Free Online Calculators

Calculate your exact age in years, months, and days from your date of birth.

Calculate how many units you need to sell to cover your fixed and variable costs.

Estimate how your investments may grow over time with compound interest and regular contributions.

Generate CSS clamp() values for fluid typography and spacing between two viewport widths.

Calculate the sale price and savings from any discount percentage or fixed amount off.

Calculate your GPA from course grades and credit hours. Supports both letter grades and percentage inputs.

Estimate how much house you can afford based on income, debts, down payment, and current interest rates.

Estimate your monthly mortgage payment, total interest, and total cost based on loan amount, interest rate, and term.

Calculate percentages: find X% of Y, what percent X is of Y, percentage increase/decrease, and more.

Calculate percentage change, percentage of a number, and what percent one number is of another.

Estimate your after-tax take-home pay based on gross salary, tax rates, and pre-tax deductions.

Calculate the tip amount and total bill with quick preset buttons for 15%, 18%, 20%, and 25%.

Parse tire size codes, calculate dimensions, and compare two tire sizes for diameter and speedometer differences.