KDP Royalty Calculator
See what you earn per sale on Amazon.com for a paperback or Kindle eBook, after printing and delivery costs.
Open KDP Royalty CalculatorCalculators
Quick, clear calculators for everyday numbers: age, dates, percentages, GPA and CGPA, loans, prices and margins, plus tools for authors and YouTubers.
Age Calculator
Your exact age in years, months and days from your date of birth, plus a countdown to your next birthday.
Open Age CalculatorPercentage Calculator
Work out X% of a number, what percent one number is of another, and percentage increase, decrease or difference.
Open Percentage CalculatorGPA Calculator
Calculate GPA on the US 4.0 scale, SSC and HSC GPA for Bangladesh, and university CGPA on the UGC scale.
Open GPA CalculatorDays Between Dates
Count days, weeks, months and working days between two dates, or add days to a date.
Open Days Between DatesEMI Calculator
Monthly loan instalment (EMI), total interest and a month-by-month repayment table for home, car and personal loans.
Open EMI CalculatorDiscount Calculator
Sale price and savings after a percent-off discount, with an optional extra discount and tax.
Open Discount CalculatorProfit Margin Calculator
Profit, margin and markup from cost and price, or the price you need for a target margin.
Open Profit Margin CalculatorMarkup Calculator
Selling price from cost plus markup, and the markup and margin of any price.
Open Markup CalculatorKDP Cover Size Calculator
Spine width and full paperback cover size with bleed for Amazon KDP, in inches, mm and pixels.
Open KDP Cover Size CalculatorWord Count to Pages
How many pages your words fill: single or double spaced, or as a printed 6×9 or 5×8 book.
Open Word Count to PagesYouTube Money Calculator
Estimate YouTube earnings from views and RPM, per video, per day and per month, for long videos and Shorts.
Open YouTube Money Calculator