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.
Speaker Wire Gauge Calculator: AWG by Run Length and Impedance
Size speaker wire by run length, amplifier power and impedance. Get the minimum AWG plus cable resistance, power loss and dB drop against the 5 percent rule.
EMF Exposure Calculator - RF Power Density vs ICNIRP and FCC
Estimate far-field RF power density, electric field and magnetic field from transmitter power, gain and distance, then compare with ICNIRP 2020 and FCC limits.
Battery Voltage to SOC Calculator: Li-ion, LiFePO4 & Lead-Acid
Convert a rested battery voltage into state of charge for Li-ion, LiFePO4, AGM and flooded lead-acid packs, with 25 C temperature referencing and load-sag warnings.
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).
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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Browse 12 calculators matched to this topic, or return to the Science category.
Battery Voltage to SOC Calculator: Li-ion, LiFePO4 & Lead-Acid
Convert a rested battery voltage into state of charge for Li-ion, LiFePO4, AGM and flooded lead-acid packs, with 25 C temperature referencing and load-sag 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 vs ICNIRP and FCC
Estimate far-field RF power density, electric field and magnetic field from transmitter power, gain and distance, then compare with ICNIRP 2020 and FCC limits.
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: AWG by Run Length and Impedance
Size speaker wire by run length, amplifier power and impedance. Get the minimum AWG plus cable resistance, power loss and dB drop against the 5 percent rule.
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.