MasterTool

Blood Sugar Converter

Convert blood glucose values between mg/dL and mmol/L — unit conversion only, with no interpretation of the value.

Loading calculator…

What this tool does

Convert blood glucose values between mg/dL and mmol/L — unit conversion only, with no interpretation of the value. Unit conversion ONLY. This tool does not classify, diagnose or advise on any glucose value. Reference ranges differ by fasting state, test and individual targets — discuss values with your clinician.

How to use the Blood Sugar Converter

  1. Enter or select glucose value.
  2. Enter or select entered unit.
  3. Read the calculated result; change any measurement to compare alternatives.

Formula

mmol/L = mg/dL × 0.0555; mg/dL = mmol/L ÷ 0.0555 (standard glucose conversion factor)
value
Glucose value
from
Entered unit

Unit conversion ONLY. This tool does not classify, diagnose or advise on any glucose value. Reference ranges differ by fasting state, test and individual targets — discuss values with your clinician.

Worked example

For blood sugar converter, the following measurements illustrate the exact method: Glucose value: 100; Entered unit: mgdl.

Inputs

  • Glucose value100
  • Entered unitmg/dL

Result

  • mg/dL100
  • mmol/L5.55

Results explained

mg/dL
mg/dL from the formula above. Unit conversion ONLY. This tool does not classify, diagnose or advise on any glucose value. Reference ranges differ by fasting state, test and individual targets — discuss values with your clinician.
mmol/L
mmol/L from the formula above. Unit conversion ONLY. This tool does not classify, diagnose or advise on any glucose value. Reference ranges differ by fasting state, test and individual targets — discuss values with your clinician.

Frequently asked questions

Multiply by 0.0555. 100 mg/dL × 0.0555 = 5.55 mmol/L. To go back, divide mmol/L by 0.0555.

The US and some other countries report glucose in mg/dL; most of the world uses mmol/L. They measure the same thing in different scales — this tool only converts the number.

It derives from glucose's molar mass (180.16 g/mol): 1 mg/dL equals 0.0555 mmol/L. It is the standard factor used by laboratories and meter manufacturers.

This converter deliberately does not classify values — 'normal' depends on fasting vs post-meal timing and individual targets set by clinicians. Ask your care team what range applies to you.

No. It performs unit conversion only and gives no medical interpretation. Act on readings using the plan agreed with your clinician.