Plain-language posts about blood glucose, HbA1c and tracking, for people with diabetes or prediabetes and the people close to them. Each post explains what published guidance says and links to the sources it draws on. It is general information, not medical advice: talk to your care team about your own numbers and targets.
Free tool A1C to average glucose calculator Convert an A1C to estimated average glucose in mg/dL and mmol/L, or the other way round. Nothing you type is sent or stored.-
HbA1c: the three-month story behind your glucose numbers
What HbA1c measures, why it covers about three months, and why it never quite matches your daily readings.
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Time in range: how much of your day sits between two lines
What time in range means, where the commonly cited CGM targets come from, and how it works alongside HbA1c.
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Fasting, post-meal, random: why the same number can mean different things
What fasting, post-meal and random glucose readings are, and why timing changes what a number means.
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mg/dL or mmol/L? Same glucose, two ways to write it
Why glucose is written in mg/dL or mmol/L, how to convert between them, and a table of common values.
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Keeping a glucose log: one reading is a moment, a record is a story
Why a blood glucose log is worth keeping, what to write down with each reading, and why patterns say more than one number.
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Why your glucose moves: it's more than what you ate
Food, movement, illness, sleep, medicines and more all nudge glucose up or down: a plain-language tour of what published sources say.
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Glucose tracking apps: where the numbers come from
A glucose tracking app does not measure anything itself. Where its numbers come from, what it can do with them, and what it cannot.