Tools

See current HF band conditions worldwide, or choose a region to see its active long-distance WSPR corridors. The display loads live data when the page opens, refreshes every five minutes, and can be refreshed manually at any time. This tool needs JavaScript to load current propagation data. Propagation view Global band conditions Europe to DX North America to DX South America to DX Asia to DX Oceania to DX Africa to DX Refresh now Loading current conditions… Updated — Solar flux — Kp index — Storm risk — Global band conditions Band Now Condition Tomorrow Regional propagation Corridor Best band WSPR activity Spots / TX No active DX corridors are reported for this region right now. ...

Convert between RF power and voltage levels. Choose an impedance, then enter any one value; the remaining values update automatically in your browser. This calculator needs JavaScript to perform the conversions. Load impedance 50 Ω — RF and microwave 75 Ω — television and video 600 Ω — audio Custom value Custom impedance (Ω) Power mW Power W Power level dBm Power level dBW RMS voltage V Peak voltage V Peak-to-peak voltage Vpp Voltage level dBmV Enter a value in any field to begin. ...