Code quality, test coverage, and productivity tools. Browse our free development tools below — all calculators are instant, accurate, and require no sign-up.
3D Printing Cost Calculator — Estimate 3D printing costs including filament, electricity, time, and wear. Compare materials and optimize your print settings for the best value.
3D Render Time Calculator — Estimate 3D rendering time based on scene complexity, resolution, samples, and hardware. Compare CPU vs GPU rendering and plan your render farm budget.
Antipode Calculator — Find the antipodal point (opposite side of Earth) for any coordinates. Visualize the exact location diametrically opposite to your position on the globe.
Amdahl's Law Calculator — Calculate theoretical maximum speedup from parallelization using Amdahl's Law. Visualize diminishing returns and find the optimal number of processors.
Audio File Size Calculator — Calculate audio file sizes for WAV, MP3, FLAC, AAC and more. Estimate storage needs based on duration, bitrate, sample rate, and channels.
Bandwidth-Delay Product Calculator — Calculate the bandwidth-delay product (BDP) for network connections. Optimize TCP window sizes and buffer settings for maximum throughput.
Caesar Cipher Calculator — Encrypt and decrypt text using the Caesar cipher. Shift letters by any amount, brute-force all 25 shifts, and learn classical cryptography basics.
Baud Rate Calculator — Calculate baud rates, bit rates, and serial communication timing. Convert between baud and bps for UART, RS-232, SPI, and I2C interfaces.
Chmod Calculator — Convert between chmod numeric and symbolic notation. Visualize Unix file permissions for owner, group, and others with an interactive permission builder.
CBM Shipping Calculator — Calculate cubic meter (CBM) volume and shipping costs for freight. Estimate container fill, dimensional weight, and compare LCL vs FCL options.
CV Screening & Interview Time Calculator — Estimate total time for hiring pipelines: CV screening, phone screens, technical interviews, and final rounds. Plan recruiting capacity and timelines.
Code Review Time Calculator — Estimate code review duration based on lines changed, complexity, and context switching. Optimize review processes for efficiency.
Cyclomatic Complexity Calculator — Calculate McCabe cyclomatic complexity from edges, nodes, and connected components. Classify code complexity and risk levels.
Developer Productivity Calculator — Calculate a weighted developer productivity index from commits, PRs, reviews, incidents resolved, and story points delivered.
Git LFS Cost Calculator — Calculate Git LFS storage and bandwidth costs. Compare pricing across GitHub, GitLab, and Bitbucket for large file storage.
Frames to Timecode Calculator — Convert between video frame numbers and SMPTE timecode (HH:MM:SS:FF). Supports 24, 25, 29.97 drop-frame, 30, and 60 fps standards.
Hash Identifier Calculator — Identify hash types by length and format. Generate hash checksums (MD5, SHA-1, SHA-256, SHA-512) and compare hash properties and collision resistance.
Image File Size Calculator — Estimate image file sizes from resolution, bit depth, and format. Compare JPEG, PNG, WebP, AVIF, and RAW sizes with compression ratios.
Lines of Code Calculator — Calculate LOC, SLOC, blank lines, comment lines, and comment ratio for your codebase. Analyze code composition metrics.
IP Subnet Calculator — Calculate IPv4 subnets: network/broadcast addresses, host ranges, wildcard masks, and CIDR notation. Plan subnetting for any network size.
Parity Bit Calculator — Calculate even and odd parity bits for binary data. Visualize error detection in serial communication, check Hamming distance, and learn binary parity.
Monorepo vs Polyrepo Build Calculator — Compare monorepo and polyrepo build times. Calculate affected package builds vs per-repo builds with dependency overhead.
Pixels Per Inch (PPI) Calculator — Calculate display pixel density (PPI) from resolution and screen size. Compare devices, check Retina thresholds, and understand pixel density impact.
Pixels to Print Size Calculator — Convert pixel dimensions to physical print size at any DPI. Supports inches, centimeters, and standard paper/photo sizes with quality indicators.
Pizza Tip Calculator — Calculate fair tips for pizza delivery based on order total, distance, weather, and service quality. Includes per-person splits and tipping etiquette guidelines.
PR Merge Time Calculator — Estimate pull request merge time from first review through iterations, CI checks, and approval wait. Reduce PR cycle time.
RAM Latency Calculator — Calculate RAM latency in nanoseconds from CAS latency and clock speed. Compare DDR3, DDR4, and DDR5 modules to optimize memory performance for your PC build.
Pyramid Block Calculator — Calculate the number of blocks, total weight, and construction parameters for a pyramid. Supports step pyramids and smooth-sided pyramids with custom block dimensions.
Repository Size Calculator — Estimate Git repository size from objects, LFS files, and history depth. Calculate expected clone times at different speeds.
Resolution Scale Calculator — Calculate scaled resolution, pixel count, and aspect ratio for displays, games, and video rendering. Convert between common resolutions and custom scaling percentages.
Screen Magnification Calculator — Calculate effective magnification, virtual image size, and viewing angle for screen magnifiers, loupes, and accessibility zoom settings.
RGB Color Calculator — Convert between RGB, HEX, HSL, and HSV color formats. Explore color harmony, contrast ratios, and generate complementary palettes for web design.
Screen Size Calculator — Calculate display dimensions, PPI, aspect ratio, and viewable area from diagonal size and resolution. Compare monitors, TVs, tablets, and phones.
Search Engine Ranking Calculator — Estimate organic click-through rates (CTR), traffic potential, and revenue from search engine rankings. Model SERP positions 1-100 with custom search volumes.
Skull Index (Cephalic Index) Calculator — Calculate the cephalic index from head width and length measurements. Classify skull shape as dolichocephalic, mesocephalic, or brachycephalic with visual indicators.
Solar Noon Calculator — Calculate the exact time of solar noon, sunrise, sunset, and day length for any location and date. Includes equation of time, solar declination, and twilight times.
Sprint Velocity Calculator — Calculate sprint velocity from completed story points. Forecast remaining work and estimate project completion timelines.
Story Points to Hours Calculator — Convert story points to estimated hours using your team's average velocity. Calculate confidence intervals for sprint planning.
Team Capacity Calculator — Calculate available team capacity in hours after accounting for meetings, PTO, and non-coding overhead for sprint planning.
Technical Debt Estimator — Estimate technical debt in hours and as a ratio of development effort. Prioritize remediation based on complexity and impact.
Test Coverage Calculator — Calculate line and branch code coverage percentages. Determine how many additional lines need testing to reach your target.
Test Suite Runtime Calculator — Calculate total test suite runtime and estimate parallelized execution time across multiple workers with overhead factors.
Test Flakiness Rate Calculator — Calculate test flakiness rate and estimate the cost of flaky tests in wasted CI time, developer productivity, and pipeline reruns.
Typing Speed Calculator — Calculate your typing speed in WPM, CPM, and accuracy. Time yourself with custom text, analyze error patterns, and track improvement over sessions.