Contact us
Questions, corrections, broken links, or just want to say hello — we’d love to hear from you.
The fastest way to reach us is by email: [email protected].
We reply within one business day, Monday to Friday. Messages sent on weekends usually get a response Monday.
Best things to email about
- Corrections and bug reports. If a calculator output looks wrong, screenshot it and send the inputs. We’ll dig in.
- Accessibility issues. If something on the site is hard to use with a screen reader, keyboard, or any assistive tech, please tell us so we can fix it.
- Topic suggestions. A calculator we should build? A subject we should write about? We listen.
- Press, partnerships, and citations. If you’re writing about us or want to link to us, drop a note.
What we can’t do
We’re not medical professionals and can’t answer personal health questions. If you have a question about your cycle, fertility, pregnancy, or any other health concern, please speak with your healthcare provider — they know your history and can examine you. Period Tools is a planning and reference tool only.