Frequency & Wavelength Calculator
Convert between frequency and wavelength, calculate antenna lengths, and estimate EMF exposure against ICNIRP safety limits.
| Band | Frequency Range | Wavelength Range | Common Uses |
|---|---|---|---|
| AM Radio | 530 – 1710 kHz | 175 – 566 m | Broadcast radio |
| FM Radio | 88 – 108 MHz | 2.78 – 3.41 m | Music radio |
| WiFi 2.4 GHz | 2.4 – 2.4835 GHz | 12.1 – 12.5 cm | Wireless networking |
| 5G (sub-6) | 3.3 – 4.2 GHz | 7.1 – 9.1 cm | Cellular / 5G |
| Bluetooth | 2.4 – 2.485 GHz | 12.1 – 12.5 cm | Short-range wireless |
How to Use This Calculator
Three tools in one for RF and electromagnetic calculations.
Select a Tab
Choose from Frequency to Wavelength conversion, Antenna Length calculator, or EMF Exposure estimator. Each tab has its own inputs and outputs.
Enter Your Values
Type in the frequency or select units. The calculator instantly converts between Hz, kHz, MHz, GHz and wavelength in m, cm, mm, or μm using λ = c/f.
Read the Results
See the converted wavelength, common band designation, and antenna lengths. In EMF mode, compare your exposure against ICNIRP safety limits with a color indicator.
Frequently Asked Questions
Common questions about frequency, wavelength, and EMF calculations.
Use the formula λ = c / f where c is the speed of light (3×10⁸ m/s). Divide the speed of light by the frequency in Hz to get the wavelength in meters. This calculator handles unit conversions automatically.
For a half-wave dipole, length = λ / 2. For a quarter-wave antenna, length = λ / 4. First find the wavelength from the frequency, then divide by 2 or 4 depending on antenna type.
ICNIRP sets general public E-field limits at 28 V/m for 10-400 MHz and 61 V/m for 400-2000 MHz. Occupational limits are higher. This calculator compares your results against these standards with a color-coded safety indicator.