7 free browser-based calculators for everyday math problems.
Calculate percentages: X% of Y, what % is X of Y, percentage change.
Calculate aspect ratios and scale dimensions proportionally.
Calculate Body Mass Index from height and weight (metric and imperial).
Calculate exact age in years, months, and days from any birthdate.
Calculate GPA from course grades and credit hours.
Convert scores to letter grades and calculate weighted averages.
Calculate tip amount and split the bill between multiple people.