Industry-Specific

  • Hosts per Subnet Calculator
    Calculate the number of usable host IP addresses per subnet from a CIDR prefix length (/8 to /32). Fast IPv4 subnetting host count tool.
  • Car Payment Affordability Calculator
    Find the maximum car price you can afford from your monthly budget, down payment, APR, and loan term. See financed loan amount and total interest.
  • VinFast Total Cost of Ownership Calculator
    Estimate the true cost of owning a VinFast EV: combine purchase price, insurance, maintenance and charging, minus resale value, over your ownership years.
  • VinFast VF6 Charging Time Calculator
    Estimate how long it takes to charge a VinFast VF6 EV. Enter battery size, start/target charge, charger power and efficiency to get the time in hours and minutes.
  • VinFast Battery Subscription Cost Calculator
    Estimate your monthly VinFast battery subscription cost including mileage overage fees. Enter your fee, included miles, miles driven, and overage rate.
  • VinFast VF7 Charging Time Calculator
    Estimate how long it takes to charge a VinFast VF7 EV. Enter battery size, charger power, start and target charge level and efficiency to get the time.
  • Concurrent Users Bandwidth Calculator
    Calculate the bandwidth available per user when a connection is shared. Enter total Mbps and the number of concurrent users to get per-user Mbps and Kbps.
  • Reserved Instance vs On-Demand Savings Calculator
    Compare cloud Reserved Instance vs On-Demand pricing. Calculate your savings percentage, monthly savings, and total savings over a 1- or 3-year term.
  • Managed Database / RDS Cost Calculator
    Estimate monthly and annual cost of a managed database (RDS-style) from instance hourly price, storage GB, and provisioned IOPS.
  • CDN Bandwidth Cost Calculator
    Estimate your monthly CDN bill from data transfer (GB) and HTTP requests. Enter price per GB and per million requests to see total and annual cost.
  • Uptime / SLA Downtime Calculator
    Calculate allowed downtime for any SLA uptime percentage (99%, 99.9%, 99.99%) per day, week, month, quarter or year in seconds, minutes, hours and days.
  • Cloud Data Transfer / Egress Cost Calculator
    Estimate your cloud egress / data transfer bill. Enter GB transferred out, free tier allowance, and price per GB to see your billable cost instantly.
  • Decimal to Binary Converter
    Convert any decimal (base-10) number to binary (base-2) instantly. See the binary digits and bit count using the divide-by-2 remainder method.
  • Usable IP Address Count Calculator
    Calculate the number of usable IPv4 host addresses for any subnet prefix (/0 to /32) using usable = 2^(32 − prefix) − 2.
  • Binary to Decimal Converter
    Convert any binary number to decimal (base 10) instantly. Free binary to decimal converter calculator with step-by-step positional weighting.
  • RF Link Budget Calculator
    Calculate received RF signal power (dBm) from transmit power, antenna gains, path loss, and system losses. Free link budget calculator with EIRP.
  • Watts to dBm Calculator
    Convert 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.
  • Wildcard Mask Calculator
    Convert a subnet mask or CIDR prefix to its wildcard (inverse) mask. Each octet = 255 − mask octet. Perfect for Cisco ACLs and OSPF.
  • EIRP Calculator
    Calculate EIRP (Effective Isotropic Radiated Power) in dBm, dBW and watts from transmitter power, antenna gain and cable loss.
  • TCP Throughput Calculator
    Calculate maximum TCP throughput from window size and round-trip time (RTT). Free bandwidth-delay product tool in Mbps, Kbps and bps.
  • RPM from Speed Calculator
    Calculate engine RPM from vehicle speed, transmission gear ratio, axle ratio, and tire diameter using the standard 336 constant formula.
  • Stud Count Calculator
    Estimate how many wall studs you need by wall length and on-center spacing (16 or 24 in). Adds corner studs for fast framing material takeoffs.
  • Number of Subnets Calculator
    Calculate 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.
  • Concrete Footing Calculator
    Calculate concrete footing volume in cubic yards and cubic feet, plus the number of bags needed. Enter width, depth, length, quantity and waste %.

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