Glycemic Load Calculator
See how a real serving of a food affects blood sugar — find foods by search, barcode, or photo.
Free Blood Sugar & Glycemic Calculators
GlucoMath is a small, free collection of blood sugar and glycemic math tools. Every calculator runs in your browser with no sign-up, and each one cites the published formula or dataset behind it. Pick a tool below to get started.
Glycemic Index Calculator
Check a food's GI value and whether it counts as low, medium, or high.
GMI Calculator
Turn a CGM average glucose into a Glucose Management Indicator.
A1C to eAG Calculator
Convert an A1C percentage into estimated average glucose, in mg/dL or mmol/L.
Blood Sugar Converter
Move between mg/dL and mmol/L instantly, in both directions.
Glucose to A1C Estimator
Estimate an A1C range from your average blood glucose readings.
A note on health decisions
These calculators are educational tools, not medical devices. Numbers they produce are estimates built on published averages, so talk with your care team before changing diet, medication, or monitoring routines based on anything you compute here.
Want to know where our GI data and formulas come from? The about page lists every source, the open-source license, and how to reach us.