Find a blood sugar levels chart at reputable online medical websites such as WebMD or Healthline. Diabetics should keep records when testing blood sugar levels, noting foods, exercise and medications, recommends WebMD. The blood sugar levels chart at WebMD shows target levels for diabetics before and after meals and exercise.
Healthline provides a downloadable blood sugar levels chart that diabetics can use to chart their blood glucose levels before and after meals. Charting blood glucose is key to managing diabetes, as Healthline notes. Factors that can affect blood glucose levels and that should be charted include activity levels, illnesses and infections, as well as meal times and medications taken.