Plan B Countdown Calculator

Know your timing

Plan B helps prevent pregnancy before it starts by delaying ovulation when taken within 72 hours (3 days) after unprotected sex. Wondering whether you’re within the window to take Plan B? Enter the date and time you had unprotected sex below.

When did you have
unprotected sex?

You have 72 hours left to take Plan B
It looks like you’ve missed the 72‑hour window to take Plan B. Please contact your current healthcare provider as soon as possible.

Need to find a store?

Plan B is available right off the shelf at major retailers like CVS, Walgreens, Target, Walmart, and more.

What you need to know about Plan B

  • Contains the same active ingredient as regular birth control pills—just at a single, higher dose
  • Emergency contraception that works by delaying ovulation
  • Won’t hurt your chances of getting pregnant in the future
  • The #1 OB/GYN recommended emergency contraception brand