Blood sugar
Targets, units and what the numbers mean.
Blood sugar chart
Published ADA and CDC ranges in mg/dL and mmol/L, with a quick check and a printable page.
Blood sugar after eating
What the official numbers say about 1 to 2 hours after a meal, including 140 and 150.
Fasting blood sugar
The fasting ranges, and why morning readings can differ.
Dawn phenomenon
Why glucose can rise before breakfast, and how it differs from a rebound.
Blood sugar of 60
What 60 mg/dL means, what the CDC and NIDDK say to do, and when to get help.
Blood sugar of 200 after eating
Why 200 after a meal is above the ADA target and what it does and does not mean.
Blood sugar of 250
The CDC advice on checking ketones, and the warning signs that need urgent care.
Blood sugar of 300
When 300 mg/dL means emergency care, from CDC guidance.
Blood sugar converter
mg/dL and mmol/L, one value or a pasted list.
GMI calculator
Mean glucose to GMI, plus time in range from pasted readings.
Blood sugar log
A private log in your browser with a printable sheet and CSV export.