Engineering Calculators
Electrical, mechanical, and HVAC calculations.
32 calculators available
Automotive
Chemistry
Dilution Calculator
Calculate dilution ratios using C1V1=C2V2.
Molarity Calculator
Calculate molar concentration of solutions.
Molecular Weight Calculator
Calculate molecular weight of common chemical compounds.
pH Calculator
Calculate pH from hydrogen ion concentration.
Stoichiometry Calculator
Convert between grams, moles, and number of particles.
Electrical
Capacitance Calculator
Calculate charge and energy stored in capacitors.
LED Resistor Calculator
Calculate the series resistor needed for an LED circuit.
Power Calculator
Calculate electrical power, voltage, and current.
Resistor Color Code Calculator
Decode resistor color bands to resistance value and tolerance.
Voltage Divider Calculator
Calculate output voltage in a voltage divider circuit.
Wire Gauge Calculator
Find wire diameter, area, resistance, and ampacity by AWG number.
Electronics
HVAC
Mechanical
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
Torque Calculator
Calculate torque from forcexdistance or power/RPM.
Networking
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.
Ohms Law Calculator
Calculate voltage, current, or resistance.
Pendulum Calculator
Calculate period and frequency of a simple pendulum.
Velocity Calculator
Calculate speed, distance, or time.
Wavelength Calculator
Calculate wavelength from frequency and wave speed.
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.