Time-Sensitive Calculator
Emergency Contraception Calculator
Find out which emergency contraception options are still available to you and their effectiveness based on timing.
Time is Critical!
Emergency contraception is most effective when taken as soon as possible. If you need EC, please act quickly and consult a healthcare provider.
Enter Your Information
The first day you started bleeding in your last period
Understanding Emergency Contraception
Levonorgestrel (Plan B / i-Pill)
Progestin-only emergency contraceptive pill available over-the-counter
Effective up to 72 hours
Ulipristal Acetate (Ella)
Selective progesterone receptor modulator - prescription required
Effective up to 120 hours
Copper IUD (Cu-T 380A)
Most effective emergency contraception - inserted by healthcare provider
Effective up to 120 hours
Key Points:
- • EC works best when taken as soon as possible after unprotected sex
- • EC pills prevent pregnancy - they do NOT cause abortion
- • Copper IUD is the most effective form of emergency contraception
- • EC does NOT protect against sexually transmitted infections
- • EC should not be used as a regular form of contraception