How Many Days Until Christmas?
Countdown calculator for Christmas date.
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Working Days Between Dates
Calculate working days Mon–Fri between two dates.
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Rule of 72
See how fast something doubles based on interest.
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Simple APR ↔ APY Converter
Convert APR to APY and vice versa instantly.
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Quick Percentage Helper
Percentage addition, subtraction, and more.
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Quick Tip & Bill Splitter
Split bills, tips, and payments easily.
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Date Add/Subtract & Difference
Add/subtract days or calculate date difference.
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Age & Next Birthday Calculator
Find age in years, months, days + next birthday.
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