Blog4
Launch stories, how-to guides, and tips behind useKits.
calculatorsshopping
How to Calculate a Discount and Final Sale Price
Work out any discount in seconds — the percent-off formula, a worked example, how to stack discounts, and a free calculator that shows your final price and savings.
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calculatorsbusiness
How to Calculate Profit Margin (with a Free Calculator)
Profit margin made simple — the formula, the difference between margin and markup, a worked example, and a free calculator that also reverse-calculates your price.
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utilitieswriting
How to Count Characters, Words, and Bytes Online
Hitting a character limit? Here's how character, word, and byte counts differ — plus a free real-time counter for essays, bios, captions, and meta tags.
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launchmini games
Introducing Coin Flip — Decide in One Tap
Why we built a free online coin flip tool, how it works, and the everyday moments where a quick heads-or-tails saves you time.
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