DNA Molecular Weight

DNA sequences

StrandsTopology

Output

How to calculate the molecular weight of DNA

Paste one or more DNA sequences, as plain text or FASTA.
Choose single or double stranded, and linear or circular.
The molecular weight appears in daltons for each sequence.

Frequently asked questions

What does circular change?

A circular molecule has no free ends, so the water and phosphate difference at the ends is left out. For a plasmid, choose double stranded and circular.

Is my sequence uploaded?

No. Everything runs in your browser, so your sequences never leave your device.

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