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. ...
Calculate [H⁺] concentration from pH. Use this free ...
Calculate required HVAC tonnage for a home or commercial ...
Estimate humidifier output (gallons/day) needed for a home. ...
Convert human years to dog years using the logarithmic age ...
Convert human age to cat years. Use this free browser-based ...
Encode text to HTML entities or decode HTML entities back ...
Estimate gross and net profit for a house flip. Use this ...
Convert hours to minutes. Use this free browser-based hours ...
Calculate the number of usable hosts in a subnet from a ...
Convert horsepower and RPM to engine torque. Use this free ...
Solve for spring constant, force, or displacement using ...
Calculate home equity loan payments. Use this free ...
Calculate total annual home CO2 emissions from electricity, ...
Calculate high school GPA from letter grades with optional ...
Convert hexadecimal values to decimal numbers. Use this ...
Calculate buffer pH using the Henderson-Hasselbalch ...
Convert hectares to acres. Use this free browser-based ...
Estimate BTU/hr needed to heat a space based on area and ...
Estimate heat loss through walls, ceiling, and windows. Use ...
Calculate the apparent "feels like" temperature from air ...
Estimate heart rate training zones from age and resting ...
Calculate genotype frequencies at Hardy-Weinberg ...
Calculate half-life from decay constant, or find decay ...
Calculate gutter length and number of downspouts needed. ...
XTRAW Tools
Free calculators, converters, generators, and simple apps for everyday decisions.
XTRAW Tools
Free calculators, converters, generators, and simple apps for everyday decisions.