Calculators
Browse our collection of free online calculators
Finance
Financial calculators for loans, investments, and money management
Mathematics
Mathematical calculators for algebra, calculus, and number operations
Compatibility
Fun and self-reflection tools based on dates and simple patterns.
calculators/ui.sections.tags
calculators/ui.sections.tagsHint
Popular Calculators
Percentage of a Number
Calculate what a certain percentage of a number is. Useful for discounts, tips, taxes, and other percentage-based calculations.
How to: Enter the number you want to calculate a percentage of
Loan Payment Calculator
Calculate your loan payment, total interest, and repayment cost. Estimate monthly payments for personal loans, auto loans, and mortgages.
How to: Enter the loan amount - the total amount you are borrowing (principal)
Add Percentage to Number
Increase a number by a certain percentage. Useful for calculating price increases, salary raises, and growth rates.
How to: Enter the base number you want to increase
Subtract Percentage from Number
Decrease a number by a certain percentage. Useful for calculating discounts, price reductions, and decreases.
How to: Enter the base number you want to decrease
Compound Interest Calculator
Calculate how your investment grows over time with compound interest. See the final amount, total contributions, and interest earned.
How to: Define your initial investment amount - the starting balance you invest today
New Calculators
Zodiac Compatibility Checker
Enter two birth dates to reveal their zodiac signs, compatibility score, and a short interpretation.
How to: Enter two birth dates (any year works).
Work & Team Compatibility Calculator
Enter two birth dates to see collaboration, communication, and planning scores plus tailored teamwork tips.
How to: Enter both birth dates. Year does not need to match.
Take-Home Pay Calculator
Estimate your net income after taxes and deductions. Calculate take-home pay from gross salary using effective tax rates.
How to: Enter your gross income - your total income before taxes and deductions
Subtract Percentage from Number
Decrease a number by a certain percentage. Useful for calculating discounts, price reductions, and decreases.
How to: Enter the base number you want to decrease
Savings Calculator
Plan your savings and see how regular deposits grow over time. Calculate savings growth with compound interest.
How to: Enter your initial savings - the amount you already have saved (can be $0)
Recommended for You
Love Compatibility by Birth Date
Blend two names and birthdays to get a playful compatibility score with a quick insight.
How to: Enter both names exactly how you prefer to be called
Zodiac Compatibility Checker
Enter two birth dates to reveal their zodiac signs, compatibility score, and a short interpretation.
How to: Enter two birth dates (any year works).
Numerology Compatibility (Life Path Numbers)
Turn two birth dates into life path numbers, compare the pairing, and read a friendly interpretation.
How to: Enter any two birth dates (past or present).
Friendship Compatibility Calculator
Enter two birth dates to see a playful friendship score plus communication, trust, and energy highlights.
How to: Enter each friend’s birth date (no need for year alignment).
Work & Team Compatibility Calculator
Enter two birth dates to see collaboration, communication, and planning scores plus tailored teamwork tips.
How to: Enter both birth dates. Year does not need to match.
Finance
Loan Payment Calculator
Calculate your loan payment, total interest, and repayment cost. Estimate monthly payments for personal loans, auto loans, and mortgages.
How to: Enter the loan amount - the total amount you are borrowing (principal)
Compound Interest Calculator
Calculate how your investment grows over time with compound interest. See the final amount, total contributions, and interest earned.
How to: Define your initial investment amount - the starting balance you invest today
Auto Loan Calculator
Estimate your car loan payment, interest cost, and total vehicle price. Calculate monthly payments with down payment, trade-in, taxes, and fees.
How to: Enter the vehicle price - the total cost of the car you want to purchase
Investment Calculator
Estimate how your investments grow over time with compound returns. Calculate profit, total contributions, and long-term value.
How to: Enter your initial investment - the starting amount you invest today (can be $0)
Loan Overpayment Calculator
See how much interest you overpay on a loan and how to reduce it. Calculate total interest cost and savings from extra payments.
How to: Enter the loan amount - the total amount you borrowed
Mortgage Calculator
Estimate your monthly mortgage payment, total interest, and full home ownership cost. Includes taxes, insurance, HOA, and extra payment impact.
How to: Enter the home price - the total purchase price of the home you want to buy
Personal Loan Calculator
Calculate personal loan payments, interest, fees, and total repayment cost. Estimate monthly payments and overpayment.
How to: Enter the loan amount - the total amount you want to borrow
ROI Calculator
Calculate return on investment and evaluate profitability. Measure net profit, return percentage, and performance.
How to: Enter the investment cost - the total amount you invested (must be greater than 0)
Loan Comparison Calculator
Compare loan offers side-by-side. See monthly payment, total interest, fees, and total cost to choose the best loan.
How to: Select comparison metric - choose whether to find the loan with lowest monthly payment, lowest total interest, or lowest total cost
Mortgage Comparison Calculator
Compare mortgage offers side-by-side. See monthly payments, total interest, taxes, insurance, and total cost to choose the best mortgage.
How to: Select comparison metric - choose whether to find the mortgage with lowest total monthly payment, lowest total interest, lowest total cost, or fastest payoff
Savings Calculator
Plan your savings and see how regular deposits grow over time. Calculate savings growth with compound interest.
How to: Enter your initial savings - the amount you already have saved (can be $0)
Retirement Calculator
Plan your retirement savings and income. Estimate how much you will have and how much you need to retire comfortably.
How to: Select calculation mode - choose "How much will I have?" to project your future balance, or "How much do I need?" to determine required savings
Investment vs Savings Calculator
Compare saving and investing to see which grows your money faster. Calculate final balance, earnings, and inflation-adjusted value.
How to: Enter your initial amount - the money you start with
Take-Home Pay Calculator
Estimate your net income after taxes and deductions. Calculate take-home pay from gross salary using effective tax rates.
How to: Enter your gross income - your total income before taxes and deductions
Emergency Fund Calculator
Find out how much emergency savings you need for financial security. Calculate your emergency fund target and time to reach your goal.
How to: Enter your monthly expenses - include all essential expenses (housing, food, utilities, transportation, insurance, minimum debt payments)
Net Worth Calculator
Calculate your net worth by subtracting liabilities from assets. Understand your financial health and track progress over time.
How to: Gather information about your assets - cash, savings, investments, retirement accounts, real estate, vehicles, and other valuable items
Mathematics
Percentage of a Number
Calculate what a certain percentage of a number is. Useful for discounts, tips, taxes, and other percentage-based calculations.
How to: Enter the number you want to calculate a percentage of
Add Percentage to Number
Increase a number by a certain percentage. Useful for calculating price increases, salary raises, and growth rates.
How to: Enter the base number you want to increase
Subtract Percentage from Number
Decrease a number by a certain percentage. Useful for calculating discounts, price reductions, and decreases.
How to: Enter the base number you want to decrease
Compatibility
Love Compatibility by Birth Date
Blend two names and birthdays to get a playful compatibility score with a quick insight.
How to: Enter both names exactly how you prefer to be called
Zodiac Compatibility Checker
Enter two birth dates to reveal their zodiac signs, compatibility score, and a short interpretation.
How to: Enter two birth dates (any year works).
Numerology Compatibility (Life Path Numbers)
Turn two birth dates into life path numbers, compare the pairing, and read a friendly interpretation.
How to: Enter any two birth dates (past or present).
Friendship Compatibility Calculator
Enter two birth dates to see a playful friendship score plus communication, trust, and energy highlights.
How to: Enter each friend’s birth date (no need for year alignment).
Work & Team Compatibility Calculator
Enter two birth dates to see collaboration, communication, and planning scores plus tailored teamwork tips.
How to: Enter both birth dates. Year does not need to match.
Birth Date Compatibility Calculator
Compare two birth dates to get a playful compatibility score with communication, emotional, and lifestyle breakdowns.
How to: Enter two birth dates (any calendar year works).