Free Online Calculators for Finance, Health, Math & More
22+ fast, accurate calculators for everyday decisions — from mortgages and paychecks to BMI and unit conversion.
Financial Calculators
Mortgage Calculator
Calculate your monthly mortgage payment, total interest, and amortization.
FinancialLoan Calculator
Estimate monthly payments and total cost for any personal loan.
FinancialCompound Interest Calculator
See how your money grows with compounding over time.
FinancialSavings Calculator
Plan how much to save monthly to reach your savings goal.
FinancialRetirement Calculator
Project your retirement nest egg based on contributions and returns.
FinancialInvestment Calculator
Forecast investment growth with regular contributions.
Salary Calculators
Hourly Wage Calculator
Convert hourly pay to weekly, monthly, and yearly income.
SalaryOvertime Calculator
Calculate overtime earnings at 1.5x or 2x your regular rate.
SalarySalary to Hourly Calculator
Convert annual salary into an equivalent hourly wage.
SalaryPaycheck Calculator
Estimate net paycheck after a flat tax percentage.
Health Calculators
BMI Calculator
Calculate Body Mass Index in metric or imperial units.
HealthCalorie Calculator
Estimate daily calorie needs using the Mifflin-St Jeor equation.
HealthWater Intake Calculator
Find out how much water you should drink each day.
HealthBody Fat Calculator
Estimate body fat percentage using the U.S. Navy method.
Math Calculators
Percentage Calculator
Calculate percentages, percent change, and percent of a number.
MathFraction Calculator
Add, subtract, multiply, and divide fractions instantly.
MathScientific Calculator
Perform advanced math: trig, logs, powers, and roots.
MathAge Calculator
Calculate exact age in years, months, and days from a birth date.