Paste your topic, aim and objectives. The assistant finds similar published studies, checks every number against the paper, and writes your sample size calculation with references, ready for your synopsis.
Free: 3 assistant searches a day, and the calculator without limits. No sign-up. No patient data needed.
Prevalence 27% (Kumar et al., 2024), precision ±7%, 95% confidence: 155 from the formula, 173 after 10% non-response.
Start with sample size today. New tools will join the same website, so your topic and numbers carry forward from one step to the next.
Paste your topic and objectives. It finds published values, shows the sentence each number came from, and writes the calculation, a short version for the ethics committee and likely viva questions.
Beta. 3 free searches a day. Open the assistantNine study designs, every working step, honest feasibility checks and a Word write-up with references. For when you already have the values.
Open the calculatorTurns your topic, objectives and sample size into a synopsis draft in your university's format.
Upload your data; the right test runs, assumptions are checked and the results are written up.
Introduction, review of literature, methods, results and discussion, with every citation checked against PubMed.
A manuscript in IMRaD format, built from your thesis and formatted for the journal you choose.
A conference poster and a presentation, made from the same results and references.
Or upload your synopsis. The assistant checks your aim and objectives and chooses the study design, with its reasons.
It searches PubMed, reads the abstracts and shows each value with the sentence it came from. Pick the study that fits your setting.
Formula, steps, final number and references in Word, in your university's font and margins, plus viva notes.
Charan & Biswas, Kelsey, Fleiss, Buderer and others, checked against hand calculations and published tables.
The write-up shows the formula, each input with its source, and every line of the calculation.
Every value the assistant uses appears word for word in the published abstract, with a link to PubMed.
If your hospital sees fewer patients, the calculator shows the precision or power you can achieve, instead of bending the formula.
Designed around the questions postgraduate students bring to a statistics department every week.
Yes. The calculator is free without limits, and the assistant gives 3 free searches a day. No account is needed.
From published studies similar to yours: the prevalence, mean, standard deviation or correlation they report. The assistant finds them on PubMed, or you enter a value yourself in the calculator. Either way the study is cited and added to the reference list.
The AI only copies numbers from abstracts. A number is used only if the sentence it was copied from appears word for word in the abstract and contains that number; anything else is dropped. All arithmetic is done by tested formulas, not by the AI.
Yes. Download it as a Word file, and check the design and values with your guide before you submit.
The calculator runs in your browser and sends nothing to us. The assistant sends your text to the AI to be read; we keep your topic, without your name, only if you tick the box that allows it. The privacy policy has the details.
Choose “What my patients allow”. The calculator works out the precision or power that number gives and writes it up as a limitation, instead of changing your inputs.