Engineering & Science
Technical calculators for electrical, mechanical, and physics problems.
Use the gear ratio calculator for driven gear teeth divided by driver gear teeth.
All Engineering & Science Calculators
easy
Ohm's Law Calculator
Calculate Voltage (V), Current (I), Resistance (R), and Power (P)
10 seconds
medium
Voltage Drop Calculator
Calculate voltage drop in wire based on distance and load
1 minute
medium
Resistor Color Code
Calculate resistance from 4-band and 5-band color codes
30 seconds
easy
Gear Ratio Calculator
Driven and driver teeth, output RPM, and torque.
30 seconds
easy
Torque Converter
Convert between Nm, lb-ft, lb-in, and kg-m
10 seconds
easy
Force Converter
Convert Newtons (N), Pounds-force (lbf), and Kilogram-force (kgf)
10 seconds
easy
Pressure Converter
Convert PSI, Bar, Pascal, and Atmosphere
10 seconds
easy
Speed of Sound Calculator
Calculate the speed of sound in air based on temperature
10 seconds
easy
Kinetic Energy Calculator
Calculate the energy of a moving object
10 seconds
easy
Power Converter
Convert Watts, Horsepower (hp), and BTUs
10 seconds
easy
Horsepower Calculator
Calculate horsepower or kilowatts from torque and RPM
1 minute