Category
Telecom & Networking
Free telecom and networking calculators: optical fiber link budget, IP subnet / CIDR and dB / dBm / mW conversion for planning and field work.
Calculators for transmission, access and network engineers who plan, install or troubleshoot links. Check a fiber route before you splice it, size an IP plan, or convert power levels without reaching for a spreadsheet.
The Optical Fiber Link Budget Calculator adds up fiber, connector, splice and splitter losses, compares them with the transmitter and receiver power, and tells you the link margin, the maximum reach and whether you need an attenuator. It works for point-to-point links and GPON / FTTH splits.
Next in this category: an IP subnet / CIDR calculator for IPv4 and IPv6, and a dB / dBm / mW converter. Everything runs in your browser; nothing you type is sent anywhere.
Optical Fiber Link Budget Calculator
Work out total link loss, power budget, link margin and maximum reach for a fiber link, with PASS / FAIL and attenuator advice.
Open toolIP Subnet / CIDR Calculator
Network, broadcast, host range and subnet splits for IPv4 and IPv6.
dB / dBm / mW Converter
Convert between dB, dBm and mW, and add or subtract gain and loss.