Calculate DNA fragment sizes from restriction enzyme cut positions. Supports linear and circular DNA.
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Frequently Asked Questions
No. Restriction Digest is free, with no signup required, and nothing you enter leaves your browser.
Restriction Digest is built on published formulas and reference ranges from established health sources. We revisit it periodically as guidance evolves; the "Last reviewed" date above shows when that last happened. If something looks wrong, tell us with the feedback button in the bottom-right corner.
No. Restriction Digest gives you a general estimate based on the inputs you provide, not a diagnosis. Existing conditions, medications, and individual history all change what a number actually means for you. Treat this as a starting point for a conversation with a doctor or other qualified health professional, not a substitute for one.