dsDNA pmol Calculator — restriction fragment

About dsDNA pmol Calculator — restriction fragment

Convert a restriction fragment mass (ng) and length (bp) into picomoles of dsDNA. pmol = ng × 1000 / (bp × 650). The calculation uses pmol = ng × 1000 / (bp × 650). The stakes: Ligation and assembly efficiency hinge on the molar ratio of insert to vector — not the mass ratio. Because long fragments contain fewer moles per ng, a 'balanced' mass mix can be wildly off in moles. Average dsDNA base pair ≈ 650 g/mol. Watch out for: too little or too much insert; stale ligase or ATP; using a mass ratio instead of a molar ratio. Because the calculation happens entirely client-side, you can use it offline and with confidential data, then cite the stable URL in your methods or teaching notes.

How to use dsDNA pmol Calculator — restriction fragment

1. 1Enter your values: DNA mass, Length.
2. 2Read the headline result and the supporting figures, which recompute as you type.
3. 3Open “Worked example with your numbers” to see the substituted formula step by step.
4. 4Copy the result, or use the cite-this-tool snippet for your methods section.

Why use dsDNA pmol Calculator — restriction fragment?

• ✓Copy-ready result and a one-line “cite this tool” snippet for your methods section
• ✓Designed for molecular cloners and synthetic biologists who need a trustworthy answer fast
• ✓Instant, client-side result — works offline once loaded and keeps your data private
• ✓Shows the worked example step by step with your own numbers, not just a final figure
• ✓Pre-filled with sensible, niche-specific defaults so it is useful the second it loads

Frequently asked questions

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