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Free A1C to Blood Sugar Converter (ADAG Formula) | 2026

Free A1C to Blood Sugar Converter (ADAG Formula) | 2026

A1C to Average Blood Sugar

Convert A1C percentage to estimated average glucose (eAG) using the ADAG study formula (ADA 2024)
%
mg/dL
mmol/L
5.0% 5.7% 6.5% 7.0% 8.0% 9.0%
🟢 NORMAL
Normal Pre Diabetes Poor

📋 A1C to eAG reference (ADA)

A1C % eAG (mg/dL) eAG (mmol/L)
5.0%97 mg/dL5.4 mmol/L
6.0%126 mg/dL7.0 mmol/L
7.0%154 mg/dL8.6 mmol/L
8.0%183 mg/dL10.2 mmol/L
9.0%212 mg/dL11.8 mmol/L
10.0%240 mg/dL13.4 mmol/L
💡 UNDERSTANDING YOUR A1C
Your A1C shows your average blood sugar over 2‑3 months, but it does NOT reflect daily swings or hypoglycemia. For a complete picture, combine A1C with daily glucose monitoring (fingerstick or CGM) and regular healthcare visits.
⚠️ FACTORS THAT CAN AFFECT A1C ACCURACY
Falsely high: iron deficiency, vitamin B12/folate deficiency, longer red blood cell lifespan.
Falsely low: hemolytic anemia, recent blood loss, transfusions, kidney disease, certain genetic conditions.
Discuss with your doctor if these apply.

📅 RECOMMENDED TESTING SCHEDULE

• Well‑controlled (A1C <7%): every 6 months
• Not at goal (≥7%): every 3 months
• After medication changes: repeat in 3 months

⚕️ MEDICAL DISCLAIMER: This calculator provides estimates based on the ADAG study formula. It does not diagnose diabetes, replace lab testing, or guide treatment decisions. Always consult your healthcare provider for diagnosis, medication adjustments, and management. In case of emergency, call 911 immediately.

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