Molecular Lab Tools calculator

SDS-PAGE Gel Helper

Choose an SDS-PAGE gel percentage and estimate simple resolving gel reagent volumes. Use it for classroom work, protocol planning, and quick wet-lab checks before you verify final values independently.

Target protein size kDaResolving gel volume mLAcrylamide stock %

Recommended gel

10%

Many 35–80 kDa proteins resolve well around 10%.

Acrylamide 3.33 mLWater 3.96 mLTris 2.5 mLAPS 0.1 mLTEMED 0.01 mL

SDS-PAGE Gel Helper interface showing inputs, calculated results, and molecular lab workflow cards

SDS-PAGE Gel Helper explained

This SDS-PAGE gel helper suggests a gel percentage based on target protein size.

Large proteins usually need lower percentage gels, while small proteins usually need tighter high-percentage gels.

The recipe helper estimates acrylamide stock and common resolving gel reagent volumes for planning and teaching.

The calculator handles empty fields, invalid numbers, and common input formatting mistakes. It gives a clear result and a short interpretation so users can decide what to check next. Students can use the page to learn the calculation logic. Lab workers can use it to reduce manual arithmetic errors. Researchers can use it as a first-pass planning aid before confirming the design with the relevant protocol, reagent datasheet, or analysis software.

For background reading, see this trusted reference: supporting educational source.

SDS-PAGE Gel Helper worked example

Given a 55 kDa protein, the tool recommends about a 10% resolving gel and calculates approximate component volumes from the selected gel volume.

The result should be treated as a planning estimate. Always verify critical lab calculations independently before using them in real experiments.

For related planning, you may also use the Protein Molecular Weight Calculator or compare the next step with the Western Blot Dilution Calculator.

Practical questions about SDS-PAGE Gel Helper

Can I use this result directly in an experiment?

Use the result as a careful planning estimate. Recheck important values with your protocol, instrument settings, and reagent documentation.

Why does the tool show warnings?

The warnings catch common mistakes such as missing required values, impossible negative values, unsuitable sequence characters, or values outside a typical screening range.

Does the tool replace experimental validation?

No. It supports calculation and screening, but final biological performance depends on the sample, assay, protocol, and experimental controls.