Free Online Calculators & Tools

Calculate monthly payments, total interest, and total cost for any loan. Compare different loan terms easily.

Estimate your monthly mortgage payments. Includes principal, interest, taxes, and insurance (PITI).

Plan your retirement savings. Estimate how much you need to save with compound interest projections and the 4% rule.

Project your investment growth over time with compound interest. Adjust contributions, rate, and time horizon.

Convert between hourly, weekly, monthly, and annual salary. Perfect for job offers and budgeting.

Calculate your Body Mass Index and learn what it means for your health. Includes BMI categories and weight status.

Calculate your daily calorie needs based on age, gender, weight, height, and activity level. Includes BMR and TDEE.

Convert between 15 major world currencies with live exchange rates. Supports USD, EUR, GBP, CNY, JPY, and more.

Calculate monthly car payments, total interest, and total cost. Compare terms from 36 to 84 months.

Find out how long to pay off credit card debt and how much interest you'll pay. Plan your debt payoff strategy.

Full amortization schedule for loans and mortgages. See monthly principal vs interest breakdown.

Estimate your body fat percentage using the US Navy method. Measure waist, neck, and hip circumference.

Calculate your exact age in years, months, days, hours, and minutes. Includes zodiac sign and birthday countdown.

Calculate the difference between two dates, or add/subtract days from any date. Great for planning and counting days.

Calculate percentages, percent change, and tips. Fast and easy percentage calculator for everyday math.