With this correcting for arrows calculator, you can calculate the number of units of insulin to adjust a dose, based on the trend arrows of your CGMS (Dexcom G6®, Medtronic Enlite 2®/Guardian 3™, or FreeStyle Libre® 1 or 2) and your correction/sensitivity factor (ISF, in mmol/L or mg/dL). 

Alternatively, using your carb ratio (in grams), you can adjust your carbohydrate intake to offset the predicted rise or fall in blood glucose with time. 

These calculations are only to be used before meals and snacks, and 3 or more hours after the previous insulin dose was given, to avoid insulin stacking. These calculations are not valid for use in children under the age of 2 years. Calculations do not account for active insulin/insulin-on-board, nor for activity! Based on Laffel LM et al. J Endocr Soc 2017;1(12):1461–1476.

With this full insulin scale calculator, you can generate a full insulin sliding scale for people on multiple daily injections, based on carb ratio (which must be between 4–60 grams), correction/sensitivity factor (ISF, which must be between 1–20 mmol/L or 18–360 mg/dL), and target blood glucose (the default is 6 mmol/L or 100 mg/dL). 

Insulin doses are rounded off (using a cut-off of 80%, not 50%) to the nearest half-unit. Calculations do not account for active insulin/insulin-on-board, nor for activity! 

You can export the resulting table to a CSV file, which can be opened in any spreadsheet program (Microsoft Excel, Google Sheets, Mac OS Numbers, etc.).

With this simple bolus calculator, you can do a simple insulin bolus calculation for people on multiple daily injections, based on carbohydrate ratio (in grams), correction/sensitivity factor (ISF, in mmol/L or mg/dL), target blood glucose (the default is 6 mmol/L or 100 mg/dL), current measured blood glucose (in mmol/L or mg/dL), and carbs to be consumed (in grams). 

Insulin doses are rounded off to the nearest half-unit. Calculations do not account for active insulin/insulin-on-board, nor for activity! ‎

With this simple insulin scale calculator, you can create a simplified insulin sliding scale for people on a fixed amount of carbs at a meal, based on baseline insulin dose (the dose they get when their blood glucose is in target), correction/sensitivity factor (ISF, which must be between 1–20 mmol/L or 18–360 mg/dL), and target blood glucose (the default is 6 mmol/L or 100 mg/dL). 

By ticking the box for “Extra Carbs”, you can add/subtract carbs for variations from normal. 

Insulin doses are rounded off (using a cut-off of 80%, not 50%) to the nearest half-unit for ISF 2–20 mmol/L (36–360 mg/dL), and to the nearest unit for ISF 1–1.9 mmol/L (18–35 mg/dL). Calculations do not account for active insulin/insulin-on-board, nor for activity!