Calculator Category

Engineering Calculators

Calculators for electrical, mechanical, and civil engineering work — size a wire, decode a resistor, check a beam, or estimate concrete. Built for engineers, electricians, students, and DIY builders who need the formula applied correctly the first time.

Common uses

  • Apply Ohm's Law and size wire gauge for a safe circuit
  • Decode resistor color bands or tune an LC resonant circuit
  • Check beam deflection, stress, and strain under load
  • Estimate concrete volume and pipe flow for a job

Calculators

Ohm's Law Calculator

Solve for voltage, current, resistance or power.

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Power Calculator

Calculate electrical power, energy consumption, and cost for AC and DC circuits. Supports single and three-phase systems.

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Wire Gauge Calculator

Determine the correct wire size (AWG) based on current, length, and voltage drop, with NEC ampacity and voltage-drop checks.

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Resistor Color Code Calculator

Decode resistor color bands or find colors for a given resistance value. Supports 4, 5, and 6-band resistors.

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Stress & Strain Calculator

Calculate mechanical stress, strain, and Young's modulus for engineering materials. Includes safety factor analysis.

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Beam Deflection & Bending Moment Calculator

Calculate beam deflection, bending moment, and reaction forces for various beam types and load configurations. Structural engineering tool.

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Concrete Volume / Material Estimator

Calculate the concrete to order and the bags it takes, plus the cement, sand, aggregate and water for a mix you batch yourself. Supports standard and custom mix ratios.

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Pipe Flow / Pressure Drop Calculator

Calculate pressure drop, flow rate, and fluid velocity in pipes. Supports Darcy-Weisbach and Hazen-Williams methods with minor losses.

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LC Resonant Circuit Calculator

Calculate resonant frequency, inductance, capacitance, and impedance for LC and RLC circuits. Includes Q factor and bandwidth calculations.

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