All tools
150 tools available
Mortgage Calculator
Estimate your monthly mortgage payment from home price, down payment, rate and term.
Refinance Calculator
Compare your current mortgage payment to a new refinanced rate and term.
Playback Speed Calculator
See how long a video or podcast takes at 1.25×, 1.5×, 2×… and how much time you save.
Slope Calculator
Find the slope, angle and equation of the line through two points.
Binary Calculator
Add, subtract, multiply or divide two binary numbers.
Temperature Converter
Convert between Celsius, Fahrenheit and Kelvin.
Percentage Increase Decrease Calculator
Find the percentage increase or decrease between two values.
Loan Payoff Calculator
See how much faster you pay off a loan with extra monthly payments.
Love Calculator
A fun, just-for-entertainment compatibility percentage between two names.
Random Number Generator
Generate random numbers in any range, with or without repeats.
HTML to JSX Converter
Convert HTML markup into React-ready JSX — class→className, style objects, self-closing tags.
BAC Calculator
Estimate blood alcohol content using the Widmark formula.
Calculator
A clean, general-purpose calculator for everyday arithmetic.
Distance Formula Calculator
Find the distance between two points on a coordinate plane.
Random Emoji Generator
Roll random emojis — single, sets, or emoji stories. Click to copy.