Free online calculator
Operational amplifier calculator

Example Gain = 11 — Vout = 11 V
Non-inverting: — Inverting:
What you enter
- Configuration
- R1 (Ω)
- R2 (Ω)
- Vin (V)
- Supply rails ±(V)
Free online calculator

Example Gain = 11 — Vout = 11 V
Non-inverting: — Inverting:
What you enter
AC voltage converterSine wave assumed. — —
Antenna length— the element is then a fraction of that wavelength, trimmed by a shortening factor k: for a quarter-wave. Two things trip people up. A λ/4 whip is…
Decibel converterVoltage: — Power: . Power goes as voltage squared, which is the whole reason for the 20 against the 10. A bench dB question is usually absolute, not…
Slew rate & bandwidthFull-power bandwidth: — the highest frequency at which the op-amp can still swing the whole amplitude. Past it the output stops following and simply…
Speaker crossover (1st order)A series capacitor keeps the lows out of the tweeter; a series inductor keeps the highs out of the woofer. First order = 6 dB/octave each side, crossing…
PCB trace ampacityEmpirical IPC-2221 formula — a design estimate, not a manufacturer guarantee.
Pull-up resistorkeeps the driver inside its sink rating, and keeps the released line above the input threshold.