About A1C Calculator

We build free, accurate diabetes tools to help people understand their A1C and blood sugar results — without the medical jargon.

Why We Built This

Millions of people receive an A1C result every year and have no clear way to understand what it means in everyday terms. A number like "7.5%" is medically significant — but most people don't know what it translates to in terms they recognize from their glucose meter.

We built A1C Calculator to close that gap. Our tools convert A1C to estimated average glucose (eAG) in mg/dL and mmol/L, show where results fall on the clinical spectrum, and explain what that means in plain English — all without requiring a login or paying anything.

Our Values

🎯
Accuracy First
Every calculator uses validated formulas from the ADA, NIH, and peer-reviewed research. We cite our sources.
🔓
Always Free
No paywalls, no signups, no premium tiers. All tools are free to use for anyone, anywhere.
🔒
Privacy by Design
We never see your health numbers. All calculations run locally in your browser — nothing is sent to our servers.
💬
Plain English
Results come with clear explanations, not just numbers. We write for real people, not medical professionals.

Our Sources

Our calculators and guides are based on guidelines and research from:

American Diabetes Association (ADA) — ADAG formula, A1C targets, clinical guidelines
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK / NIH) — diagnostic criteria
World Health Organization (WHO) — international diabetes standards

Referencing these organizations does not imply their endorsement of this Site.

Who We Are

We are the A1C Calculator Team — a small group of developers and health content writers passionate about making medical information accessible. We are not healthcare providers. Our tools are educational resources, not medical devices.

For medical advice specific to your situation, always consult a qualified healthcare professional.

Get in Touch

We welcome feedback, corrections, and suggestions. If you notice an inaccuracy in any of our tools or guides, please let us know — accuracy matters to us.

📧 [email protected]