Rule of Nines Calculator (Burn Area)
Tick the burned regions, get %TBSA — the rapid estimation chart with the palm rule built in.
For scattered patches, the patient's own palm-with-fingers ≈1% TBSA and often estimates better than nines. Children break the adult proportions (bigger heads, shorter legs — Lund–Browder charts correct this). The estimate gates real decisions: burn-centre referral (≥10–20% by criteria), Parkland fluids, and the consistent finding that bedside estimates run high — count only blistered-or-worse skin.
Formula
Reference aid for healthcare professionals only. Every result must be independently verified before clinical use. Never use this tool for self-medication or to replace clinical judgement.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
Tick the burned regions, get %TBSA — the rapid estimation chart with the palm rule built in. The Rule of Nines Calculator (Burn Area) is a free, private rule of nines tool — every result computes instantly in your browser with no sign-up and no data upload.
About Rule of Nines Calculator (Burn Area)
For scattered patches, the patient's own palm-with-fingers ≈1% TBSA and often estimates better than nines. It applies adult: head 9, each arm 9, torso 18+18, each leg 18, perineum 1. Use the Rule of Nines Calculator (Burn Area) to get an instant, clearly-explained result with the working shown step by step — free, private and with the source method cited.
How to use Rule of Nines Calculator (Burn Area)
- 1Enter your details in the Rule of Nines Calculator (Burn Area) input fields above.
- 2The result updates instantly with the working and reference bands shown.
- 3Adjust any value to explore how it changes the outcome — it's free and unlimited.
Why use Rule of Nines Calculator (Burn Area)?
- ✓Instant rule of nines result that recomputes as you type — no waiting, no page reloads
- ✓100% client-side: your health data never leaves your browser
- ✓Shows the actual formula and your numbers substituted in, so you can see exactly how the result is reached
- ✓Based on published, citable sources (Wallace AB 1951 — rule of nines; Lund & Browder 1944)
- ✓Free forever with no sign-up, account or app install
Frequently asked questions
How does the Rule of Nines Calculator (Burn Area) work?+
For scattered patches, the patient's own palm-with-fingers ≈1% TBSA and often estimates better than nines. The calculation uses the formula: adult: head 9, each arm 9, torso 18+18, each leg 18, perineum 1. Everything runs instantly in your browser as you type — your inputs are never uploaded.
Is the Rule of Nines Calculator (Burn Area) accurate, and what is it based on?+
The method is traceable to authoritative sources: Wallace AB 1951 — rule of nines; Lund & Browder 1944. Results are estimates — individual variation always applies, so treat the output as a well-grounded starting point.
Is the Rule of Nines Calculator (Burn Area) free and private?+
Yes. It's completely free with no sign-up, and all computation happens locally in your browser, so none of your health data ever leaves your device.
Can I use this for medical decisions?+
This is a reference aid for healthcare professionals and must be independently verified. It is not for self-diagnosis or self-medication.
What can I use the Rule of Nines Calculator (Burn Area) for?+
It's commonly used for rule of nines, tbsa calculator, burn percentage. Tick the burned regions, get %TBSA — the rapid estimation chart with the palm rule built in.
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