slightly decline—a normal sign that the placenta is taking over hormone production. Using a beta hCG calculator to calculate your hCG levels and spot trends—then consult your doctor for professional guidance.
What Does It Mean If Your hCG Levels Are Low?
Low hCG levels can result from early pregnancy timing or individual variations. While they may indicate issues like ectopic pregnancy, they aren't always a cause for concern. Use Lunara’s hCG calculator to calculate your hCG levels and spot trends—then consult your doctor for professional guidance.
Tracking Your hCG Levels
Using an hCG level calculator allows you to take a proactive role in understanding your pregnancy progression. Especially in cases of IVF or prior complications, tracking can offer early insights.
• Track serial hCG levels over time
• Estimate hCG doubling times with precision
• Compare with standard hCG charts
• Log your results privately, with no stored data
At Lunara, we believe in empowering you with information—safely and securely
Key Benefits of Lunara’s hCG Calculator
• Quick calculations: Get instant results from your beta hCG levels.
• Easy to use: Designed for simplicity, no logins required.
• Private: The hCG calculator works entirely in-browser—no tracking, no data collection.
• Helpful insights: Understand your values with reference to trusted hCG measurement charts and clinical guidelines.
• Supports informed decisions: Use the hCG pregnancy calculator to make sense of your early pregnancy journey.
Try Lunara’s hCG Calculator Today
Whether you're hoping to calculate my hCG levels after a recent blood test, estimate your hCG doubling time, or simply monitor your progress, Lunara’s free online hCG calculator is the smart, private way to gain clarity during early pregnancy. With integrated comparisons from the hCG chart and hCG pregnancy chart, you’ll have the information you need—right when you need it.