Convert laboratory HbA1c between NGSP (%) and IFCC (mmol/mol), translate A1C into estimated average glucose (eAG), compute CGM Glucose Management Indicator (GMI), check glucose variability (CV% and SD), and print structured log sheets.
Supports mg/dL, mmol/L, NGSP (%), and IFCC (mmol/mol) with published equations shown on every tool.
Translate laboratory NGSP HbA1c (%) into estimated average glucose (eAG) in both mg/dL and mmol/L using the Nathan et al. (2008) ADAG linear regression equation.
eAG (mg/dL) = 28.7 × A1C (%) − 46.7; eAG (mmol/L) = eAG (mg/dL) / 18.0182Convert laboratory HbA1c results between IFCC standard units (mmol/mol, used in the UK, Europe, and Australia) and NGSP/DCCT percentage units (%, used in the US and Canada) using the published NGSP/IFCC master equation.
NGSP (%) = 0.09148 × IFCC (mmol/mol) + 2.152; IFCC (mmol/mol) = (NGSP (%) − 2.152) / 0.09148Convert blood glucose values between milligrams per deciliter (mg/dL) and millimoles per liter (mmol/L) using the exact molar mass factor of glucose (18.0182).
mmol/L = mg/dL / 18.0182; mg/dL = mmol/L × 18.0182Calculate your Glucose Management Indicator (GMI) in both NGSP-aligned % and IFCC-equivalent mmol/mol from your continuous glucose monitor (CGM) mean glucose using the published Bergenstal et al. (2018) formula.
GMI (%) = 3.31 + 0.02392 × [mean glucose in mg/dL]; GMI (mmol/mol) = (GMI (%) − 2.152) / 0.09148Paste a list of glucose readings (separated by commas, spaces, or newlines) to compute arithmetic mean, population standard deviation (SD), coefficient of variation (CV%), min/max, and count of entered readings within your selected target range.
Mean = (1/N) Σx_i; SD = √[(1/N) Σ(x_i − Mean)²]; CV (%) = 100 × SD / MeanCreate a clean, clinic-ready weekly or monthly paper log sheet for blood glucose (mg/dL or mmol/L) and blood pressure (mmHg + pulse) — either as a blank printable template for your refrigerator/clipboard or pre-filled with readings.
Structured A4 / US Letter printable log sheet (blank template or pre-filled from entered readings)Understand why laboratory HbA1c is reported in mmol/mol (IFCC) in some countries and % (NGSP) in others, how the master conversion equation works, and how each level maps to estimated average glucose (eAG).
A well-structured paper or PDF log turns scattered numbers into clear daily patterns. Here is what to write down next to each glucose and blood pressure reading.
Continuous glucose monitoring (CGM) reports include a Glucose Management Indicator (GMI) expressed as a percentage. Learn the exact formula behind GMI and why a difference of 0.3% to 0.5% or more between GMI and lab HbA1c is common.
Two glucose logs can have the exact same average of 140 mg/dL while feeling completely different day to day. Learn how Standard Deviation (SD) and Coefficient of Variation (CV%) quantify glucose swings.
Traveling with a glucometer or reading international studies often requires switching between milligrams per deciliter (mg/dL) and millimoles per liter (mmol/L). Here is the exact chemistry and reference table.