What we do
We build clear, fast calculators for the questions that come up when you're trying to conceive, expecting, or finding your feet with a new baby: when am I most fertile, when is the baby due, how far along am I, what's happening this week, and what should I be sorting out next. Everything runs in your browser, there's nothing to sign up for and we don't store your dates.
Editorial standards
Our calculators use well-established methods (such as the 280-day count from your last period) and our guidance reflects typical UK NHS antenatal pathways. We aim to be accurate, plain-spoken and kind. Where a topic is sensitive or clinical, we point you to trusted sources like the NHS and Tommy's rather than offering opinions of our own.
This is not medical advice. Our results are estimates. Every pregnancy and cycle is different, and only a healthcare professional who knows your situation can give you personal advice. Always speak to your GP, midwife or health visitor about anything that matters to you.
Privacy
We designed HerCycleCalc to be private. Your dates and inputs are processed entirely on your device. Anything you "save" is stored in your own browser's local storage, it never reaches our servers, and clearing your browser data removes it. We don't ask you to create an account, and we don't track your individual figures.
Affiliate disclosure
Some links on this site, particularly in our "Essentials" sections and the "see picks" prompts, are affiliate links. If you click one and buy something, we may earn a small commission at no extra cost to you. This helps keep the calculators free. It never changes what we choose to feature, and we'll always show a "Sponsored" label so you know.
Who runs HerCycleCalc
HerCycleCalc is operated by Croft & Hugh Digital LTD. Spotted an error, or want a calculator we don't have yet? We'd genuinely love to hear from you, get in touch.
Croft & Hugh Digital LTD · Registered in England & Wales · Company No. 17207269 · Registered office: 71-75 Shelton Street, Covent Garden, London, WC2H 9JQ · Contact: Hello@crofthughdigital.co.uk