Engineering & Electronics
207 tools · page 2 of 4
- kW to Amps Calculator Convert real power in kW to current in amps. kW to Amps Calculator gives you the result instantly from a simple input.
- Setup Slack Calculator Calculate the setup timing slack of a synchronous path: clock period + skew − data path delay − setup time. Positive slack means timing is met; the maximum clock frequency is shown too.
- Stack Plume Rise Calculator Estimates how high an emission plume rises above a stack using Holland's equation from exit velocity, diameter, wind, pressure and gas temperatures.
- Gear Ratio Speed Calculator Computes road speed in mph and km/h from engine RPM, gear ratio, final drive ratio and tire diameter.
- 555 Timer Calculator Calculate the astable frequency and duty cycle of a 555 timer circuit.
- Helical Spring Rate Calculator Calculate the spring rate (stiffness) of a helical compression spring from its wire diameter, mean coil diameter, active coils and shear modulus: k = Gd⁴ ⁄ 8D³n.
- Reflection Coefficient Calculator Calculates the reflection coefficient Γ, VSWR and return loss from the load and line characteristic impedances.
- Pipe Flow Velocity Calculator Calculate the flow velocity in a pipe from the volumetric flow rate and pipe diameter.
- Transformer kVA Sizing Calculator Sizes a transformer in kVA from voltage, current and phase, then suggests the next standard rating.
- Zener Resistor Calculator Calculate the series resistor and its power dissipation for a Zener diode regulator.
- Battery Depth of Discharge Calculator Calculate the usable battery capacity at a given depth of discharge (DoD), plus the capacity held in reserve. Important for sizing and protecting battery banks.
- Rebar Spacing Calculator Calculates how many reinforcing bars fit across a span at a given spacing and edge cover, and the resulting even spacing.
- ADC SNR Calculator Calculate the ideal signal-to-noise ratio of an ADC from its effective number of bits: SNR = 6.02·ENOB + 1.76 dB.
- Non-Inverting Amplifier Gain Calculator Calculates the voltage gain (1 + Rf/Rg) and decibel gain of a non-inverting op-amp circuit, plus the output voltage for a given input.
- Wire Gauge Ampacity Calculator (AWG) Looks up the NEC ampacity of copper wire by AWG size and insulation temperature rating.
- Flory-Huggins Interaction Calculator Estimate the Flory-Huggins interaction parameter χ from solubility parameters, molar volume, and temperature to judge polymer-solvent miscibility.
- Flywheel Energy Storage Calculator Calculates the rotational kinetic energy stored in a solid-disk flywheel from its mass, radius and rotation speed.
- Flywheel Sizing Calculator Computes the moment of inertia and mass required for a solid-disk flywheel to store a target amount of rotational energy. Uses I = 2E/ω² and mass = 2I/r².
- Hartley Oscillator Calculator Calculates the oscillation frequency of a Hartley LC oscillator from its two tank inductors and the tuning capacitor (mutual inductance ignored).
- Beam Bending Moment Calculator Calculate the maximum bending moment of a simply supported beam with a central point load: M = P·L/4.
- Solar Array Sizing Calculator Calculates the number of solar panels, total array size in kW, and daily generation needed to meet a target daily energy demand, accounting for peak sun hours and system derate.
- RC High-Pass Cutoff Calculator Calculate the −3 dB cutoff frequency of an RC high-pass filter: fc = 1 ⁄ (2πRC). Frequencies above the cutoff pass; lower ones are attenuated.
- Reactive Power Calculator Calculate reactive, real and apparent power from voltage, current and power factor.
- Critical Damping Coefficient Calculator Calculates the critical damping coefficient cc = 2√(km) along with the natural frequency of a mass-spring system.
- Crystal Load Capacitance Calculator Calculate the load capacitance an oscillator presents to a crystal: CL = (C1·C2)/(C1+C2) + stray capacitance.
- Soil Porosity Calculator Calculate soil porosity n = e ÷ (1 + e) from the void ratio e. Porosity, the fraction of soil volume that is voids, is fundamental in geotechnical engineering and hydrogeology.
- Toroid Inductance Calculator Calculate the inductance of a toroidal inductor from turns, permeability, inner and outer radii, and core height.
- Angle Between Two Lines Calculator Finds the angle between two straight lines given their slopes using tanθ = |(m1−m2)/(1+m1·m2)|.
- Inverter Sizing Calculator Calculates the recommended continuous inverter wattage, peak surge demand, and required input power for your electrical loads.
- Prismoidal Volume Calculator Computes volume between two cross-sections using the prismoidal formula V = (L/6)(A1 + 4·Am + A2) from end and middle areas.
- Solenoid Magnetic Field Calculator Computes the magnetic field inside a solenoid from B = μ0·N·I/L given turns, length and current.
- CNC Spindle Speed Calculator Calculate metric CNC spindle speed (RPM) from cutting speed and tool diameter, plus the table feed rate from feed per tooth and number of teeth.
- Lift Equation Calculator Compute aerodynamic lift force from air density, velocity, wing area and lift coefficient using L = ½·ρ·v²·A·Cl.
- Rebar Development Length Calculator Estimates the development (anchorage) length of a reinforcing bar using the simplified rule Ld = bar diameter × development factor.
- Modulus of Resilience Calculator Computes the modulus of resilience Ur = σy²/(2E), the elastic strain energy a material can absorb up to yield.
- Electricity Carbon Footprint Calculator Estimate CO2 emissions from electricity use by multiplying kWh by a grid emission factor, with tons and trees-to-offset.
- RF Skin Depth Calculator Calculate the skin depth of an AC current in a conductor from frequency, conductivity and relative permeability.
- Wire Ampacity Calculator Estimate a wire's current-carrying capacity from its cross-sectional area and current density.
- Battery Life Calculator Estimate battery runtime in hours from battery capacity and current draw.
- Wheatstone Bridge Calculator Calculate the unknown resistance of a balanced Wheatstone bridge from the three known resistors.
- dB to Power Ratio Calculator Convert decibels to a power and amplitude ratio. dB to Power Ratio Calculator gives you the result instantly from a simple input.
- Spring Natural Frequency Calculator Calculates the natural frequency, angular frequency, and period of an undamped spring-mass system from the spring constant and mass.
- DC Bus Capacitor Calculator Calculates the bulk capacitance needed to hold up a DC bus for a given time as the voltage sags from nominal to minimum.
- Grade From Elevation Calculator Computes the slope grade percentage from a start and end elevation over a horizontal distance, plus the rise and slope angle.
- Signal to Noise Ratio Calculator Calculates the signal-to-noise ratio in decibels from signal and noise power values.
- Three-Phase Power Calculator Calculate three-phase electrical power from line voltage, current and power factor.
- Resistor Power Calculator Calculates the power dissipated in a resistor using P=V²/R or P=I²R from your known voltage, current and resistance.
- RLC Phase Angle Calculator Calculates the phase angle between voltage and current in a series RLC circuit from R, L, C and frequency.
- Section Modulus Calculator Calculates the elastic section modulus and moment of inertia of a rectangular beam cross-section.
- Gear Train Reduction Calculator Calculate the gear ratio, output RPM, and torque multiplication for a gear train from the driver and driven tooth counts and input speed.
- Pump Head Pressure Calculator Calculate the total pump head in metres from static lift, pipe friction loss and required outlet pressure.
- Wind Turbine Power Calculator Calculate the theoretical power output of a wind turbine from rotor diameter, wind speed, power coefficient (efficiency) and air density. See instantaneous power in watts and kilowatts plus estimated daily energy in kWh.
- Cut and Fill Calculator Compute net earthwork volume by subtracting fill from swell-adjusted cut, and see whether the site is a soil surplus or deficit.
- dBµV to Volt Converter Convert dBµV to volts. dBµV to Volt Converter gives you the result instantly from a simple input.
- Gear Module Calculator Calculate a spur gear's module from its pitch diameter and number of teeth (m = PD / N), plus the circular pitch and diametral pitch.
- LED Strip Power Supply Calculator Calculate the power supply wattage and current needed for an LED strip from its length and power draw.
- RC Snubber Design Calculator Calculates the RC snubber resistor and capacitor for a switching node from its ringing frequency and parasitic capacitance.
- Motor Full-Load Current Calculator Calculates the full-load current of a single- or three-phase AC motor from power, voltage, power factor and efficiency.
- Punch Force Estimate Calculator Estimate the impact force of a punch from the effective striking mass, impact speed and contact time (F = m·v ⁄ t), along with the kinetic energy delivered. A fun physics tool for martial artists.
- Descent Rate Calculator Computes the required descent rate in feet per minute from groundspeed and glidepath angle, plus altitude lost per nautical mile.