Free Online Calculators — 365 Calc

Calculate your monthly mortgage payments, total interest, and amortization schedule.

Calculate Equated Monthly Installments for any type of loan.

See how your money grows with compound interest over time.

Quickly calculate simple interest on any principal amount.

Estimate the future value and returns on your investments.

Plan your retirement by calculating how much you need to save.

Find out how long it will take to pay off your credit card debt.

Calculate how much you need to save monthly to reach your goal.

Determine your debt-to-income ratio for better financial health.

Calculate your total net worth by summing assets and subtracting liabilities.

Calculate your loan amortization schedule with monthly payments and extra payments.

Calculate your Body Mass Index to assess your weight category.

Determine your daily calorie needs based on your activity level.

Estimate your body fat percentage using body measurements.

Find your ideal body weight based on height and frame size.

Calculate your Basal Metabolic Rate — calories burned at rest.

Find out how much water you should drink daily.

Estimate your baby's due date based on your last menstrual period.

Calculate your target heart rate zones for optimal training.

Calculate percentages, percentage change, and percentage of numbers.

Add, subtract, multiply, and divide fractions with ease.

A full-featured scientific calculator for advanced calculations.

Find the Greatest Common Divisor and Least Common Multiple.

Compute standard deviation and variance for any data set.

Solve quadratic equations and find roots instantly.

Calculate the area of various geometric shapes.

Calculate the volume of 3D shapes like spheres, cubes, and cylinders.

A universal unit converter for length, weight, volume, and more.

Convert between Celsius, Fahrenheit, and Kelvin instantly.

Convert between meters, feet, inches, miles, and more.

Convert between kilograms, pounds, ounces, and more.

Convert between km/h, mph, m/s, and knots.

Convert between world currencies with approximate exchange rates.

Convert times between different time zones worldwide.

Convert between bytes, KB, MB, GB, TB, and more.

Calculate gross, operating, and net profit margins.

Determine your break-even point in units and revenue.

Calculate Return on Investment for any project or investment.

Calculate the markup percentage and selling price.

Calculate the discounted price and savings amount.

Calculate sales tax and total price with tax included.

Calculate tips and split bills among multiple people.

Calculate invoice totals with tax, discounts, and multiple items.

Calculate your exact age in years, months, and days.

Find the number of days, weeks, and months between two dates.

Calculate your Grade Point Average from your course grades.

Calculate your final grade based on weighted assignments.

Estimate fuel costs for any trip based on distance and fuel efficiency.

Calculate your electricity bill based on appliance usage.

Estimate how much paint you need for your room or project.

Calculate the number of tiles needed for your flooring or wall project.