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 linear feet of rebar needed for a concrete slab. ...
Calculate the weight of rebar by bar size and length. Use ...
Divide a recipe into a smaller batch. Use this free ...
Multiply a recipe by a fixed factor (e.g. double, triple). ...
Scale any recipe up or down by entering original and ...
Estimate CO2 and energy savings from recycling common ...
Estimate total renovation costs by room and scope. Use this ...
Calculate relative humidity, actual vapor pressure, or dew ...
Calculate relative risk (risk ratio) from a 2×2 contingency ...
Estimate monthly rent budget from income and rent ratio. ...
Estimate effective monthly and annual rental income. Use ...
Calculate total ROI on a rental property investment. Use ...
Calculate gross and net rental yield on a property. Use ...
Calculate customer retention rate for a period. Use this ...
Estimate molecular weight of a single-stranded RNA ...
Calculate roof pitch, angle, and slope multiplier from rise ...
Calculate roofing squares and bundles of shingles needed. ...
Estimate BTU capacity needed to heat or cool a room. Use ...
Calculate room area, volume, and perimeter from dimensions. ...
Calculate engine RPM from vehicle speed, gear ratio, and ...
Calculate running pace, finish time, or distance from the ...
Convert salt between table salt, kosher salt, and sea salt ...
Determine the required sample size for a given margin of ...
Calculate seller-financed mortgage payment and total ...
XTRAW Tools
Free calculators, converters, generators, and simple apps for everyday decisions.
XTRAW Tools
Free calculators, converters, generators, and simple apps for everyday decisions.