Diabetes & Blood Sugar Calculators
Free tools for people with Type 1, Type 2 or prediabetes. Each one shows its formula and the guidelines it comes from.
Glycemic Targets & Unit Converters
A1C conversions, fasting glucose benchmarks, OGTT glucose tolerance, and unit converters.
A1C Converter
Convert your HbA1c percentage into Estimated Average Glucose (eAG) in mg/dL and mmol/L using the official American Diabetes Association (ADAG) formula.
mg/dL ⇋ mmol/L
Instantly convert glucose values between US (mg/dL) and international (mmol/L) units with real-time ADA diagnostic category interpretation.
Fasting Glucose Evaluator
Check whether your morning fasting glucose reading is normal, prediabetic (impaired fasting glucose), or indicative of diabetes.
Random Glucose Evaluator
Evaluate any casual blood glucose reading taken without fasting against ADA clinical thresholds and urgent symptom markers.
OGTT Evaluator
Interpret your 2-hour 75g oral glucose tolerance test results for impaired glucose tolerance and gestational screening.
Fructosamine Converter
Convert 2–3 week fructosamine lab values into estimated HbA1c equivalents for conditions where standard A1C is unreliable (anemia, pregnancy, hemoglobin variants).
Low Blood Sugar
The Rule of 15: what to do when your blood sugar is below 70 mg/dL.
Postprandial & Food Dynamics
Post-meal spikes, net carbs deduction, glycemic load, protein gluconeogenesis, and alcohol risk.
Post-Meal Spike Evaluator
Measure the exact glycemic delta between your pre-meal baseline and 1-hour or 2-hour postprandial readings.
Net Carbs Calculator
Calculate true glycemic carbohydrate load by deducting insoluble fiber and adjusting for partial sugar alcohol absorption.
Glycemic Load Calculator
Compute the real-world Glycemic Load of a meal serving by combining Glycemic Index with total available carbohydrates.
Protein Glucose Estimator
Estimate the delayed 3-to-5 hour blood sugar climb resulting from hepatic gluconeogenesis after large protein or keto meals.
Alcohol Risk Estimator
Estimate the duration of liver gluconeogenesis suppression caused by alcohol to protect against delayed overnight low blood sugar.
Carb Budget Calculator
Calculate personalized daily carbohydrate gram targets based on your caloric intake across Low-Carb, Moderate, Keto, and ADA guidelines.
Metabolic Risk & Clinical Biomarkers
HOMA-IR insulin resistance, QUICKI sensitivity, GKI ketosis index, and ADA prediabetes risk test.
HOMA-IR Calculator
Calculate your Homeostatic Model Assessment of Insulin Resistance (HOMA-IR) from fasting glucose and fasting insulin lab tests.
QUICKI Calculator
Calculate the Quantitative Insulin Sensitivity Check Index (QUICKI) to evaluate your tissue insulin sensitivity with logarithmic precision.
GKI Calculator
Compute your Glucose-Ketone Index to track therapeutic ketosis, metabolic health, and autophagy levels.
Prediabetes Risk Test
Official American Diabetes Association 7-question validated risk screening tool: find out your personalized prediabetes risk in 60 seconds.
Hyperglycemia Hydration
Estimate fluid loss from osmotic diuresis during elevated blood sugar spikes above the renal threshold (> 180 mg/dL).
Companion app for iPhone
Snap your meals and see what they do to your blood sugar
T1dApp turns food photos and glucose readings into clear, everyday patterns. Get carbs in seconds, an estimate of your blood sugar 2 hours later, and Dexcom and Libre readings through Apple Health.
- Snap meals with AI: see carbs, calories, and an expected 2-hour glucose range.
- Apple Health sync: import Dexcom and FreeStyle Libre CGM readings automatically.
- Meal impact insights: see which foods spike your blood sugar and which barely move it.
- Estimated A1c & reports: export clean PDF or CSV summaries to hand your care team.
iPhone & iPad · Built for Type 1, Type 2, and Prediabetes
