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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New to diabetes? Start here
Type 1 vs type 2 diabetes
A side-by-side table of cause, onset, treatment and more.
Signs of diabetes
Symptoms by type, and why many people notice none.
Newly diagnosed with type 2
A first-steps checklist saved in your browser, printable.
Types of diabetes
Type 1, type 2, gestational, LADA, MODY and type 3c in short sections.
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.
Diabetes blog directory
Active blogs, podcasts, channels and forums, checked before listing.
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.
Mounjaro cost
List price, Lilly savings card and Medicare Part D costs.
GLP-1 cost
Ozempic and Mounjaro prices, self-pay and savings, from the makers.
Metformin cost
What pharmacies pay per tablet, from CMS data.
Insulin cost
Medicare’s $35 cap and the maker programs.
Insulin savings programs
Pick your insurance type to find official insulin programs.
Diabetes supply cost calculator
Strips, CGM, insulin and pump supplies: cash against insured, monthly and yearly.
HSA-eligible diabetes supplies
What the IRS says about insulin, test kits and CGMs.
Medicare test strips
Strip and lancet limits, prescriptions and the 20% cost.
eGFR calculator
CKD-EPI 2021 eGFR from creatinine, with KDIGO stages.
Blood pressure chart
AHA categories, the ADA goal and a printable log.
Cholesterol ratio calculator
Total/HDL and LDL/HDL, with what guidelines say.
Waist-to-height ratio
Waist divided by height, with the NICE bands.
BMI calculator
BMI with the ADA diabetes screening note. No weight goals.
1-hour glucose test
The 50-gram screening test in pregnancy, and the ACOG cut-offs of 130, 135 and 140.
3-hour glucose test
The 100-gram diagnostic test, with Carpenter-Coustan and NDDG cut-offs side by side.
Glucose tolerance test
The OGTT in and out of pregnancy: 75 g, 100 g, preparation and cut-offs.
Gestational diabetes numbers
ADA pregnancy targets and a check of where a reading falls.
Gestational diabetes diet
Plate, carbohydrate spread and a pregnancy sample week for the planner.
Gestational diabetes log
A private log with pregnancy targets and meal tags, printable.
Gestational diabetes after birth
The postpartum test at 4 to 12 weeks and screening every 1 to 3 years.
Prediabetes risk test
The official CDC risk test, with an explainer of what each question is about.
Diabetes Prevention Program
The CDC National DPP and how to find a program near you.
Can prediabetes be reversed?
What the evidence says about returning to the normal range.
Type 1 vs type 2 diabetes
A side-by-side table of cause, onset, treatment and more.
Signs of diabetes
Symptoms by type, and why many people notice none.
Newly diagnosed with type 2
A first-steps checklist saved in your browser, printable.
Types of diabetes
Type 1, type 2, gestational, LADA, MODY and type 3c in short sections.
Diabetic socks
What to look for in socks, from CDC and NIDDK foot care advice.
Diabetic shoes
Fit facts and the Medicare therapeutic shoe benefit.
Medical alert bracelet for diabetes
Why wear medical ID, what to put on it and what to look for.
Insulin cooling case
The temperature limits and what a travel case has to do.
How to store insulin
Unopened and in-use storage by insulin type, from FDA data.
TSA and diabetes supplies
What TSA says about insulin, pumps, CGMs and screening.
Diabetes travel checklist
A checklist by trip length, flights, time zones and insulin use. Printable.
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.