Quick, accurate answers for dates and everyday percentage maths.
Exact age in years, months and days — plus your next birthday.
Find a precise age between two dates in years, months and days, along with total days lived, the weekday you were born on and how long until the next birthday.
Open Age CalculatorFour percentage modes, each with a step-by-step explanation.
Work out a percentage of a number, what fraction one number is of another, percentage change, and percentage difference — with the working shown so you can check it.
Open Percentage CalculatorTools in this category state their processing location on each page. Browser-based tools never send your input to us. Server-assisted tools (daily horoscope and birth chart) accept only the data needed for that request and do not store birth details. Saved invoices are stored only when you explicitly press Save, behind an unlisted random link.
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