Calculate the right tip for alcohol and beer delivery orders. Factor in heavy cases, delivery distance, minimum tip, and bill splitting for Drizly, Instacart, and liquor delivery. Free, instant, no signup.
Area converter for metric and imperial units - square feet to meters, acres to hectares, and more. Free, no install needed.
Estimate your blood alcohol content (BAC) using the Widmark equation. Enter weight, gender, drinks consumed, and time elapsed to calculate current BAC level, impairment status, and time to sober up.
Calculate your Body Mass Index (BMI) instantly. Get health category, healthy weight range, and personalized insights based on your height and weight.
Estimate your basal metabolic rate and daily maintenance calories using the Mifflin-St Jeor formula. Supports metric and imperial units for accurate TDEE planning.
Estimate body fat percentage using U.S. Navy measurements. Get fat mass, lean mass, and category instantly for fitness tracking.
Calculate your daily calorie needs based on age, gender, height, weight, and activity level. Get personalized targets for weight loss, maintenance, or muscle gain with macro breakdown.
Test how fast you can click with this free CPS (Clicks Per Second) test. Choose from 5s, 10s, 30s, or 60s durations and track your personal best click speed score.
Assess your cortisol load with 15 symptoms across energy, sleep, weight, mood, digestion, and immunity. Get a score, dimension breakdown, and evidence-based recommendations including your optimal IF eating window.
Calculate cosine similarity, dot product, and Euclidean distance between two vectors instantly. Built for embeddings, RAG pipelines, and ML similarity scoring. Free tool.
Calculate CPM (Cost Per Mille), CPC, CTR, and eCPM for advertising campaigns. Essential tool for marketers, publishers, and advertisers.
CSS unit converter for px, rem, em, vw, vh, and % with custom base font size and viewport settings - runs entirely in browser.
Convert data storage between bits, bytes, KB, MB, GB, TB, PB, and EB. Supports binary (1024) and decimal (1000) standards.
Docker run to compose converter turns any docker run command into a ready docker-compose.yml file, parsing ports, volumes, env vars and flags. Free, no signup.
Estimate how long it takes to download a file based on your internet speed. Enter file size (MB/GB/TB) and connection speed (Mbps/Gbps) to get instant download time estimates.
Ethereum unit converter turns wei, gwei, finney and ether into every other unit with exact BigInt math, plus a gas fee calculator for gwei to ETH and USD. Free, no signup.
Calculate your daily electrolyte targets during intermittent or extended fasting. Personalized for body weight, activity level, keto status, and sweat rate. Includes a morning/midday/evening dosing schedule.
Plans your personalized 5-day Fasting Mimicking Diet cycle based on Dr. Valter Longo's protocol. Calculates calorie and macro targets for each day adjusted for your body weight and goal.
Calculate fuel cost for any trip based on distance, vehicle MPG or L/100km, and gas price. Estimate road trip gas expenses with US and metric unit support.
Fetch GitHub repository metrics like stars, forks, open issues, and size using the public GitHub API. Quickly audit any repo without leaving your browser.
Fetch public GitHub profile metrics including followers, repos, and gists via the GitHub API - instant results, no login required.
Calculate your Glucose Ketone Index (GKI) from blood glucose and ketone readings. See your metabolic zone on the Seyfried scale and get goal-aligned guidance for weight loss, longevity, or therapeutic ketosis.
Project your weight loss timeline on GLP-1 medications (Ozempic, Wegovy, Mounjaro, Zepbound) using averages from published clinical trials. See projected weight at 12, 24, and 52 weeks.
Validate IBAN numbers instantly with country-specific length checks, formatting, and MOD-97 checksum verification for international bank accounts.
Calculate your ideal body weight using four medical formulas - Hamwi, Devine, Robinson, and Miller. Enter your height and gender to see a recommended healthy weight range.
Test your internet speed online. Measure download speed, upload speed, ping, and jitter instantly in your browser using Cloudflare's servers.
Format and beautify JavaScript code instantly with customizable indentation, brace style, and line length settings. Works with ES6+, JSX, and modern JS syntax. Free and private.
Analyze keyword frequency and density percentages in your content. Filter by minimum word length, exclude stop words, and identify top repeated terms for better on-page SEO.
Calculate your lean body mass (LBM) using the Boer, James, and Hume formulas or exact body fat percentage. Shows fat mass, lean mass, body fat category, and recommended protein intake.
Convert length and distance between metric and imperial units. Convert cm to inches, feet to meters, miles to kilometers, and more.
Lighthouse score calculator using the real log-normal curves and weights. Enter LCP, TBT, CLS, FCP and Speed Index to get your performance score and the biggest points left to win.
Shuffle, sort, reverse, or pick random items from any list. Paste items one per line and instantly randomize, sort A-Z, sort by length, or select N random winners.
Generate beautiful love letters for Valentine's Day, anniversaries, birthdays, and more. Choose from romantic, sweet, funny, poetic, heartfelt, or long-distance tones.
Test your microphone online for free. See a real-time audio waveform, measure volume levels, and check your mic's sample rate and settings.
Estimate your one rep max (1RM) using four proven formulas: Epley, Brzycki, Lander, and Lombardi. Generates a complete training weight table from 50–100% of your max for structured strength programming.
Predict your next period, ovulation day, and fertile window based on your cycle length. Track upcoming periods for 6 months and understand your cycle phases with this free menstrual cycle calculator.
Calculate your optimal daily protein intake based on weight, fitness goal, activity level, and age. Covers goals from RDA minimum to muscle building and athletic performance, with per-meal breakdown.
Convert between px, rem, em, and other CSS units instantly. Set your base font size and calculate responsive CSS values for modern web design.
Generate random words including nouns, verbs, and adjectives. Filter by length, starting letter, or part of speech for creative writing, games, and brainstorming.
Calculate running pace, finish time, or distance for any race. Supports 5K, 10K, half marathon, marathon and custom distances. Includes split tables and equivalent race time predictions.
Free online scientific calculator with trigonometric, logarithmic, exponential, and statistical functions. Supports degree/radian modes, memory operations, and calculation history.
Preview how your page title, URL, and meta description can appear on Google search results. Track title and description length instantly.
Calculate the right battery storage size for your solar system or backup power needs. Compare LiFePO4, lithium-ion, AGM, and gel batteries with accurate amp-hour and cost estimates.
Speed converter supporting km/h, mph, m/s, ft/s, knots, and Mach. Instant results for any velocity unit - free, no signup, works in your browser.
Look up SRV DNS records and inspect priority, weight, port, and target host values for service routing validation - no signup needed.
Generate systemd .service unit files for Linux. Configure service name, user, exec command, restart policy, and environment variables. Free, runs entirely in your browser.
Calculate your Total Daily Energy Expenditure (TDEE) and BMR using the Mifflin-St Jeor equation. Get daily calorie targets for weight loss, maintenance, and muscle gain.
Temperature converter for Celsius, Fahrenheit, and Kelvin. Get instant results with formula breakdowns - free, browser-based, no install needed.
Text line sorter - sort alphabetically, numerically, or by length, reverse order, and remove duplicates. Free, no signup required.
Convert text to speech online for free. Choose from multiple voices, adjust speed, pitch, and volume. Listen to articles, proofread text, or practice pronunciation - all in your browser.
Test your typing speed and accuracy with this free online typing test. Measure Words Per Minute (WPM), Characters Per Minute (CPM), and accuracy with real-time feedback.
Compare two products by price per unit and savings percentage to find the best value. Great for grocery shopping, bulk buying, and cost-per-use analysis.
Estimate your visceral fat area (VFA in cm²) using the Samouda anthropometric model - no blood test required. Get your risk level, waist-to-height ratio, and a personalised fat-loss action plan.
Volume converter for liters, gallons, cups, tablespoons, and more units. Get instant results for cooking or science - free, no signup required.
Calculate how much water you should drink daily based on your body weight, activity level, and climate. Get personalized hydration recommendations in liters, ounces, and glasses.
Check how eco-friendly any website is. Measure CO₂ emissions per page view, page weight, green hosting status, and carbon rating (A+ to F) using the Website Carbon API.
Weight converter for kilograms, pounds, ounces, stones, and more. Instant mass conversions in your browser - free tool, no install or login needed.
Calculate exactly how long it will take to reach your goal weight. Uses TDEE and your preferred weekly deficit to project a goal date, daily calorie target, and milestone timeline.