Technology Calculator

Explore the numbers behind modern tech — track transistor scaling with the Moore's Law Calculator, estimate the environmental cost of compute with the AI Water Footprint and Cryptocurrency Footprint calculators, decode storage specs with the Byte Conversion Calculator, and compare screens side by side with the Pixel Density (PPI) Calculator.

The list is ordered by real usage so the most-reached-for tools are right up front. Flip to the Trending tab to see what's generating interest today. Every calculator is free, no account required, and works on any device.

  • Bitcoin Mining Profit Calculator
    Estimate Bitcoin mining profit per day, month and year from hash rate, power use, electricity cost, BTC price, network difficulty and pool fee.
  • Crypto Mining Profitability Calculator
    Estimate GPU crypto mining profit from your hashrate, network hashrate, block reward, coin price, power draw and electricity rate. Daily, monthly and yearly.
  • Audio File Size Calculator
    Estimate audio file size from bitrate and duration. Convert kbps and minutes or hours into MB, KB and GB instantly with this free calculator.
  • 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 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • Amdahl's Law Speedup Calculator
    Calculate theoretical speedup with Amdahl's Law. Enter the parallel fraction and processor count to find overall speedup, max speedup, and efficiency.
  • 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.
  • LLM Tokens to Words & Cost Calculator
    Convert LLM tokens to an estimated word count and compute API cost from a price per 1,000 tokens. Quick estimate for GPT, Claude and other models.
  • WCAG Color Contrast Ratio Calculator
    Check the WCAG 2.x color contrast ratio between two hex colors. See if your text passes AA and AAA accessibility standards for normal and large text.
  • Password Crack Time Calculator
    Estimate how long a brute-force attack needs to crack your password from its length, character set and an attacker's guesses per second.
  • Text to Binary (ASCII) Converter
    Convert any text to binary online. Each character becomes its ASCII code, then an 8-bit binary string. Get spaced, continuous, and decimal output instantly.
  • 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.
  • 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.
  • 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.
  • LLM VRAM Requirement Calculator
    Estimate the GPU VRAM needed to run a large language model. Enter parameters in billions and choose FP16, 8-bit, or 4-bit quantization.

Frequently asked questions

What kinds of technology questions can I answer here?

This section covers hardware performance metrics, storage unit conversions, display quality analysis, and environmental impact of computing. You can model Moore's Law transistor growth, compare PPI across screens, convert bytes to gigabytes, and explore the water or carbon footprint of AI inference and crypto mining.

How accurate are the results?

Each calculator uses published formulas and well-established reference values — Moore's Law growth rates, standard display math, official storage conversion factors. Results are accurate for educational and planning purposes. For critical technical work, always cross-check against the manufacturer's specifications or an authoritative technical standard.

Do you store the data I enter?

No. All calculations run in your browser. Nothing you input is transmitted to our servers or retained in any way.

Which technology calculators are most popular?

The Byte Conversion Calculator and Pixel Density (PPI) Calculator are among the most visited, along with the Computer Storage Units Conversion Calculator. The list is ordered by real usage, and the Trending tab highlights whichever tools are spiking in popularity right now.

Are these tools free to use?

Yes — entirely free, no sign-up, no subscription. Open any tool on your phone, tablet, or desktop and start calculating immediately.

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