hCG Doubling Time Calculator
Worried about your beta hCG numbers? Enter two blood-test results to see how fast your hCG is rising — and what is typical in early pregnancy.
Your hCG results
Understanding beta hCG
hCG (human chorionic gonadotropin) is the pregnancy hormone measured in blood (beta hCG) tests. In a healthy early pregnancy it usually doubles every 48-72 hours.
Levels vary enormously between people — absolute numbers matter less than the trend. A single value cannot confirm viability.
Rising but slow hCG, or hCG that rises then falls, can signal a miscarriage or ectopic pregnancy. Always interpret results with your clinician.
Typical hCG reference (early pregnancy)
hCG roughly doubles every 48-72 hours in weeks 4-6. Values above ~5 mIU/mL are generally positive; specific ranges depend on gestational age.
hCG calculator FAQ
How fast should hCG rise?
In early pregnancy hCG usually roughly doubles every 48–72 hours.
What if it's rising slowly?
Slow rise can indicate concerns — your doctor will monitor with repeat tests and ultrasound.
What hCG level confirms pregnancy?
A blood hCG above ~25 mIU/mL generally confirms pregnancy.