GPA Calculator

BMI Calculator

Formula: BMI = weight(kg) / (height(m))²

Age Calculator

Loan / Mortgage Calculator

Monthly payment formula (amortized): M = P * r / (1 - (1+r)^(-n)), where r = APR/12, n = years*12.

Percentage Calculator

Date Difference Calculator

Note: Months and years are approximate for total counts; exact Y/M/D requires calendar logic.

Unit Converter