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Urea ↔ BUN Converter

Result

Converted Value5 mmol/L (urea)
↗ Health

Urea ↔ BUN Converter — free online calculator.

Formula

Urea (mmol/L) = BUN (mg/dL) × 0.357; Urea (mg/dL) = BUN (mg/dL) × 2.14
  • Urea ↔ BUN Converter calculates its result from Bun Mg Dl. It uses the formula Urea (mmol/L) = BUN (mg/dL) × 0.357; Urea (mg/dL) = BUN (mg/dL) × 2.14. Change any input to recalculate the result instantly. This is an informational calculation and is not medical advice.
  • The main inputs are Value, Convert. Enter them in the units and format shown in the calculator.
  • Use the measurement units shown beside each field. The result is an estimate and should be interpreted in context.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: Urea ↔ BUN

Inputs
  • Value: 14
  • Convert: bun_urea

Using Bun Mg Dl = 10, the calculated result is 21.4.

Sample result: Calculating…

Frequently asked questions

What does the Urea ↔ BUN calculate?

Urea ↔ BUN Converter — free online calculator.

Which values should I enter?

Enter Value, Convert using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: Urea (mmol/L) = BUN (mg/dL) × 0.357; Urea (mg/dL) = BUN (mg/dL) × 2.14.

Why might my result differ from another source?

Results can differ because measurement methods, rounding and assumptions vary. This calculator is an estimate and is not a medical diagnosis.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 10, 2026