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. ...
Determine the required sample size for a given margin of ...
Convert salt between table salt, kosher salt, and sea salt ...
Calculate running pace, finish time, or distance from the ...
Calculate engine RPM from vehicle speed, gear ratio, and ...
Round numbers to decimal places, whole numbers, or ...
Calculate room area, volume, and perimeter from dimensions. ...
Estimate BTU capacity needed to heat or cool a room. Use ...
Calculate roofing squares and bundles of shingles needed. ...
Calculate roof pitch, angle, and slope multiplier from rise ...
Calculate relative risk (risk ratio) from a 2×2 contingency ...
Calculate relative humidity, actual vapor pressure, or dew ...
Estimate CO2 and energy savings from recycling common ...
Scale any recipe up or down by entering original and ...
Multiply a recipe by a fixed factor (e.g. double, triple). ...
Divide a recipe into a smaller batch. Use this free ...
Calculate the weight of rebar by bar size and length. Use ...
Calculate linear feet of rebar needed for a concrete slab. ...
Calculate reading speed (WPM) and estimate time to read a ...
Calculate multiple readability scores for any text (Flesch, ...
Simplify ratios and compare proportional values. Use this ...
Randomly divide a list of names into equal-sized teams. Use ...
Pick one or more random items from a list you provide. Use ...
Generate a random number within a selected range. Use this ...
Calculate ramp length, slope ratio, and ADA compliance for ...
XTRAW Tools
Free calculators, converters, generators, and simple apps for everyday decisions.
XTRAW Tools
Free calculators, converters, generators, and simple apps for everyday decisions.