Glucose Calculator – Convert & Monitor Blood Sugar Levels
The Glucose Calculator allows you to convert blood sugar levels between mg/dL (milligrams per deciliter) and mmol/L (millimoles per liter). It’s an essential tool for individuals managing diabetes, healthcare professionals, and lab technicians working with international units.
How to Use the Glucose Calculator
Choose your input unit and enter the value:
- mg/dL (commonly used in the US)
- mmol/L (commonly used internationally)
The calculator instantly converts the value and provides a reference range for normal, prediabetic, and diabetic levels.
Conversion Formula
From mg/dL to mmol/L: mmol/L = mg/dL ÷ 18
From mmol/L to mg/dL: mg/dL = mmol/L × 18
Example
Blood sugar = 126 mg/dL
→ mmol/L = 126 ÷ 18 = 7.0 mmol/L
This indicates diabetes (fasting level ≥ 126 mg/dL).
Blood Sugar Levels Reference
| Status | mg/dL | mmol/L |
|---|---|---|
| Normal (Fasting) | 70 – 99 | 3.9 – 5.5 |
| Prediabetes | 100 – 125 | 5.6 – 6.9 |
| Diabetes | 126+ | 7.0+ |
Common Use Cases
- Daily glucose tracking for diabetics
- International unit conversion for lab reports
- Nutrition and insulin adjustment planning
- Health monitoring apps and medical charts
Why Use a Glucose Calculator?
Blood glucose units vary between countries. This tool helps convert readings instantly and avoid misinterpretation — critical for safe diabetes management.
Frequently Asked Questions (FAQs)
What’s the difference between mg/dL and mmol/L?
They measure the same thing but in different units. mg/dL is used in the US; mmol/L is standard internationally.
Is fasting sugar the same as post-meal?
No, fasting sugar is taken 8+ hours after eating. Post-meal sugar is usually higher.
Can this be used for gestational diabetes?
Yes, the reference values apply to all blood glucose monitoring, including pregnancy-related diabetes.
What is hypoglycemia?
Blood sugar below 70 mg/dL (3.9 mmol/L) — can lead to shakiness, sweating, confusion, or fainting.
How often should I check blood sugar?
Depends on your condition — consult your doctor. Many diabetics check fasting and post-meal levels daily.
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