Calculate Anything.

Percentage Calculator

Calculate percentages, percentage change, and what percent one number is of another. Essential for grades, discounts, tips, and everyday math.

GPA Calculator

Calculate your GPA for the semester or cumulative across your entire academic career. Supports both 4.0 and weighted grading scales.

Scientific Calculator

A full-featured scientific calculator for trigonometry, logarithms, exponents, and complex math expressions — right in your browser.

Loan Calculator

Calculate monthly loan payments, total interest paid, and see a full amortization schedule for any fixed-rate loan.

Debt-to-Income Ratio

Calculate your debt-to-income (DTI) ratio to see how lenders evaluate your borrowing capacity and whether you qualify for a loan.

Credit Card Payoff

Find out how long it will take to pay off your credit card and how much interest you will pay under different monthly payment scenarios.

Mortgage Payment

Calculate your monthly mortgage payment including principal, interest, taxes, and insurance (PITI). See a full amortization breakdown.

Amortization Schedule

Generate a month-by-month amortization schedule showing exactly how much of each payment goes to principal vs. interest over the life of your loan.

House Affordability

Estimate how much house you can afford based on your income, debt, down payment, and current interest rates using standard lending guidelines.

Compound Interest

Calculate the power of compounding returns on any investment or savings account. See how money grows over time with regular contributions.

ROI Calculator

Calculate return on investment (ROI) as a percentage to evaluate the profitability of any investment, project, or business decision.

Retirement Calculator

Project how much you need to retire and whether you are on track. Model different savings rates, retirement ages, and expected returns.

BMI Calculator

Calculate your Body Mass Index (BMI) using height and weight in metric or imperial units, with a clear breakdown of BMI categories.

Calorie Calculator

Calculate your daily calorie needs based on age, gender, height, weight, and activity level using the Mifflin-St Jeor equation.

Pregnancy Due Date

Calculate your estimated due date and pregnancy milestones from your last menstrual period or conception date.

Income Tax Calculator

Estimate your federal income tax liability based on your filing status, income, and deductions using the current IRS tax brackets.

Salary Converter

Convert any salary between hourly, daily, weekly, bi-weekly, monthly, and annual rates to understand and compare job offers.

Take-Home Pay

Calculate your net take-home pay after federal taxes, Social Security, Medicare, and state income tax withholding.