How to use the restriction enzyme volume calculator
Find how many enzyme units and microlitres of enzyme stock are needed to digest a DNA amount. Enter dna amount, enzyme units per µg dna, enzyme stock activity in the fields above; the enzyme units needed, volume of enzyme stock are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “restriction enzyme units”, “digest enzyme volume”, “how much enzyme to add”, “calculate restriction enzyme volume”, “find enzyme units needed”.
Formula
Variables
- DNA — DNA amount (µg)
- Ud — Enzyme units per µg DNA
- Us — Enzyme stock activity (U/µL)
Worked example
With dna amount = 2 µg, enzyme units per µg dna = 10, enzyme stock activity = 10 U/µL, the calculator gives enzyme units needed ≈ 20 U; volume of enzyme stock ≈ 2 µL.
Frequently asked questions
What is the restriction enzyme volume calculator used for?
Find how many enzyme units and microlitres of enzyme stock are needed to digest a DNA amount. It helps with questions such as “restriction enzyme units”, “digest enzyme volume”, “how much enzyme to add”.
What is the formula for the restriction enzyme volume calculation?
Enzyme units needed (U) = DNA × Ud. Volume of enzyme stock (µL) = [Enzyme units needed] / Us. Here DNA is dna amount (µg), Ud is enzyme units per µg dna, Us is enzyme stock activity (U/µL).
What inputs do I need for the restriction enzyme volume calculator?
You need dna amount in µg, enzyme units per µg dna, enzyme stock activity in U/µL. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the restriction enzyme volume calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the restriction enzyme volume result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.