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Calculators for resuspension and dilution of oligonucleotides

Use our free oligo calculators to simplify your resuspension and dilution process

Save time by using these free oligo resuspension and dilution calculators. A variety of units can be used as input values. Review the screen shots that show how these calculation tools can help you move on with your research.

Figure 1. Access the Resuspension and Dilution Calculators via the Tools tab on the IDT website.

Resuspension Calculator

The Resuspension Calculator (Figure 2) determines the volume needed to resuspend a dry-shipped oligo for a desired final concentration. You can provide the input as nmol, mg, or as OD260 with MW or extinction coefficient (provided on the spec sheet sent with the oligo). Likewise, you can specify the units of final concentration.

Note: Be sure to enter the amount shipped, not the scale ordered, as synthesis efficiency and purification will decrease the ultimate amount of oligo you receive.

WebTools Resuspension Calc Figure 2A page 11
Figure 2. The IDT Resuspension Calculator.

Dilution Calculator

WebTools Dilution Calc Figure 2B page 11
Figure 3. The IDT Dilution Calculator.

The Dilution Calculator (Figure 3) provides details on how to dilute a stock solution to a desired concentration. You are given a choice of input and output concentration units (molarity or mass per volume). The Resuspension and Dilution Calculators are just two examples out of a suite of SciTools™ programs, provided for free use on the IDT website. Others include:

Explore these tools, and others, in the SciTools suite here.

*RUO—For research use only. Not for use in diagnostic procedures. Unless otherwise agreed to in writing, IDT does not intend these products to be used in clinical applications and does not warrant their fitness or suitability for any clinical diagnostic use. Purchaser is solely responsible for all decisions regarding the use of these products and any associated regulatory or legal obligations. RUO23-1868_001

Published Sep 21, 2012
Revised/updated Feb 27, 2023