Date & time, housing, unit conversions, electronics, and everyday tools — all the calculators in this category.
Ages, durations, time zones, and day counting.
Concrete, roofing, tile, mulch, and building materials.
Unit conversions, density, mass, weight, and speed.
Voltage drop, resistors, and Ohm's law calculations.
IP subnets, password generation, and encoding tools.
GPA, grades, tips, sleep, and other daily tools.
Wind chill, heat index, and dew point.
Fuel cost, gas mileage, horsepower, and tire size.
Dice rolling and just-for-fun calculators.
