A lab report lives or dies on structure — the reader needs to know what you measured, how, what happened, and what it means, in that order, with enough detail to judge the reasoning. This lab report template gives you the full IMRaD scaffold (Introduction, Methods, Results, Discussion) with APA 7 as the default citation style, word-count ranges per section, and bracketed placeholders throughout. It works for undergraduate biology, chemistry, physics, and psychology experiments, and it scales up for capstone and journal-style reports. Drop your data into the placeholders, keep observation separate from interpretation, and you have a lab report that follows the conventions your grader expects.
PaperDraft is a writing assistant, not a paper generator — the template is free. The draft is your starting point, not your submission. You are responsible for editing, verifying sources, and following your school's academic integrity policy.
What this template includes
- Title page and abstract scaffold (150–250 words) with placeholders for key numerical results
- Introduction block with a labeled hypothesis statement
- Methods section split into Participants/Materials, Apparatus, Procedure, and Analysis subsections
- Results section with figure and table placeholders and explicit "report, do not interpret" guidance
- Discussion scaffold covering hypothesis assessment, error analysis, and limitations
- Conclusion and References sections, APA 7 formatted, with IEEE as an alternate for engineering
- Section-by-section word-count ranges totaling roughly 1,800 words for an undergraduate report
Lab report template — copy the structure
Copy the block below into your document and fill every bracketed placeholder. Delete the italic guidance lines before submission.
Title: [Informative, specific title — e.g., "Measuring the Heat of Combustion of Ethanol by Bomb Calorimetry"]
Author: [Your name] Course: [Course code and section] Lab partner(s): [Names] Date of experiment: [YYYY-MM-DD] Date submitted: [YYYY-MM-DD]
Abstract (150–250 words)
[One sentence stating the purpose of the experiment.] [One or two sentences naming the method — apparatus, sample, key procedure.] [Two or three sentences reporting the key numerical result with units and uncertainty, e.g., "The measured value was X plus or minus Y units."] [One or two sentences stating the interpretation and conclusion.] No citations, no figures, one paragraph.
1. Introduction (250–400 words)
[Paragraph 1: Theoretical background. Two to four sentences establishing the scientific context of the experiment, with one or two citations to textbook or lab-manual sources.]
[Paragraph 2: The specific question. Name the variable or quantity you are measuring and why it matters for the theory just established.]
Hypothesis: [State the hypothesis in one sentence, in the form "If X, then Y, because Z" or "We hypothesized that the measured value would equal the literature value within experimental uncertainty."]
[One-sentence preview of approach: "To test this, we used [method] to measure [quantity] across [N] trials."]
2. Methods (300–500 words)
2.1 Participants / Materials
[List chemicals with concentrations and purities, or participant demographics with sample size. Use the form "N equals [number]" rather than the less-than symbol followed by a digit.]
2.2 Apparatus
[Instruments used, with manufacturer, model, and stated precision. Example: "Temperature was measured with a Type-K thermocouple (Omega HH801A, precision plus or minus 0.1 degrees Celsius)."]
2.3 Procedure
[Numbered or paragraph-form description of the procedure, past tense, conventionally passive voice in chemistry and biology. Include timing, order of operations, controls, and any deviations from the standard protocol. Enough detail that a competent reader could replicate.]
2.4 Analysis
[Describe how raw data was processed — averaging across trials, error propagation, regression, statistical tests. Name the software used if relevant.]
3. Results (400–550 words)
[Opening sentence with the key numerical result. Example: "The measured heat of combustion was negative 1352 plus or minus 18 kilojoules per mole, averaged across three trials."]
[Reference Figure 1 and Table 1 in the narrative. Example: "Figure 1 shows the temperature-time curves for all three trials; Table 1 summarizes per-trial values."]
Figure 1. [Caption: brief descriptive title followed by a sentence explaining axes, units, and any annotations. Place the figure above or below the caption per your course's convention.]
Table 1. [Caption: descriptive title. Columns: Trial, [Measured Quantity] with units, Uncertainty. Include a notes row if any trial deviated from protocol.]
[Additional paragraphs as needed, each presenting a specific result with appropriate precision and uncertainty. Report, do not interpret — "the temperature rose by 12.3 plus or minus 0.4 degrees Celsius" belongs here; "this suggests an exothermic reaction" belongs in Discussion.]
4. Discussion (400–550 words)
[Paragraph 1: Restate the main finding in one sentence and relate it to the hypothesis. "The measured value supported / partially supported / did not support the hypothesis."]
[Paragraph 2: Comparison with expected values from theory or prior work. Cite the literature value and give the percentage deviation.]
[Paragraph 3: Error analysis. Name the specific uncertainty sources — instrument precision, timing drift, parallax, sample preparation — and estimate the magnitude of each. "Human error" and "equipment error" do not count as error analysis.]
[Paragraph 4: Limitations and implications. What the result does and does not show, and what a follow-up experiment could address.]
5. Conclusion (80–150 words)
[One paragraph restating the main numerical finding, its significance relative to theory or application, and the single most important limitation. Some courses fold this into Discussion — check the brief.]
6. References (APA 7)
[Alphabetical by first-author surname, hanging indent, double-spaced.]
[Example journal article] Smith, J. R., and Jones, K. L. (2021). Heats of combustion in calorimetry. Journal of Chemical Education, 98(4), 512–530. https://doi.org/10.1021/example
[Example textbook] Author, A. A. (Year). Title of textbook (Nth ed.). Publisher.
[Engineering labs: use IEEE numeric style [1] [2] instead. See the IEEE citation guide if your course specifies it.]
Appendix A — Raw Data
[Raw values, detailed calculations, supplementary figures that support but do not belong in the main text.]
How to use this template
1. Confirm the format your course expects
Read the lab manual before you copy the template. Some departments expect Methods broken into subsections exactly as shown; others want a single Methods paragraph. Adjust the template to match, then delete the unused subheads.
2. Fill Methods from your lab notebook first
Open your notebook next to the document. Copy materials, apparatus, sample sizes, and procedural steps into the placeholders. Methods is factual and descriptive, which makes it the easiest section to draft and the best starting point.
3. Present Results without interpreting them
Drop numerical values with units and uncertainty into the Results placeholders. Reference each figure and table in the prose. Save all interpretation — what the numbers mean, why they matter, whether they support the hypothesis — for the Discussion section.
4. Build the Discussion around the hypothesis
State whether the data supported, partially supported, or did not support the hypothesis. Compare with expected values from theory or prior work using percentage deviation. Then analyze specific error sources by name and estimate their magnitudes.
5. Write the Introduction after Methods and Results
The Introduction is shorter and easier to write once you know what the report actually contains. Keep it to 250–400 words: theoretical context, specific question, hypothesis, and a one-sentence preview of the approach.
6. Write the Abstract last
Summarize the whole report in one paragraph: purpose, method, key result with numbers, conclusion. Under 250 words. No citations, no figures. You can only summarize a report that already exists.
7. Verify every reference
Open each cited source and check the author spelling, year, DOI, and issue number element by element. Citation errors are the most common preventable loss of points. For APA specifics see our APA citation guide. For the broader writing process see how to write a lab report.
Section-by-section guide
Title
Informative and specific — not "Experiment 4" or "Lab Report." Name the quantity measured and the method used. "Measuring the Heat of Combustion of Ethanol by Bomb Calorimetry" tells the reader what to expect.
Abstract
One paragraph summarizing the full report: purpose, method, key numerical result with units and uncertainty, conclusion. Keep under 250 words. Cite nothing, include no figures, and avoid the phrase "this report" — name what you measured.
Introduction
Two short paragraphs of theoretical context and specific question, a clearly stated hypothesis, and a one-sentence preview of the approach. Do not rehash the lab manual — cite it once and synthesize the rest.
Methods
Four subsections are standard: Participants/Materials, Apparatus, Procedure, and Analysis. Use past tense and enough detail that a competent reader could replicate the experiment. Justify non-obvious choices like concentration or control conditions.
Results
Lead with the main finding. Reference every figure and table in the prose. Numerical results carry appropriate precision and error. Do not interpret here — that is the Discussion's job.
Discussion
Four moves in order: restate the main finding, assess the hypothesis, compare with theory or prior work, analyze error sources by name. Limitations and implications close the section.
Conclusion
One short paragraph restating the finding and its significance. Some courses fold this into Discussion — check the brief.
References
APA 7 by default, with hanging indent and alphabetical order. Engineering reports often use IEEE numeric style instead. Match your discipline's convention and verify every entry.
Common mistakes to avoid
- Mixing Results and Discussion. "The value rose by 12.3 degrees" is Results; "this indicates an exothermic reaction" is Discussion. Keep the wall.
- Vague error analysis. "Human error" is not an error source. Name the specific mechanism (parallax, timing drift, instrument precision) and estimate its magnitude.
- Thin Methods. If a classmate could not replicate the experiment from your Methods, it is too thin. Concentrations, sample sizes, timing, and settings are not optional.
- Recycling the lab manual. Quoting the manual verbatim without citation is a potential integrity issue; see our academic responsibility guide. Cite the manual once and synthesize the rest.
- Burying the main finding. The key numerical result should appear in the first two sentences of Results and again in the first sentence of Discussion. Do not make the reader hunt.
Frequently asked questions
Is using this lab report template plagiarism?
No. A structural template — headings, section order, placeholders — is not copyrightable and is not plagiarism. The IMRaD structure is a shared scientific convention, not one author's work. What has to be yours is the experimental data, the analysis, the writing, and the citations. Fill the template with your own work and you are on solid ground.
What citation style should I use?
Depends on the discipline. Biology, chemistry, and psychology typically use APA. Engineering labs use IEEE. Physics often uses a numeric style similar to IEEE. Check the lab brief before citing, because retrofitting a style mid-report is visible and costly.
How long should a lab report be?
Undergraduate reports run 1,200 to 3,000 words. This template targets roughly 1,800 words across the main sections. Capstone and journal-style reports run longer. The brief sets the target; exceeding it by more than about 10% is usually a scope problem.
Do I need a separate Conclusion section?
Course-dependent. Some briefs require a standalone Conclusion; others fold it into Discussion. Check the brief and delete or keep the section accordingly.
Can I use AI to help write my lab report?
Policies vary and matter particularly in lab courses, where integrity lines are drawn tightly around data and analysis. Most programs allow AI for structural scaffolding and prose polish but prohibit AI-generated Methods (which must describe what you actually did) and Discussion (which must reflect your reasoning). Disclose use per your course policy — see our AI disclosure guide.
What goes in the Appendix versus the main text?
Main text holds the figures and tables you reference in Results. Appendices hold raw data, extended calculations, and supplementary figures that support but do not belong in the main narrative. If a figure is essential to the argument, it belongs in the main text.