Wave Frequency & Period Calculator
Convert between wave frequency and period, and calculate wavelength from wave speed, free and instant right in your browser.
Enter Values
Minimum 0
Minimum 0
How to use this calculator
- Enter either a frequency or a period.
- Read the other.
How it works
Frequency and period are reciprocals: f = 1 ÷ T and T = 1 ÷ f.
Worked example
50 Hz. = a period of 0.02 s.
Common mistakes
- Entering both fields — enter just one and the tool finds the other.
- Confusing period (time per cycle) with frequency (cycles per second).
Frequently asked questions
How are frequency and period related?
They are reciprocals: frequency = 1 ÷ period. A 0.5-second period is 2 Hz.
How do I find wavelength?
Wavelength = wave speed ÷ frequency, so faster waves or lower frequencies have longer wavelengths.
What's the period of mains power?
At 50 Hz it's 0.02 s per cycle; at 60 Hz it's about 0.0167 s.
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Cite this tool
Zerdly. (2026). Wave Frequency & Period Calculator. Retrieved from https://www.zerdly.com/tools/wave-frequency-period-calculator/
Tip: Enter any known values to calculate the remaining results.
Designed to run locally in your browser. Tool inputs are not intentionally stored by Zerdly unless stated otherwise.