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Technology calculators

20 free technology tools, each with the formula and step-by-step working.

  • API Rate Limit CalculatorRequests per second your app needs.
  • Audio File Size CalculatorFile size from bitrate and duration.
  • Backup Window CalculatorTime to back up your data set.
  • Bandwidth CalculatorBandwidth needed for users and streams.
  • Battery Life CalculatorRuntime from capacity and current draw.
  • Cloud Hosting Cost CalculatorMonthly cloud bill from compute and egress.
  • Code Review Time CalculatorReview hours from lines changed.
  • EV Range CalculatorReal-world range from battery and efficiency.
  • Hash Collision CalculatorBirthday-problem collision odds.
  • IP Address Range CalculatorAddress counts across prefixes.
  • Password Entropy CalculatorEntropy bits and crack time.
  • Print Size CalculatorMaximum print size from image pixels.
  • Project Timeline CalculatorDuration with buffer and part-time staff.
  • RAID Capacity CalculatorUsable capacity and fault tolerance.
  • Screen PPI CalculatorPixel density and viewing distance.
  • Solar Battery Sizing CalculatorBattery bank size for days of autonomy.
  • Sprint Velocity CalculatorSprints needed to finish the backlog.
  • Subnet CalculatorHosts, mask and ranges for a CIDR block.
  • Technical Debt Cost CalculatorAnnual cost of carrying tech debt.
  • Uptime SLA CalculatorAllowed downtime for each SLA level.

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