Using the results
The tools describe the specific populations and years printed with their results. They are not official government services, identity verification, genealogical proof, medical advice or predictions about an individual. Sources can contain omissions, editing decisions and historical coverage limits. The service is provided as available, without a promise of uninterrupted access or universal accuracy.
Sharing
You may download and share your result cards. Keep the source and period visible so others can interpret the figures. Share only personal information you are comfortable making public and have the right to use. The service does not post to social media on your behalf.
Source material
Birthday calculations adapt FiveThirtyEight’s SSA compilation under CC BY 4.0. The original SSA and Census counts are government statistical data. Source links, calculation changes and limitations are explained in the methodology. No source agency endorses the service.
Problems and changes
Please report source or calculation problems. We may correct or update the site when better evidence becomes available. A card already downloaded to a device will not change automatically; check the current site and source period before reusing an old result. Privacy explains the handling of inputs, website delivery and analytics.