Solve complex sums in milliseconds
Free, accurate, in-browser calculators across finance, health, academics, and math. No accounts, no paywalls, instant outputs.
Paycheck Calculator
Estimate your take-home pay or net income after federal, state, and local tax withholdings. Toggle hourly vs salary rates.
Mortgage Calculator
Calculate your monthly mortgage payment including principal, interest, taxes, and insurance (PITI). Includes amortization schedule.
Tip Calculator
Quickly calculate the gratuity for a restaurant bill and easily split the total cost among multiple people.
GPA Calculator
Calculate your high school or college grade point average (GPA). Supports weighted grades (AP/IB/Honors) and cumulative semesters.
Grade Calculator
Calculate your current class grade based on weighted categories (exams, quizzes, homework, participation).
BMI Calculator
Calculate your Body Mass Index (BMI) using metric or imperial units and learn your weight status category.
Calorie Calculator (TDEE)
Find your Total Daily Energy Expenditure (TDEE) and calculate calories needed for weight loss, maintenance, or gain.
Age Calculator
Determine your exact age in years, months, weeks, days, hours, and minutes from your birthdate.
Percentage Calculator
Solve percentage problems, including percentage of a value, percentage increase/decrease, and proportion calculations.
Discount / Sale Price Calculator
Calculate the final sale price, total savings, and original price of discounted items during shopping.
Auto Loan Calculator
Calculate monthly car payments, interest costs, and amortization schedules for new or used auto loans.
Personal Loan Calculator
Find your monthly personal loan payments and see a full interest payoff schedule.
Sales Tax Calculator
Calculate sales tax added to a purchase or reverse-calculate the sales tax to find the pre-tax item price.
Compound Interest Calculator
See how your savings grow over time with compound interest. Supports monthly/annual deposits and compounding frequencies.
401(k) / Retirement Savings Calculator
Project your future 401(k) retirement balance based on annual salary, employer matching, and growth rates.
Debt Payoff Calculator
Plan your debt-free timeline using the popular snowball or avalanche debt payoff strategies.
Credit Card Interest Calculator
Find out how long it will take to pay off your credit card balance and how much interest you will accrue.
Weight Loss Goal Calculator
Find the daily calorie deficit required to reach your target weight by a specific date.
Pregnancy Due Date Calculator
Calculate your estimated due date, conception date, and current gestational week/milestones.
Body Fat Percentage Calculator
Estimate your body fat percentage using the US Navy body circumference method.
Water Intake Calculator
Calculate how much water you should drink daily based on your body weight and exercise activity.
Final Exam Grade Calculator
Find out what grade you need on your final exam to achieve a target overall grade in your class.
Grade Curve Calculator
Curve test grades and exam scores using common curving methods (Flat Scale, Linear, Root, or Bell Curve).
Date Difference Calculator
Calculate the total number of days, weeks, months, or years between two dates.
Unit Conversion Calculator
Convert between imperial and metric units for length, weight, area, volume, and temperature.
Time Zone Calculator
Convert times between different global time zones and plan virtual meetings easily.