Free tool

Pill Travel Time Calculator

This calculator converts your usual home dose time to the equivalent clock time at your destination. It shows time conversion only, not a schedule recommendation.

Time zone conversion only. Does not generate a transition schedule or assess backup contraception need. Check your patient leaflet or speak to your pharmacist before changing your pill schedule.

1. What type of pill are you on?

Combined pill

Estrogen + progestin. Check your leaflet for your brand’s late or missed-pill instructions.

Traditional mini-pill

Norethindrone, norgestrel, norethisterone or levonorgestrel. These often have a strict 3-hour window.

Desogestrel mini-pill

Desogestrel 75mcg. Brands: Cerazette, Cerelle. Flexible 12-hour window.

Drospirenone-only pill

Drospirenone 4mg. Brands include Slynd and Slinda. It has different late or missed active-pill rules, so check your leaflet.

Choosing the wrong pill type can give the wrong timing guidance. If you're not sure, check the active ingredient on your packaging or ask your pharmacist.

2. What time do you usually take your pill at home?

3. When are you travelling? (time zones can change with daylight saving time)

The conversion uses the daylight-saving rules at your selected home dose time. On a daylight-saving changeover day, confirm the result with your airline, pharmacist or pill leaflet.

4. Your home time zone

5. Destination time zone

Your inputs stay on this page and are not saved.

This calculator converts your home dose time to the equivalent clock time at your destination. It does not generate a transition schedule or determine whether backup contraception is needed. It is not medical advice. Always consult your doctor or pharmacist for guidance specific to your situation and pill brand.

Track with Estroclic

Record your pill times at home and abroad

Estroclic records your pill times and sends reminders at your chosen time. When you update your reminder for a trip, the app logs the change so you have an accurate record of when you took each pill.

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