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 reading speed (WPM) and estimate time to read a ...
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 ...
Calculate relative humidity, actual vapor pressure, or dew ...
Calculate relative risk (risk ratio) from a 2×2 contingency ...
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. ...
Round numbers to decimal places, whole numbers, or ...
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 ...
Perform advanced arithmetic, powers, roots, logarithms, ...
Convert numbers to and from scientific notation. Use this ...
Calculate the SHA-256 hash of any text using the browser ...
Calculate daily, monthly, and annual water use from ...
Calculate squares of siding needed to cover exterior walls. ...
Reduce fractions to simplest form. Use this free ...
XTRAW Tools
Free calculators, converters, generators, and simple apps for everyday decisions.
XTRAW Tools
Free calculators, converters, generators, and simple apps for everyday decisions.