Ohm's Law Calculator
Voltage, current, resistance and power.
Resistance
6 Ω
Power
24 W
R = V ÷ I • P = V × I
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Electronics Calculators & Tools
Practical calculators for circuit design, PCB development and everyday electronics engineering.
RC Calculator
Calculate time constant and cutoff frequency from resistance and capacitance.
Time Constant (τ)
10 ms
Cutoff Frequency
15.915 Hz
τ = R × C • fc = 1 ÷ (2πRC)
PCB Trace Width Calculator
Estimate required copper trace width using IPC-2221.
Required Trace Width
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Trace Resistance
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Voltage Drop
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Power Loss
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IPC-2221 empirical trace-current approximation
Engineering estimate. Actual current capacity also depends on PCB construction, copper distribution, airflow and ambient temperature.
Ripple / Spike Filter Calculator
Estimate RC filtering of switching ripple and voltage transients.
Before
After Filter
Reference waveform
After Filter
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Attenuation
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RC Time Constant
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Cutoff Frequency
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Estimated Peak Source Current
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Estimated Input Pulse Energy
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First-order RC low-pass approximation
Reference estimate for a first-order RC filter. The graph is normalized for visualization and is not an absolute oscilloscope scale.
Voltage Divider Calculator
Calculate output voltage using your selected resistor values.
Output Voltage
6 V
Divider Current
0.6 mA
Vout = Vin × R2 ÷ (R1 + R2)
Inductance Calculator
Air-core single-layer coil using Wheeler's formula.
Calculated Inductance
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Inductance calculated using Wheeler’s formula for single-layer air-core coils (approximate).
Universal Unit Converter
Electrical values, prefixes and common engineering units.
From
→
To
Converted Value
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SMD Resistor Code Lookup
Decode standard numeric, EIA-96 and R-marked SMD resistors.
Resistance
10 kΩ
Code Type
3-digit
103 = 10 × 10³ Ω = 10 kΩ