Free calculators, converters, generators, and tools.
Popular Tools | New Tools | All Categories
BUILD YOUR OWN APP
Can't decide? Enter your options and let the app pick one ...
Generate random colors and display their HEX, RGB, and HSL ...
Generate one or more random dates within a specified range. ...
Convert hectares to acres. Use this free browser-based ...
Calculate buffer pH using the Henderson-Hasselbalch ...
Convert hexadecimal values to decimal numbers. Use this ...
Calculate high school GPA from letter grades with optional ...
Calculate total annual home CO2 emissions from electricity, ...
Calculate home equity loan payments. Use this free ...
Solve for spring constant, force, or displacement using ...
Convert horsepower and RPM to engine torque. Use this free ...
Calculate the number of usable hosts in a subnet from a ...
Convert hours to minutes. Use this free browser-based hours ...
Estimate gross and net profit for a house flip. Use this ...
Encode text to HTML entities or decode HTML entities back ...
Convert human age to cat years. Use this free browser-based ...
Convert human years to dog years using the logarithmic age ...
Estimate humidifier output (gallons/day) needed for a home. ...
Calculate required HVAC tonnage for a home or commercial ...
Calculate [H⁺] concentration from pH. Use this free ...
Calculate [OH⁻] concentration from pOH or pH. Use this free ...
Solve the ideal gas law (PV = nRT) for any unknown ...
Estimate ideal body weight from height and sex using common ...
Convert image files between JPG, PNG, WEBP, and related ...
Calculate impulse from force and time, or from change in ...
Convert inches to feet and inches. Use this free ...
Convert inches to millimeters. Use this free browser-based ...
XTRAW Tools
Free calculators, converters, generators, and simple apps for everyday decisions.
XTRAW Tools
Free calculators, converters, generators, and simple apps for everyday decisions.