BGL & Ketones — Quick Reference Chart

Keep this as a simple reminder of when things are OK — and when to act fast.

Blood Glucose (BGL)

Range	What it Means	What to Do
4–7 mmol/L	Ideal before meals	✅ Safe
< 4 mmol/L	Hypo (low)	🚨 Treat with fast carbs
7–10 mmol/L	Acceptable after meals	Monitor
> 14 mmol/L	High	🚨 Check ketones, consider correction insulin

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Ketones

Level	What it Means	What to Do
< 0.6 mmol/L	Normal	✅ Safe
0.6–1.4 mmol/L	Mild rise	Recheck, hydrate, correction insulin
1.5–2.9 mmol/L	Moderate	Sick-day rules, increase monitoring
≥ 3.0 mmol/L	High DKA risk	🚨 Seek urgent medical help

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⚠️ Red Flags — get urgent help if:

• Ketones ≥ 3.0 mmol/L
• Vomiting or unable to keep fluids down
• Abdominal pain, rapid breathing, drowsiness
• BGL > 14 mmol/L and not coming down with correction

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Related Guides

• Blood Glucose and Ketones — What’s Normal, What’s Not
• Emergency Actions — Hypos, Highs, and Ketones