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RF Link Budget CalculatorCalculate received RF signal power (dBm) from transmit power, antenna gains, path loss, and system losses. Free link budget calculator with EIRP.
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Watts to dBm CalculatorConvert power in watts to dBm instantly. Free Watts to dBm calculator using dBm = 10·log10(W / 0.001) for RF, antenna, and signal power conversions.
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Wildcard Mask CalculatorConvert a subnet mask or CIDR prefix to its wildcard (inverse) mask. Each octet = 255 − mask octet. Perfect for Cisco ACLs and OSPF.
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EIRP CalculatorCalculate EIRP (Effective Isotropic Radiated Power) in dBm, dBW and watts from transmitter power, antenna gain and cable loss.
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TCP Throughput CalculatorCalculate maximum TCP throughput from window size and round-trip time (RTT). Free bandwidth-delay product tool in Mbps, Kbps and bps.
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Number of Subnets CalculatorCalculate the number of subnets created when you subnet an IPv4 network. Enter the original and new prefix lengths to find subnets, borrowed bits, and hosts.
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Data Transfer Rate ConverterConvert data transfer rates between bps, Kbps, Mbps, Gbps, and B/s, KB/s, MB/s, GB/s instantly. Free online bandwidth and speed unit converter.
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Download Time CalculatorEstimate how long a file takes to download from its size and your internet bandwidth, with an optional protocol overhead factor. Free and instant.
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Network & Broadcast Address CalculatorFree IPv4 network and broadcast address calculator. Enter an IP and CIDR prefix to get the network, broadcast, subnet mask, host range and address count.
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IP Subnet Mask CalculatorFree IPv4 subnet calculator. Enter an IP and CIDR prefix to get the subnet mask, network & broadcast address, usable host count, and full host range.
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Data Storage Conversion CalculatorConvert between bytes, KB, MB, GB, TB and PB using binary (1024) or decimal (1000) systems. Fast, accurate data storage unit converter.
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CIDR to Subnet Mask CalculatorConvert any CIDR prefix length (/0 to /32) into its dotted-decimal subnet mask, wildcard mask, total addresses, and usable host count instantly.
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IP Address to Binary CalculatorConvert any IPv4 address to binary, a 32-bit decimal integer, and hexadecimal. Enter four octets (0-255) for instant dotted-binary output.
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VoIP Bandwidth CalculatorCalculate VoIP bandwidth per call and total for concurrent calls. Factors in codec bitrate, packetization interval and IP/UDP/RTP header overhead.
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dBm to Watts CalculatorConvert dBm to watts and milliwatts instantly. Enter a power level in dBm to get the equivalent power in W using P = 10^((dBm−30)/10).
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Hosts per Subnet CalculatorCalculate the maximum usable hosts per IPv4 subnet from the prefix length using 2^(32−prefix) − 2. Instant CIDR host count for any /n.
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Free Space Path Loss CalculatorCalculate Free Space Path Loss (FSPL) in dB from distance (km) and frequency (MHz). Uses the standard 32.44 constant RF link-budget formula.
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VLSM CalculatorFree VLSM calculator: enter a base network and host requirements to get optimal subnets, prefix lengths, usable ranges, and broadcast addresses.
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IP Subnet & Host Count CalculatorCalculate usable hosts, subnet mask, wildcard mask and total addresses from any IPv4 CIDR prefix (/0 to /32). Free subnetting tool.
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IP Camera Bandwidth CalculatorCalculate total network bandwidth (Mbps) and storage for IP/CCTV camera systems from bitrate per camera and number of cameras. Free online tool.
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WiFi Coverage Area CalculatorEstimate WiFi coverage area from router range and find how many routers or access points you need to cover your home or office.
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Website Bandwidth CalculatorEstimate your website's monthly bandwidth in GB/TB from average page size, monthly pageviews and a redundancy/overhead percentage. Free hosting planner.
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Subnet Mask / CIDR CalculatorCalculate usable hosts, total addresses, and host bits for any CIDR prefix (/0 to /32). Fast IPv4 subnet calculator using 2^(32−prefix)−2.
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Shannon Channel Capacity CalculatorCalculate the maximum data rate of a noisy channel with the Shannon-Hartley theorem C = B·log2(1 + S/N) from bandwidth and SNR in dB.
