All tools
151 tools available
Fuel Cost Calculator
Estimate the fuel cost of a trip from distance, fuel economy and fuel price.
Love Calculator
A fun, just-for-entertainment compatibility percentage between two names.
Z-Score Calculator
Calculate a Z-score and its percentile from a value, mean and standard deviation.
Standard Deviation Calculator
Calculate mean, variance and standard deviation from a list of numbers.
Distance Formula Calculator
Find the distance between two points on a coordinate plane.
Car Loan Calculator
Calculate your monthly car payment from price, down payment, trade-in, rate and term.
Temperature Converter
Convert between Celsius, Fahrenheit and Kelvin.
Square Footage Calculator
Calculate total square footage from room dimensions — add multiple rooms.
BAC Calculator
Estimate blood alcohol content using the Widmark formula.
String Length Calculator
Count characters, bytes, and length with/without spaces — instantly.
HTML to JSX Converter
Convert HTML markup into React-ready JSX — class→className, style objects, self-closing tags.
Pregnancy Due Date Calculator
Estimate your due date and current week of pregnancy from your last period.
401k Calculator
Project your 401(k) balance at retirement from contributions, match and growth.
Day Counter
Count the days until (or since) any date, including a live countdown.
Mortgage Calculator
Estimate your monthly mortgage payment from home price, down payment, rate and term.