Technology Calculator

  • Video Bitrate Calculator from Target File Size
    Calculate the video bitrate needed to fit a clip into a target file size. Enter MB and duration to get kbps, with optional audio bitrate subtraction.
  • Screen Size from Diagonal Calculator
    Convert a TV or monitor diagonal size and aspect ratio into real screen width, height and area. Supports 16:9, 21:9, 4:3 and any custom ratio.
  • Password Entropy Calculator
    Calculate password entropy in bits from length and character set. Estimate how strong and hard to crack your password is using log2 of the charset size.
  • Qubit States Calculator
    Calculate the number of quantum states 2^n that n qubits can represent. Free qubit states calculator showing the exponential power of quantum computing.
  • Cloud Data Storage Cost Calculator
    Estimate your cloud data storage costs. Enter storage size in GB, price per GB/month, and duration to get total, monthly, and annual cost.
  • LLM API Cost Calculator
    Estimate LLM API costs from input/output tokens and per-1K-token prices. Calculate cost per request and total spend across many requests.
  • 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.
  • Battery Life Runtime Calculator
    Estimate how long a battery will last from its mAh capacity, load current, and efficiency. Get runtime in hours and minutes instantly.
  • Watts to Amps Calculator
    Convert watts to amps instantly. Enter power in watts and voltage to find the current in amps using amps = watts ÷ volts. Free DC power calculator.
  • 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.
  • 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.
  • MTBF / MTTR Availability Calculator
    Calculate network or system availability (uptime %) from MTBF and MTTR. See downtime percentage and estimated downtime hours per year instantly.
  • Megapixel Calculator
    Convert any pixel resolution to megapixels. Enter width and height in pixels to get total pixels, megapixels (MP), and the aspect ratio instantly.
  • SLA Uptime & Downtime Calculator
    Calculate allowed downtime from any SLA uptime percentage. See permitted outage per day, week, month, quarter or year in seconds, minutes, hours and days.
  • LLM Tokens to Words Calculator
    Convert between LLM tokens and words instantly. Estimate how many words a token count holds (or vice versa) using the ~0.75 words-per-token rule.
  • 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.
  • 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.
  • Data Transfer Time Calculator
    Estimate how long it takes to transfer files over a network, HDD or USB. Supports B/kB/MB/GB/TB, bps vs B/s, 1000/1024 base and transmission efficiency.

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