Capacitors Formulas
Capacitor formulas describe how charge, energy, and voltage relate in capacitive components and how capacitors behave over time in RC circuits. These calculators handle stored energy, charge, and timing so you can design filters, timers, and energy-storage stages with confidence. They are central to power decoupling, signal coupling, and analog timing.
Capacitors Formula Calculators
- Capacitive Reactance Xc = 1 / (2πfC)
- RC Time Constant τ = R × C
- Capacitor Energy E = ½CV²
- Capacitor Charge Q = C × V
- Series Capacitance 1/Ctotal = 1/C1 + 1/C2 + ... + 1/Cn
- Parallel Capacitance Ctotal = C1 + C2 + ... + Cn
- Capacitor Impedance with ESR Z = √(ESR² + Xc²)
- Capacitor Ripple Voltage ΔV = I / (2 × f × C)
- Capacitor Self-Resonant Frequency f_SRF = 1 / (2π × √(ESL × C))
- Constant-Current Capacitor Charge Time t = C × ΔV / I
- Dielectric Dissipation Factor DF = ESR × 2πfC
- Ceramic Capacitor Voltage Derating C_eff = C_rated × factor
- Capacitive Voltage Divider Vout = Vin · C1 / (C1 + C2)
- Spherical Capacitor C = 4πε0 · a · b / (b − a)
Related Formula Categories
Browse the full formulas index for all 32 categories.