Urea / BUN Unit Converter (BUN mg/dL ↔ Urea mmol/L)

Urea / BUN Unit Converter (BUN mg/dL ↔ Urea mmol/L) | Online Free Tool | Elysia Tools

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category: Health
Input types: number, select
Output type: json
Sample coverage: 4
API ready: Yes

Overview

Convert a BUN value in mg/dL to urea in mmol/L, or convert urea in mmol/L back to BUN in mg/dL using the factor 0.357. Choose the input and target units, enter a value, and set the desired decimal places. This tool is for unit conversion only and is not medical advice.

When to use

Convert BUN results reported in mg/dL into urea values in mmol/L for SI-unit reporting.
Convert urea results in mmol/L into BUN values in mg/dL for comparison with conventional US laboratory values.
Standardize renal laboratory values when reviewing results from sources that use different units.

How it works

1Enter the numeric laboratory value in the Value field.
2Select the input unit: BUN (mg/dL) or Urea (mmol/L).
3Select the target unit for the conversion.
4Choose the number of decimal places from 0 to 8, then review the JSON result.

Use cases

Laboratory result review across regions using conventional mg/dL or SI mmol/L units.
Nephrology and lab medicine calculations that require BUN and urea values in a consistent unit.
Checking reported values when comparing clinical references that use different unit systems.

Examples

1. Convert an upper-range BUN result to urea

Clinician or laboratory professional

Background

A report lists BUN as 20 mg/dL, but the comparison reference uses urea in mmol/L.

Problem

Convert the BUN result into the corresponding urea unit with two decimal places.

How to use

Enter 20 as the value, select BUN (mg/dL) as the source unit, select Urea (mmol/L) as the target unit, and set decimal places to 2.

value: 20; sourceUnit: bun; targetUnit: urea; decimalPlaces: 2

Outcome

The converter returns 7.14 mmol/L urea using 20 × 0.357.

2. Convert a high urea result to BUN

Laboratory professional

Background

A laboratory result reports urea as 25 mmol/L, while another reference uses BUN in mg/dL.

Problem

Express the urea result in BUN units for direct comparison.

How to use

Enter 25 as the value, select Urea (mmol/L) as the source unit, select BUN (mg/dL) as the target unit, and set decimal places to 2.

FAQ

What units does this converter support?

It converts BUN in mg/dL and urea in mmol/L in either direction.

What formula converts BUN to urea?

Urea mmol/L = BUN mg/dL × 0.357.

What formula converts urea to BUN?

BUN mg/dL = urea mmol/L ÷ 0.357, using an inverse factor of approximately 2.801.

How many decimal places can I display?

You can select from 0 to 8 decimal places; the default is 2.

Is this a medical diagnostic tool?

No. It performs unit conversion only and does not provide medical advice or diagnosis.

value: 25; sourceUnit: urea; targetUnit: bun; decimalPlaces: 2

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Continue with connected tools and hubs

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Convert an upper-range BUN result to urea

2. Convert a high urea result to BUN

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