Fast & free calculators

Percentage

Percentage calculators: determine the percentage of a number, apply a reduction, an increase, or calculate the rate of change.

Square Root

Square root calculator: calculate the square root of any positive number, or find the square of a number.

Volume

Volume calculator supporting different 3D shapes with automatic unit conversion and precise mathematical formulas.

Word Counter

Free online tool to count words, characters with spaces, and characters without spaces in your text.

BMI

BMI calculator to calculate your Body Mass Index and understand what it means for your health.

Compound Interest

Calculate compound interest and see how your investments grow over time with regular contributions.

Cubic Feet

Cubic feet calculator to calculate the volume of an object or a space in ft³, in³ or yd³.

Exponent

Exponent calculator: calculate the value of any base raised to any power, including negative exponents.

Hourly to Salary

Convert hourly pay to annual salary and vice versa. Calculate daily, weekly, and monthly salaries based on your work schedule.

Your Life in Weeks

Visualize your life in weeks and see how many weeks you have lived and how many remain. A powerful perspective on life and time.

mg to mL

Convert milligrams to milliliters and vice versa with our easy-to-use calculator. Perfect for liquid measurements and density calculations.

Number of Days

Calculate the number of days between two dates or until a specific date. Useful for planning events, tracking deadlines, and project management.

Pace & Speed

Convert between pace (minutes per mile) and speed (mph) for running and fitness activities.

Random Number Generator

Generate one or more random numbers with a customizable range, optional exclusions, and the ability to ensure unique values.

Square Footage

Square footage calculator to calculate the area of a surface in ft².

Area

Free online tool to calculate the surface area of solids like spheres, cubes, cylinders, cones, pyramids, and prisms with unit conversions.

SWP (Systematic Withdrawal Plan)

Calculate your investment sustainability with a Systematic Withdrawal Plan. Plan your retirement income and understand how long your money will last.

Sales Tax (VAT)

VAT calculator: calculate sales tax amount, prices excluding tax, and prices including tax with different tax rates.

VO2 Max

Calculate your estimated VO2 max using age and resting heart rate. Get insights into your cardiovascular fitness level and heart rate metrics.