Plate map maker · 8 × 12 grid
96-Well Plate Map
Plan and record what goes in every well. Build your 96-well plate map on screen and export it, or download a blank labelled grid (A1–H12) to fill in by hand.
Quick answer
A 96-well plate map records what occupies each of the 96 wells (A1–H12) of a plate: the samples, standards, controls, blanks and replicates in every position. Build one below by clicking wells to assign colour-coded groups, then export it as a PNG image or a CSV for your notebook or LIMS. A plate map is what turns a grid of raw reader values back into per-sample results.
Sample groups
Click or drag across wells to assign the active group. Click a row letter or column number to fill it. Toggle Well IDs to label each well, then export a PNG plate map or a CSV for your LIMS / notebook.
Download a blank 96-well plate map
Prefer paper? Grab the blank labelled grid in your format of choice and annotate it in the lab.
- A plate map names the contents of every well, A1–H12.
- Build it before pipetting; save it with the raw data.
- Group replicates, reserve a standard-curve column, mind edge effects.
- Export PNG for the bench and CSV to join to reader output.
What a plate map is and why it matters
A plate map documents the contents of each well before you pipette: samples, controls, standards, blanks and replicates, each in a known position. In an ELISA or qPCR run, the map is what turns a grid of raw reader values back into meaningful, per-sample results. Without it, a plate of numbers is unusable.
Plate-map best practices
- Keep replicates together: group technical replicates so pipetting is fast and errors are obvious.
- Reserve a standard curve: dedicate a column to standards for quantitative assays.
- Mind edge effects: outer wells evaporate faster; consider leaving them as blanks for sensitive assays.
- Include blanks and controls: always map positive, negative and blank wells explicitly.
- Save the map with the data: export and store it alongside raw reader output for traceability.
Those five rules cover the layout itself. The other half is checking the map before any liquid moves, when a fix still costs nothing:
| Check before pipetting | What it catches |
|---|---|
| A1 sits where you think it does on the physical plate | A map applied 180 degrees out, which mirrors every result |
| Replicate counts match the plan, well by well | A condition silently left with two wells instead of three |
| Controls, blanks and standards occupy their usual positions | Analysis scripts that look for the curve in a fixed column |
| Outer wells are assigned on purpose, as samples or as buffer | Evaporation quietly shifting the wells at the plate edge |
| Names are spelled identically across replicates | Joins and pivots that split one sample into two |
| The map is exported and filed before the run starts | A layout that exists only in someone’s memory by Friday |
New to well addressing? See how to read a 96-well plate and how to label one, and steer clear of common layout mistakes. For the printable grid, use the 96-well plate template.
Example: a typical ELISA plate map
The layout below is the one most quantitative immunoassays end up with. Column 1 carries the standard curve from highest to lowest, column 2 carries the blanks and controls, and the remaining ten columns hold samples in vertical duplicate pairs, giving 40 samples on one plate.
- Standard curve S1 to S8, high to low
- Blank, buffer and reagent only
- Negative control
- Positive control
- QC sample, same batch on every plate
- Samples in duplicate, pairs A/B, C/D ...
- Alternate sample pair, for readability
Three things make this layout worth copying. The standards sit on the same plate as the samples, so the curve absorbs plate-to-plate variation instead of hiding it. Every position is fixed, so analysis software finds the curve and blanks without being told twice. And duplicates sit next to each other vertically, so a pair that disagrees points at one pipetting step rather than a whole column.
Subtract the mean blank from every reading, fit the standards with a four-parameter logistic curve, and interpolate the samples from it. Keep one QC sample from the same batch on every plate: if its value drifts between runs, the problem is the assay, not the samples.
| Column | Contents |
|---|---|
| 1 | Standard curve S1–S8 (A1 highest → H1 lowest) |
| 2 | Blanks (A2, B2), negative controls (C2, D2), positive controls (E2, F2), QC sample (G2, H2) |
| 3–12 | Samples in duplicate (e.g. A3/B3 = sample 1) |
Frequently asked questions
What is a 96-well plate map?
A plate map is the record of what occupies each well of a 96-well plate: which sample, control, standard, blank or replicate sits at positions A1 through H12. It keeps an experiment organized and its data traceable.
How do I make a plate map?
Use the interactive designer on this page: choose the 96-well format, create sample groups, click or drag to assign wells, then export a PNG image or a CSV. Or download the blank grid and fill it in by hand.
How are wells numbered on a 96-well plate map?
Wells are addressed by row letter then column number on an 8 × 12 grid: rows A–H run top to bottom and columns 1–12 left to right, so wells run A1, A2 … through H12.
Can I export the plate map to Excel or a LIMS?
Yes. The designer exports a CSV listing each well and its assigned group, which imports directly into Excel, a spreadsheet or a LIMS.
What should a 96-well plate map include?
A complete plate map names the contents of every well (samples, standards, controls and blanks) plus replicate grouping and, ideally, a plate ID, date and operator. Keeping standards and controls in fixed positions on every plate makes analysis faster and less error-prone.
How do I lay out a standard curve on a plate map?
Dedicate a full column (for example column 1) to the standard curve, dispensing from highest concentration at A1 down to lowest at H1. Reserving the same column on every plate lets analysis software locate the curve automatically.
Can I make a plate map in Excel?
Yes. The downloadable Excel template has one cell per well on the 8 × 12 grid, so you can type sample names directly. For colour-coding and PNG/CSV export, the interactive plate designer is faster.