ONE FORMULA, ONE ANSWER
RC Low Pass Magnitude Calculator
Calculate magnitude response of an unloaded RC low-pass filter. Choose input units and calculate one value within the stated conditions.
Inputs
Calculations run in this browser. Scientific notation such as 1.2e-3 is supported. Do not group thousands.
Result
Voltage magnitude ratio |H|
Enter values and select Calculate.
|H| = 1/√(1+(2πfRC)²)
Assumptions
Required: R,C>0, f≥0, an ideal source and unloaded output across the shunt capacitor. Phase, complex response and parasitic components are excluded.
Displayed values are floating-point approximations. Design safety factors and unprovided error contributions are not calculated.
Formula references and credits
NaNa Lab created the code, descriptions, icons and preview images. Text, figures and code from the linked references have not been reproduced.
Physical constants: NIST / CODATA 2022. The values of μ₀ and ε₀ are measured recommendations, not exact defining constants. Values and precision notes are in the source record.
This site includes Google advertising and analytics, and Cloudflare analytics.