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Age Calculator Pick a birth date and get your age in completed years. Instant, private, no signup required. Date Difference Calculator Pick a start and end date to see how many days lie between them—useful for deadlines, travel plans, and project gaps. Hours Minutes Calculator Convert hours plus minutes into decimal hours and a total minute count. Instant updates, no signup. Unix Timestamp Converter – Seconds or milliseconds to dates Convert a Unix timestamp to UTC ISO and local time. Accepts seconds or 13-digit milliseconds in your browser.