What Is a Cq (Ct) Value?
Don’t be confused by Ct values! We’ll guide you through what they are, how to calculate them, and troubleshooting issues.
Join Us
Sign up for our feature-packed newsletter today to ensure you get the latest expert help and advice to level up your lab work.
Search below to delve into the Bitesize Bio archive. Here, you’ll find over two decades of the best articles, live events, podcasts, and resources, created by real experts and passionate mentors, to help you improve as a bioscientist. Whether you’re looking to learn something new or dig deep into a topic, you’ll find trustworthy, human-crafted content that’s ready to inspire and guide you.
Don’t be confused by Ct values! We’ll guide you through what they are, how to calculate them, and troubleshooting issues.
New to PCR? This Double Delta Ct Calculator simplifies qPCR data analysis by converting Ct values into fold change for gene expression studies. It also highlights potential errors like unstable reference genes or high Ct values, guiding users to validate results before reporting.

The eBook with top tips from our Researcher community.