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Free, visual, educational curves for meals and rapid-acting insulin. Not medical advice. Not for real-world dosing decisions.
Simulation inputs
This is an educational model, not a recommendation. Values are in
mg/dL and grams of carbs. Use this page when you’ve already eaten.
minutes ago
0 = you’re at the meal time now. 30 = you ate 30 minutes ago.
Showing curve starting at meal time (0 min ago). X-axis is minutes from now.
mg/dL
g carbs
mg/dL per g carb
Rough estimate of how much your BG rises per gram of carbs.
Target range (for shading only)
The shaded range shows a learning zone around your chosen BG goal
40 mg/dL below and 40 mg/dL above that number is the preset that is being used But never below 50 or above 300:
Lower Target = max(50, Target BG − 40)
Upper Target = min(300, Target BG + 40)
This does not represent personal medical advice.
mg/dL
mg/dL
g carbs per unit
Example: 1 unit for every 10 grams of carbs → enter 10.
mg/dL per unit
How much 1 unit usually lowers your BG (Optional). See
How it works then come back and enter that number here.
units
Show curves for different timing:
Quick examples
Glucose curve (from now)
Approximate BG response for the rest of the 3 hours after a meal.
X-axis shows minutes from right now.
Meal only
–
Pre-bolus
–
Bolus at meal
–
Post-meal bolus
–
Are your numbers different?
Ex. If the curve drops below 70 mg/dL but in real life you were higher than that,
it usually means the I:C or ISF in the simulator are too strong for you.
Try using a larger I:C (more grams per unit) or a smaller ISF
(fewer mg/dL per unit) so the curve better matches what you actually see.
No insulin modeled for this scenario.
Safety note: GlucoseCurve is an education tool only.
It uses a simplified model and does not reflect your
personal insulin needs or real-world blood glucose. Do not use this
site to choose real insulin doses, change your treatment, or manage
emergencies. Always follow the plan from your healthcare team.