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Low Pass Filter Cutoff Frequency Calculator
Cutoff frequency of an RC low pass filter.
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Cutoff frequency
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Cutoff frequency of an RC low pass filter.
Low Pass Filter Cutoff Frequency Estimator
Enter your numbers below for an instant estimate.
0
💡 Tip: fc = 1 / (2 pi R C)
How It Works
Key concepts behind this calculator
1
Enter Values
Fill in each field with your own numbers.
2
Calculate
Results update as you change the inputs.
3
Review
Read the breakdown and the explanation.
4
Adjust
Change values to compare scenarios.
Quick Reference Guide
Low Quick Guide
Typical values for reference.
| Resistance (ohms) | Capacitance (nF) | Spare | Cutoff frequency |
|---|---|---|---|
| 1000 | 100 | 0 | 1,592 Hz |
| 10000 | 10 | 0 | 1,592 Hz |
| 220 | 470 | 0 | 1,539 Hz |
| 4700 | 1 | 0 | 33,863 Hz |
| Rule of Thumb | Check inputs | Use as a guide | Round sensibly |
Common Questions
Low Pass Filter Calculator FAQ
Answers to common questions about this calculator.
It uses the formula shown with your inputs. Real conditions vary, so treat it as a guide.
fc = 1 / (2 pi R C)
It is an estimate based on the inputs you enter. Check real quotes, labels or official guidance for important decisions.
Yes. Replace each input with your own figures and the result updates instantly.