Frequently asked questions

Our Scientific Applications Support team has assembled a list of frequently asked questions to help you find answers quickly. Filter using one or more categories to focus on specific topics, or use the search bar to perform a text search.

Search all FAQs:

How do I calculate the molecular weight of an oligo?

The IDT free, online OligoAnalzyer tool, accessed from the SciTools tab on the IDT website (, will analyze an input sequence and provide its molecular weight, as well as GC content, melting temperature, µg/OD, nmole/OD, and extinction coefficient.

Custom DNA & RNA