Math

Enter any positive integer to instantly calculate its prime factorization. Get prime number verification and detailed step-by-step results with this free online calculator.

Recognize Renminbi notes and coins, combine yuan and jiao for exact payments, and practice finding change with sample denominations.

Compare two numbers from 0 to 10 with a visual balance. Predict which is larger, watch the tilt, and choose greater than, less than, or equal to.

Calculate the recommended TV installation height based on screen size, viewing distance, and seated eye level for comfortable viewing.

Quickly calculate your estimated retirement age and remaining working years based on your birth year and gender.

Free online harmonic mean calculator. Easily calculate the harmonic mean of positive numbers for average speed, exchange rates, and financial data.

Calculate water density instantly by entering temperature and salinity. Get accurate results in kg/m³ or g/cm³.

Calculate the area of a circular segment using chord length and height, or radius and central angle. Ideal for math education and engineering design.

Enter your target partition size in GB to calculate the MB value needed for an exact whole-number display in Windows—no more 99.9 GB partitions.

Quickly calculate the Root Mean Square (RMS) of a dataset online. Perfect for signal analysis, AC effective values, and engineering calculations.

Enter your wall dimensions and tile size to quickly calculate how many wall tiles you need, including grout joints and waste allowance—so you don’t overbuy or run short.

Calculate the remainder of two numbers after division. A free online modulo calculator supporting both positive and negative integer modulo operations.

Quickly and accurately convert current units like amps and milliamps.

Quickly calculate the area of an annulus by entering the inner and outer radii. Ideal for math education and engineering drafting.

Move the clock hands and practice reading or setting a 12-hour time in five-minute steps, with playback and answer feedback.

Fast and free online scientific notation converter. Easily convert between scientific notation and standard numbers with customizable precision and significant figures.

Calculate the 3rd power (cube) of any real number online. Ideal for math learning and engineering calculations.

Enter two linear equations to instantly solve for x and y. Free online calculator with step-by-step solutions.

Estimate crushed stone volume in cubic meters and weight from dimensions and a supplied density.

Calculate the feels-like wind chill index based on air temperature and wind speed, assess frostbite risks, and get safety recommendations.