Free Online Tools & Calculators

Board Foot Calculator Board feet, weight, cost, and species data for woodworkers 204 Closing Cost Calculator Estimate your total closing costs before you sign 215 Concrete Calculator Calculate concrete volume for slabs, footings, columns, and more 187 Decking Calculator Every material for your deck build, from boards to footings 691 Drywall Calculator Calculate sheets, tape, mud, screws, and corner bead for any room 203 Fence Calculator Calculate posts, rails, pickets, and concrete for any fence project 169 Flooring Calculator Estimate materials & cost for any flooring project 184 Gas vs Electric Appliance Calculator Real state energy prices for gas vs electric appliance cost comparison 548 HELOC Payment Simulator See the payment shock before you sign: draw period vs repayment modeling 408 Home Affordability Calculator Find out how much house you can actually afford 205 Home Equity Calculator See how much equity you've built and your borrowing power 189 Home Equity Loan Comparison Compare HELOC, cash-out refi, and personal loans side by side 195 Home Insurance Coverage Calculator Calculate your true replacement cost and coverage needs 171 Homebuyer Readiness Score Score your readiness to buy across five key pillars 150 Investment Property Analyzer Analyze rental deals with BRRRR and buy-hold models 157 Landscape Material Calculator Cubic yards, weight, and bag count for any landscaping material 296 Mortgage Payment Calculator Calculate your monthly mortgage payment with taxes and insurance 281 Mortgage Refinance Calculator Know your break-even date before you refinance your mortgage 128 Moving Cost Estimator Get a realistic estimate for your upcoming move — local or cross-country 185 Paint Calculator Calculate exactly how much paint you need for any room 160 Property Tax Estimator Estimate your annual property taxes and monthly escrow impact 165 Renovation ROI Calculator Find out which home improvements actually pay for themselves 192 Rent vs. Buy Calculator Find out whether renting or buying saves you more over time 194 Rental Profit Calculator Find out if your short-term rental will actually make money after all expenses 173 Roofing Calculator Calculate squares, bundles & materials by pitch 615 Solar Savings Calculator See if solar panels are worth it for your home and how fast they pay for themselves 835 Stair Calculator Design code-compliant stairs with the right rise, run, and materials 153 Tile Calculator Exact tile, grout, and adhesive quantities for any layout pattern 176 Tree Canopy Shade Calculator Shadow length and shaded area by season and latitude 1,587 Tree Pruning Calendar Species-aware pruning windows for 40+ trees 137 Tree Watering Calculator Weekly gallon targets by trunk size, age & season 817 Wallpaper Calculator Get the exact number of wallpaper rolls with pattern repeat math 162

BAC Calculator Estimate your blood alcohol content based on drinks, weight, and time 220 Biological Age Calculator Discover your body's real age based on your lifestyle 251 Blood Pressure Calculator Understand your blood pressure reading with clinical context 187 BMI Calculator Calculate your Body Mass Index and understand what it means 268 Body Fat Calculator Estimate your body fat percentage using Navy, circumference, or skinfold methods 198 Caffeine Calculator Calculate your safe daily caffeine limit and track intake 184 Calories Burned Calculator Calories burned by activity & duration 835 Chocolate Toxicity Calculator for Dogs Find out if the chocolate your dog ate is dangerous -- fast 759 Dog Food Calculator Precise daily feeding portions based on your dog's needs 228 Dog Years Calculator Convert your dog's age to human years using modern veterinary science 178 Due Date Calculator Calculate your estimated due date and track key pregnancy milestones 186 Fasting Calculator Plan your intermittent fasting schedule and see when your body enters each metabolic zone 215 Keto Calculator Calculate your personalized keto macro targets for fat, protein, and carbs 159 Life Expectancy Calculator See how your lifestyle choices impact your projected lifespan 1,252 Macro & Calorie Calculator Find your daily calories and macros based on your body and goals 290 Nutrition Label Analyzer Instant health grade and nutrition breakdown for any packaged food 123 One-Rep Max Calculator Estimate your one-rep max and plan your training percentages 173 Pace & Race Time Calculator Find your pace, finish time, or distance — with splits for every mile 194 Pregnancy Weight Gain Calculator Track recommended weight gain week by week through pregnancy 170 Protein Per Dollar Calculator Rank any food by protein grams per dollar with live USDA data 1,221 Recovery & Readiness Score Get a 0-100 readiness score to know when to push and when to rest 184 Sleep Cycle Calculator Find the best times to sleep and wake based on your sleep cycles 177 Steps to Distance Calculator Convert your step count into miles, kilometers, and calories burned 184 Supplement Stack Analyzer Check your supplement stack for interactions, overlaps, and optimal timing 196 TDEE Calculator Find your daily calorie target based on your body and activity level 233 Training Plan Builder Generate a progressive multi-week training plan for any goal 178 VO2 Max Calculator Estimate your VO2 max and cardio fitness age with four test protocols 188 Water Intake Calculator Personalized daily hydration guide 221

1099 vs W-2 Calculator Compare your real take-home pay as a contractor versus an employee 218 AdSense Revenue Calculator Estimate AdSense revenue by traffic, niche, and ad density 1,476 Break-Even Calculator Find out exactly how many units you need to sell before you profit 266 Business Valuation Calculator Estimate your business value using four valuation methods 208 Cash Flow Forecaster Build a 12-month rolling cash flow model with danger zone alerts 185 Client Profitability Scorecard Score up to 8 clients by profitability, effort, and relationship quality 173 Commission Calculator Calculate sales commission for flat, tiered, and accelerator structures 221 CTR Calculator Calculate Click-Through Rate and compare it to industry benchmarks 168 Employee Cost Calculator Calculate the true total cost of hiring an employee beyond salary 398 Freelance Rate Calculator Find your ideal hourly rate based on your income goals 249 Influencer ROI Calculator Measure the true ROI of your influencer marketing campaigns 191 Instagram Engagement Calculator Calculate engagement rate & compare benchmarks 191 Invoice Calculator Build line items, apply discounts and tax, and see your invoice total 196 Margin & Markup Calculator Convert between margin and markup instantly — and find your ideal price 202 Meeting Cost Calculator Watch your meeting cost tick up in real time 164 Project Estimator Estimate project timelines and costs with confidence 166 Proposal Win-Rate & Pricing Analyzer Find your sweet spot pricing and improve your proposal win rate 1,717 Quarterly Tax Estimator Calculate your estimated quarterly tax payments and avoid penalties 171 ROAS Calculator Calculate your Return on Ad Spend and see if your campaigns are profitable 158 SaaS Pricing Calculator Model your SaaS pricing tiers and project recurring revenue 198 Salary & Hourly Converter Convert between salary and hourly rate — see what you really earn 195 Salary Percentile Calculator Government wage data to know if you're paid fairly by occupation and state 1,160 Startup Runway Calculator See how long your cash lasts and when you need to raise or profit 202 TikTok Engagement Rate Calculator Measure TikTok video performance against niche benchmarks 219 YouTube Earnings Calculator Estimate YouTube ad revenue by views, niche, and audience geography 212

Age & Date Calculator Calculate exact age, date differences, and countdowns 222 Car Depreciation Calculator See how your car loses value year by year with a 10-year projection 233 Electrical Power Calculator Calculate watts, kVA, HP, motor starting, and amperage 188 Electricity Cost Calculator See how much any appliance or device costs you to run. 213 EV vs Gas Cost Calculator Real state energy prices, tax credits, and 5-year ownership cost 165 Fuel Cost Calculator Calculate your trip fuel cost and compare vehicles side by side 220 Generator Wattage Calculator Size your generator by checking off what you need to power 190 Loan Comparison Engine Compare up to 4 loans side by side with amortization curves 166 MPG Calculator Calculate fuel economy and trip costs 210 Net Worth Tracker & Analyzer Calculate your net worth with percentile ranking by age 264 Percentage Calculator Solve any percentage problem instantly — three modes, one tool 236 Real Hourly Wage Calculator Discover what you really earn per hour after all work costs 167 Retirement Readiness Calculator Find out if you will have enough to retire comfortably 205 Sales Tax Calculator Calculate sales tax for any US state with reverse tax mode 202 Subscription Audit Calculator Track all your subscriptions and find what to cut 226 Subscription Tracker Calculator Reveal the true cost of subscription creep 226 Tip Calculator Calculate the right tip and split the bill easily. 326 Travel Budget Calculator Live exchange rates for multi-destination trip budgeting 155 Unit Converter Convert between any units of measurement instantly 218

AI Content Detector Analyze text to estimate whether it was written by AI or a human 229 AI Grammar Checker Check grammar, punctuation, spelling, and style instantly 286 Bio & About Page Generator Generate 5 professional bio formats instantly as you type 181 Brand Voice & Tone Analyzer Analyze your writing style across six voice dimensions 162 Case Converter Convert text between 10 naming conventions in one click 186 Cold Email & Outreach Scorer Get a brutally honest 0-100 score on your cold emails 152 Content Brief Builder Generate structured SEO content briefs with outlines and titles 159 Email Subject Line Tester Score your email subject lines for open rates before you hit send. 181 Headline Analyzer Score your headlines for clicks, engagement, and emotional impact 256 Invisible Character Remover Detect and remove hidden Unicode characters from text 216 Jargon Ipsum Generator Generate hilarious profession-themed placeholder text 175 Markdown Editor Write, preview, and convert Markdown with live rendering. 182 Meta Tag Analyzer Generate and preview meta tags for Google and social media 167 Reading Level Analyzer Analyze your text's reading level with multiple scoring methods 268 Schema Markup Generator Generate JSON-LD structured data for Google rich results 159 SEO Content Analyzer Optimize your content for search engines with actionable scoring. 184 Social Media Optimizer Optimize your posts for every platform with character counts and scoring. 182 Text Diff Tool Compare two texts side by side and see every difference highlighted. 180 Word & Character Counter Count words, characters, and reading time as you type 245

AI Token Calculator Count tokens and estimate API costs for any AI model. 188 Color Converter & Palette Generator Convert colors between formats and generate harmonious palettes 203 Cron Expression Builder Build and decode cron expressions with a visual schedule editor. 188 CSS Generator Generate beautiful CSS gradients, shadows, and glassmorphism effects. 197 Design Token & Color System Generator Generate complete design systems from a single brand color 184 DNS Lookup Query and inspect all DNS records for any domain instantly 168 Encoding Toolkit Encode, decode, and convert between Base64, URL, HTML, and more. 171 Hash Generator Generate MD5, SHA-1, SHA-256, and SHA-512 hashes instantly 172 HTML Cleaner & Formatter Clean messy HTML from Word, Google Docs, and CMS editors 165 HTTP Security Header Grader Audit your HTTP security headers with A-F grades per category 160 IP Subnet Calculator Calculate subnet details from any IP/CIDR notation 149 JSON Formatter & Validator Format, validate, and explore JSON with instant error detection 206 JWT Decoder Decode, inspect, and validate JSON Web Tokens instantly. 169 Link Building Cost Calculator Estimate link building costs by DA, niche, and link type 168 Meta Tag Generator Generate SEO meta tags, Open Graph, and Twitter Cards with live previews 142 Password Generator Generate cryptographically secure passwords with strength analysis 152 QR Code Generator Generate customizable QR codes for URLs, WiFi, contacts, and more 154 Regex Tester Build and test regular expressions with live match highlighting 191 Robots.txt Generator Build and validate robots.txt files visually 157 SQL Formatter Format and beautify SQL queries instantly 145 SQL Query Builder & Explainer Build SQL visually or paste queries for plain-English explanations 185 UUID Generator Generate, validate, and format UUIDs instantly 167 XML Sitemap Generator Generate valid XML sitemaps with URL validation and smart splitting 176

Air Fryer Converter Convert oven recipes to air fryer settings instantly. 210 Baking Substitution Finder Find ingredient swaps with exact ratios and effectiveness ratings 184 BBQ & Smoking Calculator Estimate cook times, temps, and servings for any smoked meat 190 Brining Calculator Wet, dry, and equilibrium brine math with salt-type and cure-salt support 73 Coffee Brew Method Calculator Coffee dose, water temp, grind size, and brew timing for every brewing method 66 Cooking Oil Selector Pick the right cooking oil for the temperature, flavor, and fat profile you want 58 Cooking Unit Converter Convert cooking measurements with ingredient-aware accuracy 185 Fermentation & Pickle Brine Calculator Lacto-fermentation salt brine math with food-safety bounds and pH expectations 67 Meat Roasting Calculator Get oven temps, cook times, and pull temps for any roast 199 Pizza Dough Calculator Calculate exact dough ingredients using baker's percentages 187 Pizza Value Calculator Compare pizza sizes by price per square inch to find the best deal 1,777 Recipe Nutrition Calculator Calculate total and per-serving nutrition from any recipe 218 Recipe Scaler Scale any recipe up or down with smart kitchen-friendly rounding. 183 Smart Cooking Temperature Converter Convert oven temperatures with convection, altitude, and oven-calibration adjustments 38 Sourdough Baker's Math Calculator Full baker's percentage workbench with preferments, bulk timing, and reverse mode 61 Sous Vide Calculator Heat-up and pasteurization times for sous vide using Baldwin tables 199 Yield & Trim Loss Calculator Edible yield percentages, true cost per edible pound, and how much raw to buy 63

401(k) Calculator Project your 401(k) growth with employer matching and compound returns. 202 Auto Loan Calculator Calculate monthly payments, total interest, and underwater risk 185 Budget Calculator Allocate your paycheck with the 50/30/20 rule in seconds. 203 CD Calculator Calculate CD earnings with compounding, penalties, and ladder strategies 167 Compound Interest Calculator Visualize how your money grows with the power of compound interest. 293 Cost of Living Calculator Compare the true cost of living between any two cities. 255 Cost of Smoking Calculator See the true financial cost of smoking -- and what you could have instead 197 Credit Card Payoff Calculator See your debt-free date and the true cost of minimum payments. 181 Debt Payoff Planner Build a payoff plan and see how fast you can become debt-free. 258 Down Payment Calculator Plan your down payment with PMI analysis and a savings timeline 160 Emergency Fund Calculator Calculate your ideal emergency fund and savings plan 155 FIRE Calculator Financial independence retire early planner 171 Gas Price Tracker Live gas prices by state, crude oil trends, and your personal cost impact 1,900 Inflation Calculator See what your money was worth then — or will be worth in the future. 298 Pay Raise vs Inflation Calculator See whether your raise actually beat inflation using live CPI data 141 Roth IRA Calculator Project Roth IRA growth and compare to Traditional IRA after taxes 175 Savings Goal Calculator Find out exactly how much to save each month to reach any financial goal 165 Student Loan Calculator Compare repayment plans and calculate payoff timeline 153 Treasury Bill Calculator Live Treasury yields with state tax advantage and CD comparison 340

AC Circuit Analyzer Impedance, resonance, Q factor, and Bode-plot filter design for RLC circuits 209 Beam Deflection & Load Calculator Maximum deflection, stress, shear, and safety factor for common beam profiles and materials 124 Boiling Point Calculator Find the boiling point of water at any altitude or pressure. 219 Density Calculator Calculate density, mass, or volume with 100+ material database. 176 Graphing Calculator Plot and explore mathematical functions interactively 194 Matrix Workbench Determinant, inverse, eigenvalues, RREF, LU decomposition, and Ax=b solver 129 Ohm's Law Calculator Calculate voltage, current, resistance, and power instantly. 182 PID Tuner & Step Response Simulator Suggested Kp, Ki, Kd gains via Ziegler-Nichols, Cohen-Coon, and IMC with a live step plot 138 Pipe Flow & Pressure Drop Calculator Darcy-Weisbach and Hazen-Williams pressure drop, Reynolds, friction factor, pump power 114 Projectile Motion Calculator Calculate trajectory, range, height, and flight time with animation. 242 Resistor Color Code Calculator Decode color bands to resistance values or encode values to colors. 174 Scientific Calculator Trig, algebra, primes, and base conversion in one powerful tool 179 Statistical Power Calculator Required sample size for t-tests, proportions, ANOVA, and chi-squared at any power and alpha 106 Statistics Calculator Descriptive stats, distributions, hypothesis testing, and regression 240 Tree Age Estimator Estimate tree age from trunk diameter using ISA growth factors 614 Unit-Aware Equation Solver Type an equation with units, get dimensional consistency and any-variable solution 99