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About us

About NursingCalc

NursingCalc.com was built with one goal: to give every nurse instant access to accurate, verified clinical calculators — completely free, with no login, no ads in the way, and no friction at the bedside.

"Every nurse deserves a fast, reliable clinical calculator — at the bedside, in the classroom, and everywhere in between."

Our mission

Nursing is one of the most mathematically demanding professions in healthcare. On a single shift, a nurse may need to calculate drug doses, IV drip rates, fluid balances, body surface areas, and renal function — often under time pressure, on a phone, with a patient waiting.

Existing tools were either buried behind paywalls, cluttered with ads, poorly designed for mobile, or formulaically inaccurate. NursingCalc was built to fix all of that. Every calculator is free, works on any phone or tablet, loads instantly, and is sourced from peer-reviewed clinical literature.

What we stand for

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Clinical accuracy first
Every formula is sourced from peer-reviewed medical literature or international clinical guidelines. We do not invent or modify formulas.
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Built for the bedside
Nurses work on phones. Every calculator is optimised for one-handed mobile use, with large inputs and instant results.
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Free, always
No paywalls. No registration. No premium tiers. Every calculator on NursingCalc will remain free to use forever.
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International by default
Our tools support both metric and imperial units. Blood sugar converts between mg/dL and mmol/L. Temperature converts between Celsius and Fahrenheit.

How we verify our formulas

Every formula used in NursingCalc is sourced from one of the following: a peer-reviewed clinical study, a pharmacological reference, or an internationally recognised clinical guideline. We list the primary reference for each calculator on its page, and a complete reference list is available on our nursing cheat sheet.

Our primary sources include:

1
Cockcroft-Gault (CrCl)Cockcroft DW, Gault MH. Nephron. 1976;16(1):31–41.
2
MDRD eGFRLevey AS, et al. Ann Intern Med. 1999;130(6):461–470.
3
Mosteller BSAMosteller RD. N Engl J Med. 1987;317(17):1098.
4
Devine IBWDevine BJ. Drug Intelligence & Clinical Pharmacy. 1974;8:650–655.
5
Parkland FormulaBaxter CR, Shires T. Ann N Y Acad Sci. 1968;150(3):874–894.
6
BMI ClassificationWorld Health Organization. Technical Report Series 894. Geneva: WHO; 2000.
7
Naegele's Rule (EDD)Mittendorf R, et al. Obstet Gynecol. 1990;75(6):929–932.

Who uses NursingCalc

NursingCalc is used by registered nurses, student nurses, nursing educators, midwives, paramedics, and other allied health professionals worldwide. Our tools are designed for quick clinical reference during shifts, nursing school study, and exam preparation.

Contact us

We welcome feedback, formula corrections, and tool suggestions from nurses and healthcare professionals. If you spot an error in any calculator or want to suggest a new tool, please get in touch — we read every message.

⚠️ NursingCalc tools are for educational and reference purposes only. Always verify results with your institution's clinical protocols and a qualified healthcare professional before any clinical decision.