Free diabetes tools that do the math right.
A drag-and-drop meal planner, a carb counter, A1C and blood sugar tools and food guides, built from official sources. No sign-up, and nothing you type leaves your device.
- Every number sourced and dated
- Your data never leaves your device
- No miracle cures, ever
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Start with a tool
Meal planner
Drag-and-drop week planner with a plate that fills itself.
Carb counter
Add up the carbs in a meal, then send it to the planner.
A1C calculator
A1C to average blood sugar and back, in mg/dL and mmol/L.
Blood sugar chart
Published ADA and CDC ranges in mg/dL and mmol/L, with a quick check and a printable page.
Blood sugar log
A private log in your browser with a printable sheet and CSV export.
A1C chart
A1C, eAG and mmol/mol from 4% to 14%, printable.
A1C of 5.7
What 5.7% means and what the CDC suggests next.
A1C of 6.5
The diagnostic threshold, and why a second test is needed.
A1C of 7
The common ADA goal for adults, and who may have another.
How to lower A1C
What helps, how long it takes, and what to ask your team.
Fructosamine to A1C
What the test measures and why the numbers differ.
A1C home test kits
What FDA-cleared home kits do and do not replace.
Diabetic meal plan
The plate method, carb basics and three example weeks you can open in the planner.
Diabetic breakfast ideas
Breakfasts built around fiber and protein, with carbs per serving.
Diabetic desserts
Dessert ideas with carbs shown, and how a treat can fit.
Diabetic grocery list
A store-section shopping list you can print or build from your plan.
Net carbs calculator
Total carbs minus fiber from a label, with an honest note on the term.
Glycemic load calculator
GL from a food or from any GI and carb amount.
Best sweeteners for diabetes
Stevia, monk fruit, sugar alcohols and sugar: what each does to carbs.
Prediabetes diet
Eating patterns that help, built from CDC and NIDDK guidance.
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.
Low blood sugar symptoms
Signs of a low, the ADA levels, and when it is an emergency.
Rule of 15
The 15 grams, wait 15 minutes, recheck steps for a low, with sources.
Glucose tablets
What they are, grams per tablet, and how they compare with juice.
Glucagon
What glucagon is and the FDA-approved forms, from their labels.
Ketones in urine
What ketones are, when to test, and when to get urgent help.
Ketone levels chart
Blood ketone bands in mmol/L and urine strip categories.
DKA symptoms
Warning signs of diabetic ketoacidosis and why it is an emergency.
CGM comparison
Filterable table of CGMs and a facts-only finder. No rankings.
FreeStyle Libre 3 Plus
Who it is cleared for, wear days, pumps, price and Medicare notes.
Dexcom G7 and G7 15 Day
The 10-day and 15-day sensors, phone needs, pumps and cost.
Dexcom Stelo
The over-the-counter CGM for adults not on insulin.
Abbott Lingo
The over-the-counter biosensor: who it is for, price and wear.
FreeStyle Libre Rio
FDA-cleared over-the-counter CGM, and what we could not confirm.
Eversense 365
The one-year implanted sensor: who, how, price and coverage.
Over-the-counter CGM
Stelo, Lingo and Libre Rio compared: CGM without a prescription.
Dexcom G7 vs Stelo
The prescription and over-the-counter Dexcom sensors, side by side.
FreeStyle Libre 3 Plus vs Dexcom G7
Two prescription CGMs compared on the makers’ own facts.
Does Medicare cover a CGM?
The CMS rules, the 20% cost and the six-month visits.
No tool matches that yet. Try “A1C”.
What you can count on
Every number sourced and dated
Ranges and formulas come from the ADA, CDC, NIH and peer-reviewed papers, linked on the page with a review date.
Your data stays on your device
Calculators run in your browser. We never receive what you type.
No miracle cures, ever
No dosing tools, no diagnosis, no supplements. Just clear information to bring to your care team.
Popular guides
Diabetic meal plan
The plate method, carb basics and three example weeks you can open in the planner.
Diabetic breakfast ideas
Breakfasts built around fiber and protein, with carbs per serving.
How to lower A1C
What helps, how long it takes, and what to ask your team.
A1C of 5.7
What 5.7% means and what the CDC suggests next.
From the diabetes blog community
Real people write, podcast and post about life with diabetes. Our directory lists active blogs, podcasts, channels and forums, each checked before it is listed.