Free Online Calculators

BMI Calculator

Calculate your Body Mass Index (BMI) to check if your weight is healthy for your height.

Height (cm)

Weight (kg)

Enter height and weight, then calculate.

Calculate your monthly loan payment, total interest paid, and see the full amortization breakdown.

Loan amount

Annual interest rate (%)

Term (months)

Enter loan details, then calculate.

Calculate the tip amount and split the bill between multiple people.

Bill amount

Tip (%)

People

Enter bill and tip percent, then calculate.

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

Date of birth

Choose a birth date, then calculate.

Calculate percentages quickly: what is X% of Y, percentage increase/decrease, and more.

What is x% of y?

x (%)

y

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Percentage change from a to b

Original a

New b

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Convert temperatures between Celsius (°C) and Fahrenheit (°F).

Celsius °C

Fahrenheit °F

Change either value; the other updates automatically.

Linked fields — no button needed.

Convert between meters, centimeters, inches, and feet.

Value

Unit

Enter a value and unit, then convert.

Convert between kilograms and pounds.

Kilograms (kg)

Pounds (lb)

Change kg or lb; the other updates (1 kg ≈ 2.2046226218 lb).

Linked fields.