Electronics & Electrical Calculators
81 free electronics & electrical calculators in Other. The first 2 have a full write-up: the method, a worked example and questions specific to that calculator.
- Resistor CalculatorDecode resistor colour bands and compute series and parallel networks.
- Voltage Drop CalculatorCalculate voltage drop over a wire run and check it against code limits.
- 555 Timer CalculatorCalculate frequency and duty cycle for a 555 timer in astable mode.
- AC Power CalculatorCalculate real, apparent and reactive AC power from voltage, current and power factor.
- ADC Resolution CalculatorCalculate ADC step size, dynamic range and quantisation error for a given resolution.
- Alternator Output CalculatorCalculate alternator output power, current and derating for temperature and power factor.
- Apparent Power CalculatorCalculate apparent power in volt-amperes and the capacity it demands from supply equipment.
- appliance running costEstimate the running cost of an appliance from its wattage, usage hours and electricity rate generally.
- Band Pass Filter CalculatorDesign a band-pass filter from its lower and upper cutoff frequencies.
- Band Stop Filter CalculatorDesign a band-stop or notch filter to reject a specific frequency band.
- Battery Capacity CalculatorSize a battery bank in amp-hours for a required load, runtime and depth of discharge.
- Battery Charging Current CalculatorDetermine the correct charging current for a battery from its capacity and C-rate.
- Battery Charging Time CalculatorEstimate charging time from battery capacity, state of charge and charger current.
- Busbar Size CalculatorSize a copper busbar for a given current, checking current density and temperature rise.
- Cable Resistance CalculatorCalculate conductor resistance from material, length and cross-sectional area.
- Cable Size CalculatorSelect a cable size that satisfies both current capacity and voltage drop.
- Cable Voltage Drop CalculatorCalculate voltage drop along a cable and check it against the permitted limit.
- Capacitive Reactance CalculatorCalculate capacitive reactance and the current a capacitor passes at a given frequency.
- Conductor Resistance CalculatorCalculate resistance, current density and heating for a conductor at a given load.
- Current Divider CalculatorCalculate how current splits between parallel branches.
- Current Draw CalculatorWork out the current an appliance draws and whether the circuit can support it.
- DC Power CalculatorCalculate DC power, energy and running cost from voltage and current.
- dishwasher energy costEstimate the running cost of an appliance from its wattage, usage hours and electricity rate generally.
- Electrical Power CalculatorCalculate electrical power from any two of voltage, current and resistance.
- Electricity CalculatorWork out an appliance's electricity use and what it costs per day, month and year.
- fan running costEstimate the running cost of an appliance from its wattage, usage hours and electricity rate generally.
- Filter Cutoff Frequency CalculatorCalculate the corner frequency of RC and LC filters and the roll-off they achieve.
- Fuse SizeFree Fuse Size calculator with clear step-by-step results.
- Generator Frequency CalculatorCalculate generator output frequency from rotational speed and pole count.
- Generator Voltage CalculatorCalculate generator output voltage from flux, speed and winding turns.
- heater running costEstimate the running cost of an appliance from its wattage, usage hours and electricity rate generally.
- High Pass Filter CalculatorDesign a high-pass filter and calculate its response at any frequency.
- home cooling costEstimate the running cost of an appliance from its wattage, usage hours and electricity rate generally.
- home heating fuelEstimate the running cost of an appliance from its wattage, usage hours and electricity rate generally.
- hot tub heating costEstimate the running cost of an appliance from its wattage, usage hours and electricity rate generally.
- Impedance CalculatorCalculate the total impedance of a series RLC combination and its phase angle.
- Inductive Reactance CalculatorCalculate inductive reactance and the current an inductor passes at a given frequency.
- Inverting Op Amp CalculatorDesign an inverting amplifier stage and check its input impedance and offset.
- LED Power CalculatorCalculate LED power consumption, efficacy and the running cost of a lighting installation.
- LED Resistor CalculatorCalculate the series resistor needed to drive an LED at its rated current.
- LED Series Resistor CalculatorSize series resistors for LED strings and arrays, including power rating.
- lighting energy costEstimate the running cost of an appliance from its wattage, usage hours and electricity rate generally.
- Low Pass Filter CalculatorDesign a low-pass filter and calculate its response at any frequency.
- Motor Current CalculatorCalculate motor full-load current from its rating, voltage, efficiency and power factor.
- Motor Efficiency CalculatorCalculate motor efficiency and the annual cost of its losses.
- Motor Horsepower CalculatorConvert motor ratings between kilowatts and horsepower, including input power.
- Motor Power CalculatorConvert between motor input power, shaft output power and horsepower.
- Motor Slip CalculatorCalculate induction motor slip and what it reveals about loading.
- Motor Starting Current CalculatorEstimate motor inrush current and the voltage dip it causes on starting.
- Motor Synchronous Speed CalculatorCalculate synchronous speed from supply frequency and pole count.
- Motor Torque CalculatorConvert between motor power, speed and torque, and check starting torque.
- Non Inverting Op Amp CalculatorDesign a non-inverting amplifier stage with high input impedance.
- Ohm's LawFree Ohm's Law calculator with clear step-by-step results.
- Ohms Law CalculatorSolve voltage, current, resistance and power from any two known values.
- Op Amp Gain CalculatorCalculate op-amp gain and check it against the gain-bandwidth product.
- Peak DemandFree Peak Demand calculator with clear step-by-step results.
- Power Factor CalculatorCalculate power factor from real and apparent power, and the phase angle it implies.
- Power Factor Correction CalculatorSize the capacitor bank needed to raise power factor to a target value.
- Q Factor CalculatorCalculate the quality factor of a resonant circuit and the selectivity it provides.
- RC Circuit CalculatorAnalyse a series RC circuit for impedance, phase angle and filter response.
- RC Time Constant CalculatorCalculate the RC time constant and the charge or discharge curve it produces.
- Reactance CalculatorCalculate inductive and capacitive reactance across a frequency and find where they balance.
- Reactive Power CalculatorCalculate reactive power and the correction needed to reduce it.
- Real Power CalculatorCalculate the real power actually converted into useful work in an AC circuit.
- refrigerator energy costEstimate the running cost of an appliance from its wattage, usage hours and electricity rate generally.
- Resonant Frequency RLC CalculatorCalculate the resonant frequency of an LC or RLC circuit and the component values to tune it.
- RL Circuit CalculatorAnalyse a series RL circuit for impedance, time constant and phase angle.
- RLC Circuit CalculatorAnalyse a series RLC circuit for resonance, bandwidth and damping.
- room heating costEstimate the running cost of an appliance from its wattage, usage hours and electricity rate generally.
- Single Phase Power CalculatorCalculate single-phase power, current and cable loading from load and power factor.
- Three Phase Power CalculatorCalculate three-phase power and line current, including the √3 relationship.
- Timer IC CalculatorCalculate timing component values for a monostable timer pulse.
- Transformer Efficiency CalculatorCalculate transformer efficiency across load levels, including no-load and copper losses.
- Transformer Regulation CalculatorCalculate voltage regulation between no-load and full-load conditions.
- Transformer Size CalculatorSize a transformer in kVA for a given load, with headroom and diversity applied.
- Transformer Turns Ratio CalculatorCalculate transformer turns ratio and the voltage and current transformation it produces.
- Voltage Divider CalculatorCalculate the output voltage of a resistive divider and its loading effects.
- washing machine energy costEstimate the running cost of an appliance from its wattage, usage hours and electricity rate generally.
- Wind Turbine OutputFree Wind Turbine Output calculator with clear step-by-step results.
- Wire Ampacity CalculatorDetermine the derated current-carrying capacity of a cable in its installed conditions.
- Wire Gauge CalculatorConvert between AWG and cross-sectional area, and check ampacity.