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10 toolsConvert between world currencies using up-to-date exchange rates. Supports 150+ currencies.
Estimate federal estate tax liability based on asset value, exemptions, and deductions.
Calculate the purchasing power of money across time using real U.S. CPI data from 1913 to 2026.
Calculate your Body Mass Index using US or Metric units. Includes gauge chart and WHO classification table.
Estimate your body fat percentage using the U.S. Navy method with measurements for men and women.
Calculate your daily calorie needs based on age, weight, height, and activity level using the Mifflin-St Jeor equation.
Calculate logarithms in any base — natural log (ln), log base 10, log base 2, or any custom base.
Solve quadratic equations (ax² + bx + c = 0) with step-by-step workings and discriminant analysis.
Calculate the final price after applying a discount percentage or fixed amount. Find savings instantly.
Calculate profit margin, markup percentage, and gross profit for any product or service.
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