Worked presets

RC time constant — common pairs, pre-computed

The time constant τ = R·C for the most common resistor / capacitor combinations, with the cutoff frequency and settling time worked out. Need a different pair? Open the interactive calculator.

1kΩ resistor

1kΩ × 1nF τ = 1.0 µs
1kΩ × 10nF τ = 10.0 µs
1kΩ × 100nF τ = 100.0 µs
1kΩ × 1µF τ = 1.00 ms
1kΩ × 10µF τ = 10.00 ms
1kΩ × 100µF τ = 100.00 ms

10kΩ resistor

10kΩ × 1nF τ = 10.0 µs
10kΩ × 10nF τ = 100.0 µs
10kΩ × 100nF τ = 1.00 ms
10kΩ × 1µF τ = 10.00 ms
10kΩ × 10µF τ = 100.00 ms
10kΩ × 100µF τ = 1.000 s

100kΩ resistor

100kΩ × 1nF τ = 100.0 µs
100kΩ × 10nF τ = 1.00 ms
100kΩ × 100nF τ = 10.00 ms
100kΩ × 1µF τ = 100.00 ms
100kΩ × 10µF τ = 1.000 s
100kΩ × 100µF τ = 10.000 s

Values assume an ideal first-order RC network — real parts have tolerance and ESR, so confirm against your components' datasheets.