Engineering Calculators
Professional-grade calculators for engineers. Convert units, calculate material properties, and solve technical problems with precision.
All Engineering Calculators
Showing 24 of 44 calculators
Stair Calculator
Calculate stair dimensions including rise, run, number of steps, stringer length, and angle. Desi...
Wire Size Calculator
Calculate the correct wire size for your electrical installation. Find AWG or metric wire gauge b...
Voltage Drop Calculator
Calculate voltage drop in electrical wiring for single-phase and three-phase circuits. Determine ...
Velocity Calculator
Calculate velocity, speed, distance, or time using v = d/t. Solve all four kinematic equations wi...
Torque Calculator
Calculate torque from force and lever arm distance, convert between torque units, and calculate p...
Tolerance Calculator
Use our free engineering tolerance calculator to compute dimensional limits, tolerance width, and...
Tile Calculator
Calculate exactly how many tiles you need for any floor, wall, bathroom or backsplash project. En...
Paint Calculator
Calculate exactly how much paint you need for any interior or exterior project. Enter room dimens...
Power Factor Calculator
Calculate power factor, real power (kW), reactive power (kVAR), apparent power (kVA), and capacit...
Electricity Cost Calculator
Calculate electricity costs for any appliance based on wattage, usage hours, and your electricity...
EV Charging Calculator
Calculate EV charging time, cost, and energy usage for any electric vehicle. Compare Level 1, Lev...
Fence Calculator
Calculate posts, panels, gates, concrete and total cost for any residential or commercial fence p...
Force Calculator
Calculate force using Newton's second law (F=ma), net force from multiple forces, weight, frictio...
Frequency and Wavelength Calculator
Convert between frequency, wavelength, wave speed and period for any wave type. Supports light, s...
Fuel Consumption Calculator
Calculate your vehicle's fuel consumption, trip cost, and CO2 emissions. Supports both metric (L/...
Gear Ratio Calculator
Calculate gear ratios, output speed, and torque multiplication for gear trains, sprockets, pulley...
Heat Transfer Calculator
Calculate heat transfer through materials using conduction, convection, and radiation formulas. D...
HVAC Load Calculator
Calculate HVAC heating and cooling load requirements using Manual J simplified methodology. Deter...
Kinetic Energy Calculator
Calculate kinetic energy (KE = ½mv²) for any object given its mass and velocity, or solve the e...
Material Strength Calculator
Calculate normal stress (σ = F/A), shear stress (τ = V/A), bending stress (σ = Mc/I), strain (...
Mulch Calculator
Calculate exactly how much mulch you need for any garden bed, tree ring, flower border or playgro...
Ohm's Law Calculator
Free Ohm's Law calculator. Solve for voltage (V), current (I), resistance (R), or power (P) using...
Air Flow Calculator (CFM)
Calculate air flow rate (CFM), duct velocity, and duct sizing for HVAC systems. Determine ventila...
Pipe Flow Calculator
Calculate fluid flow rate, velocity, pressure drop, and Reynolds number for pipes. Determine if f...