Finance blog

Free body fat percentage calculator using the US Navy circumference method — accurate to about 3% for healthy adults.

Free GPA calculator on a 4.0 scale. Enter grades and credits for up to four courses to see your weighted grade point average.

Free markup calculator — turn any cost and markup percentage into a selling price and profit. Includes the markup-vs-margin warning.

Free percentage change calculator — instantly find the percent increase or decrease between any two numbers.

Free compound interest calculator — enter principal, rate, frequency, and years to see your future balance and total interest earned.

Free loan EMI calculator — see your monthly payment, total interest, and total cost for any loan amount, rate, and term.

Free BMI calculator using metric units. Instantly classifies your body mass index against CDC categories.

Free sales tax calculator — works for any US state or local rate. Returns the tax amount and the after-tax total instantly.

Free tip calculator — splits any restaurant bill instantly with a custom tip percentage and per-person totals.

Free discount calculator — enter price and discount percent to instantly see your savings and the final sale price. Formula and worked example...