Science cluster
Electronics & Electromagnetism Calculators
Size circuits and compute voltage, current, resistance, impedance, and magnetic-field values for electrical and RF design.
Top calculators
A short starting set for the most common electronics & electromagnetism calculators workflows.
EMF Exposure Calculator: RF Power Density, ICNIRP & FCC Limits
Calculate far-field RF power density, EIRP, electric and magnetic field strength, then screen the result against ICNIRP 2020 and FCC exposure reference levels.
Speaker Wire Gauge Calculator for Run Length, Impedance and Loss
Calculate a copper speaker-wire AWG from one-way run length, speaker impedance, amplifier power and allowed cable loss.
Hall Voltage Calculator: Solve Current, Field, Density, or Thickness
Compute Hall voltage, current, magnetic field, carrier density, or sample thickness from the ideal Hall-effect relation V_H = I B / (n q t).
Battery Voltage to State of Charge Calculator for Li-ion, LiFePO4 and Lead-Acid
Estimate battery state of charge from rested pack voltage for Li-ion, LiFePO4, AGM, flooded deep-cycle and starter lead-acid batteries, with temperature reference and load warnings.
Straight-Wire Magnetic Field Calculator | Field Strength in µT
Find the magnetic-field magnitude in microteslas at a specified perpendicular distance from a long straight current-carrying wire.
Helmholtz Coil Center-Field Calculator | Midpoint Magnetic Field Estimate
Estimate the magnetic field at the center of a Helmholtz coil pair from coil radius, turns per coil, and current, with results in tesla, millitesla, and microtesla.
Wire Gauge Ampacity Calculator - Estimate AWG Current After Derating
Estimate wire ampacity for common AWG copper or aluminum conductors after insulation-temperature, ambient-temperature, and conductor-bundling derating.
EV Charger Load Management Planner | Panel Capacity & Charging Costs
Plan EV charging against your home's panel capacity, compare full-power and managed current, and estimate off-peak charging costs.
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Battery Voltage to State of Charge Calculator for Li-ion, LiFePO4 and Lead-Acid
Estimate battery state of charge from rested pack voltage for Li-ion, LiFePO4, AGM, flooded deep-cycle and starter lead-acid batteries, with temperature reference and load warnings.
Electric vs Gas Dryer Cost Calculator: Monthly Cost and Payback
Compare electric and gas clothes dryer running costs from loads per week, kWh and therms per load and your own utility rates, then see the gas payback period.
EMF Exposure Calculator: RF Power Density, ICNIRP & FCC Limits
Calculate far-field RF power density, EIRP, electric and magnetic field strength, then screen the result against ICNIRP 2020 and FCC exposure reference levels.
Ethernet Cable Attenuation and Maximum Distance Calculator
Calculate Ethernet channel insertion loss, remaining dB margin and maximum horizontal cable distance for Cat5e, Cat6, Cat6A, Cat7 and Cat8 links.
EV Charger Load Management Planner | Panel Capacity & Charging Costs
Plan EV charging against your home's panel capacity, compare full-power and managed current, and estimate off-peak charging costs.
FM Radio Broadcast Range Calculator - Coverage Distance
Estimate how far an FM station reaches from transmitter power, frequency, antenna heights, and receiver sensitivity, using free-space loss and the radio horizon.
Hall Voltage Calculator: Solve Current, Field, Density, or Thickness
Compute Hall voltage, current, magnetic field, carrier density, or sample thickness from the ideal Hall-effect relation V_H = I B / (n q t).
Helmholtz Coil Center-Field Calculator | Midpoint Magnetic Field Estimate
Estimate the magnetic field at the center of a Helmholtz coil pair from coil radius, turns per coil, and current, with results in tesla, millitesla, and microtesla.
Speaker Wire Gauge Calculator for Run Length, Impedance and Loss
Calculate a copper speaker-wire AWG from one-way run length, speaker impedance, amplifier power and allowed cable loss.
Straight-Wire Magnetic Field Calculator | Field Strength in µT
Find the magnetic-field magnitude in microteslas at a specified perpendicular distance from a long straight current-carrying wire.
Wafer Yield Calculator: Die Per Wafer and Defect-Limited Yield
Count gross die per wafer by exact placement, then compare Poisson, Murphy, Seeds and negative binomial die yield and cost per good die.
Wire Gauge Ampacity Calculator - Estimate AWG Current After Derating
Estimate wire ampacity for common AWG copper or aluminum conductors after insulation-temperature, ambient-temperature, and conductor-bundling derating.