Free Online Tools & Calculators

Board Foot Calculator Board feet, weight, cost, and species data for woodworkers 132 Closing Cost Calculator Estimate your total closing costs before you sign 150 Concrete Calculator Calculate concrete volume for slabs, footings, columns, and more 124 Decking Calculator Every material for your deck build, from boards to footings 143 Drywall Calculator Calculate sheets, tape, mud, screws, and corner bead for any room 126 Fence Calculator Calculate posts, rails, pickets, and concrete for any fence project 103 Flooring Calculator Estimate materials & cost for any flooring project 110 Gas vs Electric Appliance Calculator Real state energy prices for gas vs electric appliance cost comparison 72 HELOC Payment Simulator See the payment shock before you sign: draw period vs repayment modeling 70 Home Affordability Calculator Find out how much house you can actually afford 145 Home Equity Calculator See how much equity you've built and your borrowing power 121 Home Equity Loan Comparison Compare HELOC, cash-out refi, and personal loans side by side 124 Home Insurance Coverage Calculator Calculate your true replacement cost and coverage needs 103 Homebuyer Readiness Score Score your readiness to buy across five key pillars 93 Investment Property Analyzer Analyze rental deals with BRRRR and buy-hold models 95 Landscape Material Calculator Cubic yards, weight, and bag count for any landscaping material 111 Mortgage Payment Calculator Calculate your monthly mortgage payment with taxes and insurance 210 Mortgage Refinance Calculator Know your break-even date before you refinance your mortgage 66 Moving Cost Estimator Get a realistic estimate for your upcoming move — local or cross-country 112 Paint Calculator Calculate exactly how much paint you need for any room 98 Property Tax Estimator Estimate your annual property taxes and monthly escrow impact 106 Renovation ROI Calculator Find out which home improvements actually pay for themselves 123 Rent vs. Buy Calculator Find out whether renting or buying saves you more over time 118 Rental Profit Calculator Find out if your short-term rental will actually make money after all expenses 103 Roofing Calculator Calculate squares, bundles & materials by pitch 95 Solar Savings Calculator See if solar panels are worth it for your home and how fast they pay for themselves 126 Stair Calculator Design code-compliant stairs with the right rise, run, and materials 89 Tile Calculator Exact tile, grout, and adhesive quantities for any layout pattern 97 Tree Canopy Shade Calculator Shadow length and shaded area by season and latitude 318 Tree Pruning Calendar Species-aware pruning windows for 40+ trees 70 Tree Watering Calculator Weekly gallon targets by trunk size, age & season 74 Wallpaper Calculator Get the exact number of wallpaper rolls with pattern repeat math 91

BAC Calculator Estimate your blood alcohol content based on drinks, weight, and time 139 Biological Age Calculator Discover your body's real age based on your lifestyle 179 Blood Pressure Calculator Understand your blood pressure reading with clinical context 117 BMI Calculator Calculate your Body Mass Index and understand what it means 185 Body Fat Calculator Estimate your body fat percentage using Navy, circumference, or skinfold methods 137 Caffeine Calculator Calculate your safe daily caffeine limit and track intake 110 Calories Burned Calculator Calories burned by activity & duration 131 Chocolate Toxicity Calculator for Dogs Find out if the chocolate your dog ate is dangerous -- fast 103 Dog Food Calculator Precise daily feeding portions based on your dog's needs 141 Dog Years Calculator Convert your dog's age to human years using modern veterinary science 119 Due Date Calculator Calculate your estimated due date and track key pregnancy milestones 123 Fasting Calculator Plan your intermittent fasting schedule and see when your body enters each metabolic zone 145 Keto Calculator Calculate your personalized keto macro targets for fat, protein, and carbs 88 Life Expectancy Calculator See how your lifestyle choices impact your projected lifespan 212 Macro & Calorie Calculator Find your daily calories and macros based on your body and goals 213 Nutrition Label Analyzer Instant health grade and nutrition breakdown for any packaged food 67 One-Rep Max Calculator Estimate your one-rep max and plan your training percentages 113 Pace & Race Time Calculator Find your pace, finish time, or distance — with splits for every mile 127 Pregnancy Weight Gain Calculator Track recommended weight gain week by week through pregnancy 93 Protein Per Dollar Calculator Rank any food by protein grams per dollar with live USDA data 190 Recovery & Readiness Score Get a 0-100 readiness score to know when to push and when to rest 109 Sleep Cycle Calculator Find the best times to sleep and wake based on your sleep cycles 118 Steps to Distance Calculator Convert your step count into miles, kilometers, and calories burned 103 Supplement Stack Analyzer Check your supplement stack for interactions, overlaps, and optimal timing 118 TDEE Calculator Find your daily calorie target based on your body and activity level 157 Training Plan Builder Generate a progressive multi-week training plan for any goal 112 VO2 Max Calculator Estimate your VO2 max and cardio fitness age with four test protocols 117 Water Intake Calculator Personalized daily hydration guide 127

1099 vs W-2 Calculator Compare your real take-home pay as a contractor versus an employee 149 AdSense Revenue Calculator Estimate AdSense revenue by traffic, niche, and ad density 132 Break-Even Calculator Find out exactly how many units you need to sell before you profit 186 Business Valuation Calculator Estimate your business value using four valuation methods 140 Cash Flow Forecaster Build a 12-month rolling cash flow model with danger zone alerts 115 Client Profitability Scorecard Score up to 8 clients by profitability, effort, and relationship quality 106 Commission Calculator Calculate sales commission for flat, tiered, and accelerator structures 136 CTR Calculator Calculate Click-Through Rate and compare it to industry benchmarks 104 Employee Cost Calculator Calculate the true total cost of hiring an employee beyond salary 275 Freelance Rate Calculator Find your ideal hourly rate based on your income goals 189 Influencer ROI Calculator Measure the true ROI of your influencer marketing campaigns 97 Instagram Engagement Calculator Calculate engagement rate & compare benchmarks 117 Invoice Calculator Build line items, apply discounts and tax, and see your invoice total 126 Margin & Markup Calculator Convert between margin and markup instantly — and find your ideal price 138 Meeting Cost Calculator Watch your meeting cost tick up in real time 107 Project Estimator Estimate project timelines and costs with confidence 103 Proposal Win-Rate & Pricing Analyzer Find your sweet spot pricing and improve your proposal win rate 129 Quarterly Tax Estimator Calculate your estimated quarterly tax payments and avoid penalties 112 ROAS Calculator Calculate your Return on Ad Spend and see if your campaigns are profitable 94 SaaS Pricing Calculator Model your SaaS pricing tiers and project recurring revenue 132 Salary & Hourly Converter Convert between salary and hourly rate — see what you really earn 137 Salary Percentile Calculator Government wage data to know if you're paid fairly by occupation and state 387 Startup Runway Calculator See how long your cash lasts and when you need to raise or profit 138 TikTok Engagement Rate Calculator Measure TikTok video performance against niche benchmarks 114 YouTube Earnings Calculator Estimate YouTube ad revenue by views, niche, and audience geography 133

Age & Date Calculator Calculate exact age, date differences, and countdowns 155 Car Depreciation Calculator See how your car loses value year by year with a 10-year projection 145 Electrical Power Calculator Calculate watts, kVA, HP, motor starting, and amperage 124 Electricity Cost Calculator See how much any appliance or device costs you to run. 154 EV vs Gas Cost Calculator Real state energy prices, tax credits, and 5-year ownership cost 75 Fuel Cost Calculator Calculate your trip fuel cost and compare vehicles side by side 148 Generator Wattage Calculator Size your generator by checking off what you need to power 113 Loan Comparison Engine Compare up to 4 loans side by side with amortization curves 105 MPG Calculator Calculate fuel economy and trip costs 121 Net Worth Tracker & Analyzer Calculate your net worth with percentile ranking by age 160 Percentage Calculator Solve any percentage problem instantly — three modes, one tool 164 Real Hourly Wage Calculator Discover what you really earn per hour after all work costs 93 Retirement Readiness Calculator Find out if you will have enough to retire comfortably 131 Sales Tax Calculator Calculate sales tax for any US state with reverse tax mode 142 Subscription Audit Calculator Track all your subscriptions and find what to cut 136 Subscription Tracker Calculator Reveal the true cost of subscription creep 145 Tip Calculator Calculate the right tip and split the bill easily. 244 Travel Budget Calculator Live exchange rates for multi-destination trip budgeting 79 Unit Converter Convert between any units of measurement instantly 154

AI Content Detector Analyze text to estimate whether it was written by AI or a human 137 AI Grammar Checker Check grammar, punctuation, spelling, and style instantly 158 Bio & About Page Generator Generate 5 professional bio formats instantly as you type 117 Brand Voice & Tone Analyzer Analyze your writing style across six voice dimensions 101 Case Converter Convert text between 10 naming conventions in one click 124 Cold Email & Outreach Scorer Get a brutally honest 0-100 score on your cold emails 89 Content Brief Builder Generate structured SEO content briefs with outlines and titles 99 Email Subject Line Tester Score your email subject lines for open rates before you hit send. 114 Headline Analyzer Score your headlines for clicks, engagement, and emotional impact 161 Invisible Character Remover Detect and remove hidden Unicode characters from text 141 Jargon Ipsum Generator Generate hilarious profession-themed placeholder text 118 Markdown Editor Write, preview, and convert Markdown with live rendering. 115 Meta Tag Analyzer Generate and preview meta tags for Google and social media 109 Reading Level Analyzer Analyze your text's reading level with multiple scoring methods 193 Schema Markup Generator Generate JSON-LD structured data for Google rich results 100 SEO Content Analyzer Optimize your content for search engines with actionable scoring. 117 Social Media Optimizer Optimize your posts for every platform with character counts and scoring. 120 Text Diff Tool Compare two texts side by side and see every difference highlighted. 118 Word & Character Counter Count words, characters, and reading time as you type 176

AI Token Calculator Count tokens and estimate API costs for any AI model. 124 Color Converter & Palette Generator Convert colors between formats and generate harmonious palettes 140 Cron Expression Builder Build and decode cron expressions with a visual schedule editor. 129 CSS Generator Generate beautiful CSS gradients, shadows, and glassmorphism effects. 140 Design Token & Color System Generator Generate complete design systems from a single brand color 121 DNS Lookup Query and inspect all DNS records for any domain instantly 102 Encoding Toolkit Encode, decode, and convert between Base64, URL, HTML, and more. 113 Hash Generator Generate MD5, SHA-1, SHA-256, and SHA-512 hashes instantly 111 HTML Cleaner & Formatter Clean messy HTML from Word, Google Docs, and CMS editors 110 HTTP Security Header Grader Audit your HTTP security headers with A-F grades per category 96 IP Subnet Calculator Calculate subnet details from any IP/CIDR notation 88 JSON Formatter & Validator Format, validate, and explore JSON with instant error detection 146 JWT Decoder Decode, inspect, and validate JSON Web Tokens instantly. 108 Link Building Cost Calculator Estimate link building costs by DA, niche, and link type 112 Meta Tag Generator Generate SEO meta tags, Open Graph, and Twitter Cards with live previews 86 Password Generator Generate cryptographically secure passwords with strength analysis 93 QR Code Generator Generate customizable QR codes for URLs, WiFi, contacts, and more 94 Regex Tester Build and test regular expressions with live match highlighting 129 Robots.txt Generator Build and validate robots.txt files visually 100 SQL Formatter Format and beautify SQL queries instantly 86 SQL Query Builder & Explainer Build SQL visually or paste queries for plain-English explanations 106 UUID Generator Generate, validate, and format UUIDs instantly 106 XML Sitemap Generator Generate valid XML sitemaps with URL validation and smart splitting 112

Air Fryer Converter Convert oven recipes to air fryer settings instantly. 129 Baking Substitution Finder Find ingredient swaps with exact ratios and effectiveness ratings 109 BBQ & Smoking Calculator Estimate cook times, temps, and servings for any smoked meat 119 Cooking Unit Converter Convert cooking measurements with ingredient-aware accuracy 119 Meat Roasting Calculator Get oven temps, cook times, and pull temps for any roast 135 Pizza Dough Calculator Calculate exact dough ingredients using baker's percentages 107 Pizza Value Calculator Compare pizza sizes by price per square inch to find the best deal 149 Recipe Nutrition Calculator Calculate total and per-serving nutrition from any recipe 109 Recipe Scaler Scale any recipe up or down with smart kitchen-friendly rounding. 114 Sous Vide Calculator Heat-up and pasteurization times for sous vide using Baldwin tables 42

401(k) Calculator Project your 401(k) growth with employer matching and compound returns. 141 Auto Loan Calculator Calculate monthly payments, total interest, and underwater risk 124 Budget Calculator Allocate your paycheck with the 50/30/20 rule in seconds. 144 CD Calculator Calculate CD earnings with compounding, penalties, and ladder strategies 105 Compound Interest Calculator Visualize how your money grows with the power of compound interest. 207 Cost of Living Calculator Compare the true cost of living between any two cities. 173 Cost of Smoking Calculator See the true financial cost of smoking -- and what you could have instead 106 Credit Card Payoff Calculator See your debt-free date and the true cost of minimum payments. 117 Debt Payoff Planner Build a payoff plan and see how fast you can become debt-free. 172 Down Payment Calculator Plan your down payment with PMI analysis and a savings timeline 99 Emergency Fund Calculator Calculate your ideal emergency fund and savings plan 91 FIRE Calculator Financial independence retire early planner 108 Gas Price Tracker Live gas prices by state, crude oil trends, and your personal cost impact 829 Inflation Calculator See what your money was worth then — or will be worth in the future. 213 Pay Raise vs Inflation Calculator See whether your raise actually beat inflation using live CPI data 72 Roth IRA Calculator Project Roth IRA growth and compare to Traditional IRA after taxes 118 Savings Goal Calculator Find out exactly how much to save each month to reach any financial goal 92 Student Loan Calculator Compare repayment plans and calculate payoff timeline 97 Treasury Bill Calculator Live Treasury yields with state tax advantage and CD comparison 229

AC Circuit Analyzer Impedance, resonance, Q factor, and Bode-plot filter design for RLC circuits 60 Beam Deflection & Load Calculator Maximum deflection, stress, shear, and safety factor for common beam profiles and materials 47 Boiling Point Calculator Find the boiling point of water at any altitude or pressure. 143 Density Calculator Calculate density, mass, or volume with 100+ material database. 112 Graphing Calculator Plot and explore mathematical functions interactively 137 Matrix Workbench Determinant, inverse, eigenvalues, RREF, LU decomposition, and Ax=b solver 41 Ohm's Law Calculator Calculate voltage, current, resistance, and power instantly. 128 PID Tuner & Step Response Simulator Suggested Kp, Ki, Kd gains via Ziegler-Nichols, Cohen-Coon, and IMC with a live step plot 40 Pipe Flow & Pressure Drop Calculator Darcy-Weisbach and Hazen-Williams pressure drop, Reynolds, friction factor, pump power 40 Projectile Motion Calculator Calculate trajectory, range, height, and flight time with animation. 173 Resistor Color Code Calculator Decode color bands to resistance values or encode values to colors. 111 Scientific Calculator Trig, algebra, primes, and base conversion in one powerful tool 115 Statistical Power Calculator Required sample size for t-tests, proportions, ANOVA, and chi-squared at any power and alpha 38 Statistics Calculator Descriptive stats, distributions, hypothesis testing, and regression 156 Tree Age Estimator Estimate tree age from trunk diameter using ISA growth factors 278 Unit-Aware Equation Solver Type an equation with units, get dimensional consistency and any-variable solution 34