BUN ↔ Urea Converter
Convert between US 'BUN' (mg/dL nitrogen) and the urea (mmol/L) the rest of the world reports — two names, one test.
A genuine source of confusion: the US measures blood *urea nitrogen* (just the nitrogen atoms) while most countries report whole *urea* — so the names AND units differ. BUN(mg/dL) × 0.357 = urea(mmol/L), or divide by 2.8. Anchors: BUN 14 mg/dL ≈ urea 5.0 mmol/L. To convert BUN to urea in mg/dL instead, multiply by 2.14.
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.
Convert between US 'BUN' (mg/dL nitrogen) and the urea (mmol/L) the rest of the world reports — two names, one test. The BUN ↔ Urea Converter is a free, private bun to urea tool — every result computes instantly in your browser with no sign-up and no data upload.
About BUN ↔ Urea Converter
A genuine source of confusion: the US measures blood *urea nitrogen* (just the nitrogen atoms) while most countries report whole *urea* — so the names AND units differ. It applies mmol/L (urea) = mg/dL (BUN) ÷ 2.8 (molar-mass factor). Use the BUN ↔ Urea Converter 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 BUN ↔ Urea Converter
- 1Enter your details in the BUN ↔ Urea Converter 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 BUN ↔ Urea Converter?
- ✓Instant bun to urea 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 (AMA Manual of Style — urea/BUN conversion)
- ✓Free forever with no sign-up, account or app install
Frequently asked questions
How does the BUN ↔ Urea Converter work?+
A genuine source of confusion: the US measures blood *urea nitrogen* (just the nitrogen atoms) while most countries report whole *urea* — so the names AND units differ. The calculation uses the formula: mmol/L (urea) = mg/dL (BUN) ÷ 2.8 (molar-mass factor). Everything runs instantly in your browser as you type — your inputs are never uploaded.
Is the BUN ↔ Urea Converter accurate, and what is it based on?+
The method is traceable to authoritative sources: AMA Manual of Style — urea/BUN conversion. Results are estimates — individual variation always applies, so treat the output as a well-grounded starting point.
Is the BUN ↔ Urea Converter 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 BUN ↔ Urea Converter for?+
It's commonly used for bun to urea, bun mg/dl to mmol/l, urea converter. Convert between US 'BUN' (mg/dL nitrogen) and the urea (mmol/L) the rest of the world reports — two names, one test.
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