Travel Time-Zone Adjustment Calculator

Times in your departure timezone (24-hour clock or AM/PM supported)

Your adjusted medication time is calculated by shifting your usual schedule by the exact time difference between your departure and destination timezone:

Eastward travel (clocks go forward) shortens your travel day. If you use insulin, a shorter day may mean less total basal insulin is needed - spread doses earlier and monitor closely.

Westward travel (clocks go back) lengthens your travel day. A longer day may require an extra small dose or snack to bridge the gap, especially with long-acting insulin.

For shifts greater than 3 hours, consider a gradual transition over 2-3 days rather than an abrupt switch. Always consult your diabetes care team before travelling across more than 4-5 time zones.

• Pack twice as much insulin and supplies as you think you need, divided between carry-on and checked luggage.
• Keep insulin at room temperature - away from direct sunlight or aircraft hold extremes. Use an insulated pouch.
• Carry a doctor's letter listing all medications, devices, and supplies (especially for airport security and customs).
• Inform airport security staff about your insulin pump or CGM before scanning - request a hand inspection.
• During long flights, check your blood glucose every 2-3 hours; cabin altitude can cause slight glucose fluctuations.
• Stay hydrated - aircraft cabin air is very dry and dehydration can raise blood glucose.
• Carry fast-acting carbohydrate in your hand luggage in case of in-flight hypoglycaemia.