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Free tech calculators for IP subnets, CIDR notation, bandwidth, and uptime. Essential networking and IT tools for developers and admins.
Binary arithmetic and base conversion, exact past 64 bits
See how long a download takes, in GB or GiB
Convert mAh, Ah and Wh, and estimate runtime
Video and audio bitrate, file size and duration
Find which part limits your PC, measured in fps
How long a file takes to upload, in GB or GiB
Take a free typing test and measure your WPM
Convert bytes, KB, MB, GB, TB and PB exactly
Measure JSON bytes and check platform limits
Compare your screen time to the published average
Guess resistance, crack time and NIST 800-63B rev 4 checks
Convert, add and mask hex, binary, octal and decimal
Transfer time, required rate, or data moved
Turn CAS latency and MT/s into real nanoseconds
Usable capacity, efficiency and real fault tolerance for any RAID level
Convert watts and hours to watt-hours, kWh and joules
Decode packet hex into protocol layers and verify every checksum
Convert CIDR to a range, split a block, or aggregate blocks
Prefix, address range, /64 count and IANA address type
How much internet speed you need, and how long a transfer takes
Convert Mbps, MB/s and every rate in between
Text to binary, hex, decimal or octal — and back, in real UTF-8
Paste code, get its time and space Big-O with the derivation
Array memory footprint, and how to read its length
Generate and verify SHA-256, MD5, SHA-1, SHA-512 and SHA-3 digests
Convert words, pages or code to tokens — exact for OpenAI models
Price one LLM API call and compare it across every model
Monthly LLM API bill with caching and batch discounts
See whether your prompt fits an LLM context window
Compare self-hosted GPU vs API inference costs
Pick your GPU and see which LLMs actually fit
Calculate CO₂ emissions from AI model training and inference
Estimate hallucination probability for LLM outputs
Calculate return on investment for AI implementations
Parameters, VRAM and GPU fit from a model's real architecture
Convert text to Morse code and Morse code to text
Style text in 10 Unicode fonts for bios and display names
Convert text to Wingdings symbols and decode back
Convert English to pig latin instantly
Make zalgo, cursed and corrupted text, then clean it back
Generate Lorem Ipsum placeholder text, plus the full classic passage.
UPPER, lower, Title Case in 4 style guides, camelCase and slugs.
Generate UUID v4, v6, v7, ULID and NanoID in bulk — or decode one.
Create free QR codes for URLs, Wi-Fi, vCard & more — with logo and color
Generate strong random passwords & memorable passphrases, with live strength
Convert text to braille and braille to text online
Convert English to Egyptian hieroglyphics instantly
Calculate allowed downtime from SLA percentage and check compliance
Calculate downtime costs and revenue impact
Network, broadcast, mask and usable hosts for any IPv4 subnet
How many users one server holds, and what limits it
The machine N users need, and how many of them
Amdahl's Law speedup and honest CPU core sizing
Calculate optimal RAM for your PC, workstation, or server
Project data storage needs and capacity planning over time
Calculate storage requirements for backup strategies
Calculate data restoration time and recovery metrics
Estimate monthly cloud infrastructure costs
Estimate total costs for cloud migration projects
Estimate monthly costs for Amazon EC2 instances
Calculate CPU and memory resources for Kubernetes pods and deployments
Crack times by hash algorithm, work factor and GPU count
Calculate days until your SSL certificate expires
Measure a JWT and check it against cookie and header limits
Calculate CVSS v3.1 vulnerability severity scores
Estimate the financial impact of a data breach
Assess organizational phishing vulnerability and risk
Calculate MFA rollout metrics, ROI, and security improvements
Calculate risk severity scores using ISO 27001 and NIST frameworks
Estimate GDPR penalties based on violation type and circumstances
Effective MTU and TCP MSS from real protocol overhead
Find the bandwidth-delay product and the TCP window a link needs
Calculate network latency: propagation, transmission, and processing delays
Measure network jitter from ping: PDV, buffer size and the ITU limits
See what your packet loss does to throughput, calls, video and games
See how much bandwidth VPN encapsulation costs, and how many users fit
Predict WiFi range, coverage area and access points from the ITU indoor model.
Work out how many WiFi access points a building needs, and where to put them
Paste your code and get its cyclomatic complexity, function by function
Coverage by criterion, checked against requirements we can cite
Count SLOC, comments and blanks from pasted code, then estimate effort
Calculate optimal cache size, hit rates, and AMAT performance metrics
Calculate rate limits, token bucket metrics, and throttling analysis for APIs
Calculate data compression ratio, space savings, and efficiency
Analyze JavaScript bundle sizes, download times, and performance impact
Calculate optimal K8s node sizes and cluster configuration
Calculate optimal Kubernetes pod replicas for your workload
Calculate HPA scaling triggers and threshold zones for Kubernetes
Calculate SRE error budgets from SLO targets for reliability engineering
Calculate error budget burn rates for SLO-based alerting
Calculate Mean Time To Repair for incident management
Calculate the total cost of IT incidents and outages
Calculate storage requirements for log management systems
Project log storage growth over time with trend analysis
See which AES, RSA, ECC and hash key sizes are equally strong.
Assess security risk of OAuth 2.0 scope configurations
Assess your organization's Zero Trust Architecture maturity
Assess third-party vendor security and compliance risk
Estimate machine learning model training time and cost
Calculate training steps, iterations, and batch optimization
Calculate ML classification metrics from confusion matrix
Calculate F1 and F-beta scores from precision and recall
Price a fine-tuning run on published vendor rates
Calculate vector database storage requirements
SNAT port utilisation, per instance or per pool
Calculate cache efficiency and performance metrics
Analyze Kubernetes cluster costs and find savings opportunities
Calculate server, bandwidth, and GPU requirements for metaverse platforms
Calculate service level agreement breach penalties and service credits
Analyze compliance posture and identify gaps
Calculate Total Cost of Ownership for SIEM solutions
Assess Security Operations Center maturity
Assess ISO 27001 certification readiness
Assess your organization's overall cybersecurity maturity
Assess software dependency security risks and vulnerabilities
Measure DevOps performance with four key metrics
Monitor ML model input data distribution changes
Detect concept drift in ML model performance
Evaluate ML model fairness across demographic groups
Assess organizational AI governance maturity across 6 dimensions
Assess autonomous AI agent risks with safeguard analysis
Map RSA, ECC and AES to their NIST post-quantum replacement
Estimate proving and verification costs for zero-knowledge proofs
Analyze and optimize decentralized autonomous organization governance metrics
Essential tools for IT professionals, developers, and network administrators. Calculate subnet masks, bandwidth requirements, storage needs, and more with our comprehensive technology calculator suite.
Calculate IP subnets, CIDR notation, bandwidth, and network capacity with precision.
Convert data formats, calculate hash values, and handle encoding/decoding operations.
Plan storage requirements, RAID configurations, and backup strategies effectively.
Calculate uptime percentages, latency, throughput, and other key performance indicators.
Automate tedious calculations that would otherwise require manual computation.
All calculations follow industry standards and best practices for IT operations.
Select the calculator that matches your technical need.
Enter your values in the appropriate format (IP addresses, sizes, etc.).
Review the calculated results and explanations.
Use the results to configure your systems or plan your infrastructure.
Bookmark frequently used calculators for quick access.
Design subnets, calculate IP ranges, and plan network topology efficiently.
Calculate storage needs, plan RAID configurations, and estimate resource requirements.
Convert data formats, generate hashes, and perform encoding operations quickly.
Estimate bandwidth needs, storage growth, and infrastructure scaling requirements.
Yes, all calculators use industry-standard algorithms and are suitable for production planning and configuration.