Math

Text to Speech

Turn text into natural-sounding voiceovers in seconds. Choose from multiple voices and adjust the speaking rate for videos, audiobooks, announcements, and more.

Coefficient of Variation Calculator

Calculate the coefficient of variation (CV) from your dataset to easily assess relative dispersion and data volatility. Free online statistics calculator.

Complex Number Calculator

Free online complex number calculator. Add, subtract, multiply, and divide two complex numbers instantly. Perfect for circuit analysis and signal processing.

Root Mean Square (RMS) Calculator

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

Fraction Simplifier

Free online fraction simplifier. Enter the numerator and denominator to instantly reduce fractions to their simplest form and see the step-by-step GCD calculation process.

Speed of Sound Calculator

Quickly calculate the speed of sound propagation in air based on temperature, humidity, and air pressure; supports real-time conversion.

Credit Card Installment Calculator

Calculate your payment per installment, fees, and total repayment for a credit card installment plan

Subtraction Chart Generator (Up to 10)

Quickly generate a subtraction chart up to 10. Supports printing and PDF downloads.

Curtain Fabric Calculator

Input window width, pleat multiplier, and fabric width to quickly calculate how many meters of fabric a single curtain needs—avoid buying excess or falling short.

Difference of Squares Calculator

Enter two values, a and b, to automatically calculate the difference of squares (a+b)(a-b) and simplify your algebraic calculations.

Online M3U8 Player

Paste an M3U8 link and play HLS video streams instantly. No plugins needed—ideal for testing live streams and previewing video segments.

Point to Line Distance Calculator

Free online point to line distance calculator. Quickly calculate the perpendicular distance from a point to a line using two-point or general equation (Ax+By+C=0) forms.

Sliding Friction Calculator

Quickly calculate sliding friction by entering the coefficient of friction and normal force. A free online kinetic friction calculator for physics and engineering.

Projector Throw Distance Calculator & Screen Size Guide

Estimate projector installation distance using screen, display panel, and lens specifications

Nonsense English Article Generator

Quickly generate English articles that look well-structured but are completely nonsensical. Ideal for placeholder text in web design, presentations, and other layout scenarios.

Normal Distribution Calculator

Input mean and standard deviation to quickly calculate the cumulative probability or quantile corresponding to a value.

Excel to Phone Contacts Converter | Excel to vCard Tool

Convert an Excel contact list into a vCard file you can import into your phone.

Quadratic Equation Calculator

Enter coefficients a, b, and c to instantly calculate the real or complex roots of a quadratic equation.

Escape Velocity Calculator

Calculate the minimum escape velocity from any celestial body's surface, with support for custom celestial parameters.

Mass Flow Rate Calculator

Free online mass flow rate calculator. Enter density and volumetric flow rate to quickly calculate mass flow rate with automatic unit conversions.