Technology Calculator

  • PC Power Supply (PSU) Wattage Calculator
    Estimate the right PSU wattage for your PC build. Add CPU, GPU, RAM, storage and fans to get a recommended power supply size with 20% headroom.
  • LLM VRAM Requirement Calculator
    Estimate the GPU VRAM (GB) needed to run or serve a large language model from its parameter count, precision, and overhead factor.
  • Megabits to Megabytes per Second Converter
    Convert Megabits per second (Mbps) to Megabytes per second (MB/s) instantly. Just divide by 8 — find your real download speed in seconds.
  • DPI Calculator
    Calculate DPI (dots per inch) for printing from your image's pixel dimension and the intended print size in inches. Free print resolution tool.
  • Video File Size Calculator
    Estimate video file size from total bitrate and clip length. Get the result in MB and GB instantly for export, upload, and storage planning.
  • RGB to Hex Color Converter
    Convert RGB color values (0-255) to a hex color code instantly. Enter Red, Green and Blue to get the #RRGGBB hex used in CSS and web design.
  • Hex Color to RGB Converter
    Convert any hex color code (e.g. #3498DB) to its RGB values instantly. Supports 3- and 6-digit hex codes with a live color swatch preview.
  • Hex to Decimal Converter
    Convert any hexadecimal (base 16) number to decimal (base 10) instantly. Enter a hex value like 1A3F and get the exact decimal result with the formula.
  • Bits to Bytes Converter
    Convert bits to bytes instantly. Divide bits by 8 to get bytes (and bps to Bps). Free, accurate digital storage and data-rate unit converter.
  • IP Subnet Mask Calculator
    Free IPv4 subnet calculator. Enter an IP and CIDR prefix to get the subnet mask, network & broadcast address, usable host count, and full host range.
  • CCTV Storage Calculator
    Calculate how much disk space your IP CCTV cameras need. Enter bitrate, recording hours, cameras and retention days to get total GB and TB.
  • AI/LLM Token Cost Calculator
    Estimate the cost of LLM API calls from input/output tokens and per-1K-token prices. Calculate cost per call and total spend across many calls.
  • Crypto Mining Profitability Calculator
    Estimate your daily, monthly and yearly crypto mining profit from hashrate, network hashrate, block reward, coin price and electricity cost.
  • Hash Rate Converter Calculator
    Convert cryptocurrency mining hash rates between H/s, kH/s, MH/s, GH/s, TH/s, PH/s and EH/s instantly with this free hash rate converter.
  • Streaming Carbon Footprint Calculator
    Estimate the CO₂ emissions from video streaming. Enter hours, data rate, network energy and grid intensity to get grams and kg of CO₂ instantly.
  • Security Camera Storage (NVR) Calculator
    Calculate NVR/DVR hard drive storage for security cameras from bitrate, recording hours, retention days and camera count. Get GB and TB needed.
  • RAID Capacity Calculator
    Calculate usable RAID storage for RAID 0, 1, 5, 6 and 10. Enter disk count and size to see usable capacity, redundancy overhead and efficiency.
  • Charging Time Calculator
    Estimate how long it takes to charge a battery from its mAh capacity, charger output in mA, and charging efficiency. Free, instant results.
  • Monitor PPI (Pixels Per Inch) Calculator
    Calculate a monitor or screen's PPI (pixels per inch) from its resolution and diagonal size. Get pixel density, dot pitch and physical dimensions instantly.
  • PPI Pixel Density Calculator
    Calculate display PPI (pixels per inch), dot pitch, screen size, total pixels and aspect ratio from resolution and diagonal size in inches, cm or mm.
  • Computer (Digital) Storage Units Converter
    Convert digital storage between bits and bytes, decimal (kB, MB, GB) and binary (KiB, MiB, GiB) units. Free, accurate converter with the IEC standard explained.
  • RAID Capacity Calculator
    Calculate usable RAID storage capacity for RAID 0, 1, 5, 6 and 10. Enter disk count and size to see usable space, overhead and efficiency.
  • RAM Latency Calculator
    Calculate true RAM latency in nanoseconds from CAS latency (CL) and memory speed (MT/s). Compare DDR4 and DDR5 modules instantly with this free tool.
  • Transfer Speed from Transfer Time Calculator
    Calculate effective transfer speed (bps, kbps, Mbps, MB/s, GB/s) from data size and elapsed time. Choose decimal (1000) or binary (1024) prefix bases.

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