Blood Sugar Converter | mg/dL ↔ mmol/L (Fast & Accurate)

A Blood Sugar Converter instantly translates glucose readings between the two most common units worldwide—mg/dL to mmol/L and mmol/L to mg/dL—so patients, caregivers, and clinicians can understand results consistently. In the United States and a few other regions, glucose is usually displayed as mg/dL (milligrams per deciliter). In Canada, the UK, Australia, and much of Europe, glucose values are shown in mmol/L (millimoles per liter). If you compare research, follow international guidelines, or change devices or locations, you’ll run into both units. That’s why a fast, precise blood glucose conversion is essential.

Blood Sugar Converter (mg/dL ↔ mmol/L)

Convert blood glucose instantly and precisely. Choose your unit, add a value, and see both units plus a context-based interpretation.

Enter value in

mg/dL mmol/L

Blood sugar value

You can type 95 (mg/dL) or 5.3 (mmol/L). Commas are ok (e.g., 5,3).

Measurement context (optional)

Decimal places

Clinical displays usually use 0–1 dp for mg/dL and 1–2 dp for mmol/L.

mg/dL

—

milligrams per deciliter

mmol/L

—

millimoles per liter

Important: This educational tool does not provide medical advice, diagnosis, or treatment. Always consult a qualified health professional about your results or symptoms.

Converter uses a precise glucose factor (≈ 18.0182) for accuracy. Rounding is for display only.

Our Blood Sugar Converter uses the established conversion factor based on glucose’s molar mass: 1 mmol/L ≈ 18.0182 mg/dL. That means:

mg/dL to mmol/L → divide by 18.0182 (often approximated as 18)
mmol/L to mg/dL → multiply by 18.0182

By integrating unit math directly in the page, your conversions are instant, private, and accessible on any device. While this glucose converter is extremely accurate for unit translation, remember it’s an educational tool—not a diagnostic device or medical advice.

How the Blood Sugar Converter (mg/dL ↔ mmol/L) works—simple, precise, transparent

The math under the hood is straightforward and transparent:

mg/dL → mmol/L mmol/L=mg/dL18.0182\text{mmol/L} = \frac{\text{mg/dL}}{18.0182}mmol/L=18.0182mg/dL
mmol/L → mg/dL mg/dL=mmol/L×18.0182\text{mg/dL} = \text{mmol/L} \times 18.0182mg/dL=mmol/L×18.0182

Because the Blood Sugar Converter uses the precise 18.0182 factor (rather than a rounded 18), your results are as exact as the input allows. You can also choose the number of decimal places for clean display, which aligns with how many clinics show blood glucose conversion results (e.g., mg/dL typically 0–1 decimal place; mmol/L typically 1–2).

Our tool additionally offers context tags—fasting, post-meal (2 hours), and random—to show educational ranges. These ranges are informational only and not personalized medical targets. Always confirm your individual goals with a qualified clinician.

When should you convert mg/dL to mmol/L (and vice versa)?

You’re reading international resources or studies.
Many journals and guidelines outside the US present results in mmol/L. The Blood Sugar Converter lets you compare apples to apples quickly.
You changed your glucose meter or app.
If your device shows mmol/L but your logs (or your clinician’s preferences) use mg/dL, the glucose converter ensures consistency.
You moved countries or travel often.
For global patients, a diabetes calculator that supports mg/dL to mmol/L and mmol/L to mg/dL helps maintain a unified personal record.
You collaborate with a global care team.
Dietitians, endocrinologists, and diabetes educators may prefer different units. The Blood Sugar Converter bridges that gap.

Interpreting results (educational ranges only)

Interpretation depends on timing (fasting vs. after eating), medication, activity, illness, and clinical goals. As an orientation (not medical advice):

Fasting (usually after 8+ hours):
Many references describe around 70–99 mg/dL (≈ 3.9–5.5 mmol/L) as a typical adult fasting interval.
Post-meal (about 2 hours):
You may see references to below 140 mg/dL (≈ <7.8 mmol/L) as a typical 2-hour target in some guidelines.

Your clinician may set different targets based on age, pregnancy, comorbidities, and therapy plan. Our Blood Sugar Converter displays ranges to educate, not to diagnose or treat.

Important: Symptoms matter. Hypoglycemia (low) or hyperglycemia (high) with symptoms should be handled per your clinician’s plan. Always follow professional advice.

How to use the Blood Sugar Converter for the best experience

Choose your input unit: mg/dL or mmol/L.
Enter your glucose value (decimals allowed; commas like “5,3” are recognized as 5.3).
Optionally select a context—fasting, post-meal, or random—to view educational notes.
Pick decimal places for display consistency (common: 0–1 for mg/dL, 1–2 for mmol/L).
Use Copy results to paste your conversion into personal notes or a message to your clinician.

Real-world examples of blood glucose conversion

95 mg/dL → mmol/L:
95÷18.0182≈5.2795 \div 18.0182 \approx 5.2795÷18.0182≈5.27 mmol/L
7.8 mmol/L → mg/dL:
7.8×18.0182≈140.547.8 \times 18.0182 \approx 140.547.8×18.0182≈140.54 mg/dL
180 mg/dL → mmol/L:
180÷18.0182≈9.99180 \div 18.0182 \approx 9.99180÷18.0182≈9.99 mmol/L

These examples show why the Blood Sugar Converter matters: clinical teams and apps can speak the same “unit language” even if they’re in different countries.

Blood Sugar Converter vs. diabetes calculator—what’s the difference?

A diabetes calculator often estimates risk or helps with dosage or time-in-range analytics. A Blood Sugar Converter focuses strictly on blood glucose conversion: mg/dL to mmol/L and mmol/L to mg/dL. If you need broader diabetes tools, explore these additional calculators and trackers on My Medicine Advisor:

Diabetes Risk Assessment Tool – educational risk screening (not diagnosis)
Medicine Dosage Calculator – dosage math helper
Blood Pressure Tracker – track and interpret blood pressure
BMI Calculator – body mass index
BMR Calculator – basal metabolic rate
Fever Tracker & Temperature Log – record and review fever trends
Kidney Health Checker – educational kidney health insights

Accuracy, rounding, and best practices

Exact factor: Using 18.0182 keeps the Blood Sugar Converter accurate for both mg/dL to mmol/L and mmol/L to mg/dL conversions.
Rounding: Choose 0–3 decimal places to match how you present results to your doctor or in your logbook.
Device variation: Meter calibration, test strip quality, temperature, and timing can affect raw readings. Unit conversion does not fix device variability—always use clinical judgement.
Consistency: Pick one unit standard (mg/dL or mmol/L) for your logbook and convert new entries with the glucose converter as needed.

External resources

Reputable reading that your editors can link to from phrases like “diabetes guidelines,” “glucose monitoring,” or “hypoglycemia”:

American Diabetes Association (ADA) – diabetes standards, patient education
World Health Organization (WHO) – global diabetes overview
Centers for Disease Control and Prevention (CDC) – diabetes basics and prevention
NHS (UK) – patient-friendly diabetes information
Diabetes Canada – mmol/L-focused guidance

Accessibility and global usability

A great Blood Sugar Converter should work for everyone. This page is mobile-first, keyboard-navigable, and readable with high color contrast. Numbers accept decimal separators used in different locales (e.g., 5,3 recognized as 5.3), helping global audiences convert mg/dL to mmol/L and mmol/L to mg/dL without friction.

Privacy and data handling

This glucose converter computes locally in your browser. No sign-in, no tracking to run the math, and no storage of your entries. Use Copy results to paste into your private notes or share with your care team as you choose.

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Frequently Asked Questions (FAQ)

How do I convert mg/dL to mmol/L?

Use the Blood Sugar Converter formula: mmol/L = mg/dL ÷ 18.0182. Example: 90 mg/dL ≈ 4.996 mmol/L (≈ 5.00 mmol/L at 2 decimals).

How do I convert mmol/L to mg/dL?

Multiply by 18.0182: mg/dL = mmol/L × 18.0182. Example: 7.8 mmol/L ≈ 140.54 mg/dL.

Why do some countries use mg/dL and others use mmol/L?

It’s historical and regional. The US commonly uses mg/dL, while many other countries use mmol/L. A glucose converter helps unify your records.

What’s a “normal” fasting blood sugar in mg/dL and mmol/L?

Adults often see ~70–99 mg/dL (≈ 3.9–5.5 mmol/L) described as typical fasting range. Targets vary—follow your clinician’s plan.

What is a typical 2-hour post-meal value?

Some references cite <140 mg/dL (≈ <7.8 mmol/L). Your target may differ depending on age, medications, pregnancy, or comorbidities.

Does rounding affect my clinical decisions?

Use rounding for display clarity; keep raw values in your logs if your clinician prefers exact decimals. The Blood Sugar Converter lets you pick decimal places.

Can I enter values with commas?

Yes. Entering 5,3 is treated as 5.3 in our Blood Sugar Converter.

Is this a diabetes calculator for diagnosis?

No. This is a blood glucose conversion utility. It does not diagnose, treat, or monitor disease.

What if I have symptoms of low or high blood sugar?

Follow your clinician’s emergency instructions. Seek urgent help for severe symptoms.

Can I copy and share my results?

Yes—use Copy results to paste your mg/dL to mmol/L or mmol/L to mg/dL conversions into notes or messages.

The Blood Sugar Converter and all content on My Medicine Advisor are for educational purposes only and not medical advice. For diagnosis, treatment, and personalized targets, work directly with a qualified healthcare professional.