About
Lab-Tacular is a set of laboratory calculators that run entirely in your browser.
Working out a dilution factor, computing molarity, fitting a standard curve, evaluating quality control data — these are daily tasks in a laboratory. Most people handle them with hand-built spreadsheet formulas, or by moving between several ageing web tools. Units get entered in the wrong place; numbers get mistyped on the way from one tool to the next.
This site exists to reduce that.
How this site works
Every calculation happens in your browser.
Nothing you type is sent to a server. There is no database and no account system. Laboratory measurements and quality control records are not values that should leave your machine.
Formulas come with their reasoning.
Each tool page carries more than the calculator itself: why the equation holds, and what to watch for in practice. An answer you can judge is more useful than an answer you simply receive.
The tools do not pass judgement.
Purity ratios and coefficients of variation are shown alongside reference ranges, but the site does not mark results as passing or failing. Those thresholds depend on your laboratory and your assay, and setting them is your call.
Who made this
J. Chang
B.S. in Biotechnology, Korea University
IVD Software Verification Specialist
I work in verification for in-vitro diagnostic software. Checking whether a calculation returns the right answer is my job, and these tools were built the same way. Each calculation passes an automated test suite against hand-computed expected values before it goes live.
This is a personal project, built and run independently of any employer.
Scope and limits
The tools on this site are intended to support calculations for research and laboratory work.
- They are not designed for medical diagnosis or treatment decisions
- There is no facility for entering patient information, and none should be entered
- This is not a regulated medical device and has not been validated as one
- Final responsibility for verifying any result rests with the user
Where your laboratory's standard operating procedures differ from the guidance here, follow your procedures.
Found something wrong?
If a formula is incorrect, or a note does not match practice, please tell me. I will check it and fix it.
Contact: contact@lab-tacular.com