Engineering Calculators
Electrical, mechanical, and HVAC calculations.
32 calculators available
Electrical
Ohms Law Calculator
Calculate voltage, current, or resistance.
Voltage Drop Calculator
Calculate voltage drop in electrical wiring.
Resistor Calculator
Calculate series and parallel resistance.
Power Calculator
Calculate electrical power, voltage, and current.
Capacitance Calculator
Calculate charge and energy stored in capacitors.
Resistor Color Code Calculator
Decode resistor color bands to resistance value and tolerance.
LED Resistor Calculator
Calculate the series resistor needed for an LED circuit.
Voltage Divider Calculator
Calculate output voltage in a voltage divider circuit.
Wire Gauge Calculator
Find wire diameter, area, resistance, and ampacity by AWG number.
Physics
Acceleration Calculator
Calculate acceleration from force/mass or velocity change and time.
Force Calculator
Calculate force using F=ma (Newtons second law).
Kinetic Energy Calculator
Calculate the kinetic energy of a moving object.
Momentum Calculator
Calculate momentum and kinetic energy from mass and velocity.
Velocity Calculator
Calculate speed, distance, or time.
Wavelength Calculator
Calculate wavelength from frequency and wave speed.
Pendulum Calculator
Calculate period and frequency of a simple pendulum.
HVAC
Mechanical
Horsepower Calculator
Calculate horsepower from force and velocity.
Engine Horsepower Calculator
Calculate HP from torque and RPM.
Torque Calculator
Calculate torque from forcexdistance or power/RPM.
Pulley Calculator
Calculate mechanical advantage and effort force in pulley systems.
Spring Constant Calculator
Calculate spring constant, force, or displacement using Hooke
Stress & Strain Calculator
Calculate stress, strain, and Young
Chemistry
pH Calculator
Calculate pH from hydrogen ion concentration.
Molarity Calculator
Calculate molar concentration of solutions.
Dilution Calculator
Calculate dilution ratios using C1V1=C2V2.
Molecular Weight Calculator
Calculate molecular weight of common chemical compounds.
Stoichiometry Calculator
Convert between grams, moles, and number of particles.
Networking
Weather
About Engineering Calculators
Electrical, mechanical, and HVAC calculations. CALTRX provides 32 free engineering calculators with step-by-step explanations, formulas, real-world examples, and expert tips. Every calculator is designed for clarity and accuracy, helping you understand not just the answer but the reasoning behind it.