PDFAITools
Tool Guides & How-Tos
Step-by-step guides for every tool — learn what it does, how to use it, tips, and FAQ. 441 guides available.
Gas Mileage Calculator
Calculate MPG and L/100km from odometer readings or direct distance and fuel amo...
Wind Chill Calculator
Calculate wind chill temperature using the NWS formula and see frostbite risk le...
Heat Index Calculator
Calculate the heat index (feels-like temperature) from temperature and humidity.
BTU Calculator
Calculate BTU needed to heat or cool a room, or convert BTU to kWh, joules and c...
Voltage Drop Calculator
Calculate voltage drop in electrical wire runs for any gauge, length and current...
Resistor Calculator
Decode resistor colour bands (4 or 5 band) and calculate series/parallel resista...
Ohm's Law Calculator
Calculate voltage, current, resistance and power using Ohm's Law. Solve for any...
Horsepower Calculator
Calculate engine horsepower from torque and RPM, or convert HP to kW, PS and mor...
Density Calculator
Calculate density, mass or volume using D = M/V. Includes a common materials ref...
Bandwidth Calculator
Calculate download time, required bandwidth speed or monthly data cap usage.
Concrete Calculator
Calculate how many bags of concrete you need for slabs, columns, steps or tube f...
Square Footage Calculator
Calculate square footage for multiple rooms with different shapes and get a cost...
Tile Calculator
Calculate how many tiles you need for any room including waste percentage and co...
Roofing Calculator
Calculate roof area, shingle squares and bundles needed from footprint and pitch...
Mulch Calculator
Calculate cubic yards or bags of mulch needed for any garden bed area and depth.
Gravel Calculator
Calculate volume and weight of gravel, sand or topsoil needed for any area and d...