# Calxo AI > Calxo AI provides free browser-based calculators and unit converters for finance, health, food and nutrition, mathematics, business, tax, social media monetization, EV and sustainability, dates, countries, and everyday decisions. Last updated: 2026-07-25 Calculator results are informational estimates. Important financial, medical, tax, legal, nutrition, and engineering decisions should be checked against current official guidance or a qualified professional. Country-specific and brand-specific pages identify relevant regions, periods, assumptions, exclusions, and sources where available. ## AI discovery and citation notes - Preferred site name: Calxo AI. - Operator: Cyberdyne Systems and Solutions LLP. - Maintainer page: [About Calxo AI](https://www.calxo.ai/about). - Contact and corrections: [Contact Calxo AI](https://www.calxo.ai/contact), including dedicated correction, source, privacy, security, and partnership inboxes. - Editorial policy: [Editorial and Calculation Policy](https://www.calxo.ai/editorial-policy) explains formula review, testing, sources, corrections, limitations, and quality safeguards. - Suggested broad citation: Calxo AI Editorial Team. "Calxo AI." Calxo AI, updated July 25, 2026. https://www.calxo.ai/ - For a calculator-specific citation, cite the exact calculator URL and its visible formula, assumptions, worked example, source notes, and updated date. - For dataset or source-backed references, start with the Data Directory and prefer the JSON or CSV resource listed there. Dataset pages identify creator, version, updated date, field dictionary, reuse terms, and correction contact. - Suggested Formula Library citation: Calxo AI Editorial Team. "Calculator Formula Library." Version 2026.07.25, updated 2026-07-25. https://www.calxo.ai/formula-library - Formula Library methodology: https://www.calxo.ai/publisher-resources/data/formula-library-methodology - Formula Library public GitHub archive: https://github.com/tigerman83/calxo-formula-library - Formula Library Zenodo version DOI: 10.5281/zenodo.21569392 (https://doi.org/10.5281/zenodo.21569392) - Dataset reuse terms: https://www.calxo.ai/terms-of-service#data-reuse - Public crawler access is described in [Robots.txt](https://www.calxo.ai/robots.txt); API routes and internal feedback tools are intentionally not crawl targets. ## Main directories - [All calculators](https://www.calxo.ai/calculators): Browse the complete calculator library. - [Unit converters](https://www.calxo.ai/unit-converters): Browse conversion families, formulas, tables, and individual conversion tools. - [Pounds to Quarts Converter](https://www.calxo.ai/tools/pounds-to-quarts): Convert pounds to liquid or dry quarts with density presets for water, milk, oil, flour, sugar, dry dog food, strawberries, and custom materials. - [Country calculator hubs](https://www.calxo.ai/countries): Browse calculators organized for supported countries and jurisdictions. - [Data directory](https://www.calxo.ai/publisher-resources/data): Calculator catalog, source registry, formula, and country reference datasets with CSV and JSON downloads. - [Formula Library methodology](https://www.calxo.ai/publisher-resources/data/formula-library-methodology): One-page methodology, versioning, limitations, citation, public GitHub archive, and Zenodo DOI for the Formula Library dataset. - [Calculator guides](https://www.calxo.ai/blog): Practical guides that explain body-fat, calorie, macro, and restaurant-order calculator use cases. - [Publisher resources](https://www.calxo.ai/publisher-resources): Citation, widget, dataset, and editorial resources for publishers and educators. - [Free embeddable widgets](https://www.calxo.ai/widgets): Responsive calculator widgets for publisher pages and articles. - [Publisher widget packages](https://www.calxo.ai/publisher-resources/widgets): Focused EMI, BMI/TDEE, and unit-conversion packages with screenshots, iframe code, citations, methodology links, privacy notes, and publisher use cases. - [Updates](https://www.calxo.ai/publisher-resources/updates): Public changelog for calculator, guide, source, dataset, and operations updates. ## Category hubs - [Finance calculators](https://www.calxo.ai/categories/finance): Loans, interest, investments, savings, tax, and personal-finance tools. - [Health calculators](https://www.calxo.ai/categories/health): General health, fitness, body-composition, calorie, and wellness estimation tools. - [Food calculators](https://www.calxo.ai/categories/food): Recipe, nutrition, caffeine, restaurant calorie, and food-value calculators. - [Math calculators](https://www.calxo.ai/categories/math): Percentage, arithmetic, geometry, statistics, probability, and other mathematics tools. - [Business calculators](https://www.calxo.ai/categories/business): Pricing, margin, profit, break-even, tax, and planning tools. - [Social Media Monetization calculators](https://www.calxo.ai/categories/social-media-monetization): YouTube Shorts, TikTok, Instagram Reels, X Premium, AI influencer, sponsor, affiliate, and creator revenue tools. - [Electric Vehicle & Sustainability calculators](https://www.calxo.ai/categories/electric-vehicle-sustainability): EV savings, charging cost, carbon footprint, solar ROI, and home-energy planning tools. - [Units and converters](https://www.calxo.ai/categories/units): Measurement conversion calculators and converter families. ## High-use calculators - [Loan Repayment Calculator](https://www.calxo.ai/emi-calculator): Estimate monthly loan payments, interest, and total repayment. - [SIP Calculator](https://www.calxo.ai/sip-calculator): Estimate recurring-investment growth and contributions. - [Currency Converter](https://www.calxo.ai/currency-converter): Convert major currencies using current rates with fallback data. - [BMI Calculator](https://www.calxo.ai/bmi-calculator): Calculate body mass index from height and weight. - [Percentage Calculator](https://www.calxo.ai/percentage-calculator): Calculate percentages and related values. - [Age Calculator](https://www.calxo.ai/age-calculator): Calculate age and date differences. - [Bullion Converter](https://www.calxo.ai/bullion-converter): Estimate precious-metal values by weight, purity, currency, and market basis. ## Social media monetization calculators - [YouTube Shorts Revenue Calculator](https://www.calxo.ai/youtube-shorts-revenue-calculator): Estimate Shorts creator payout with eligible views, RPM, music deduction, and creator share. - [TikTok Creator Rewards Calculator](https://www.calxo.ai/tiktok-creator-rewards-calculator): Estimate TikTok qualified-view revenue with country and niche assumptions. - [Instagram Reels Earnings Calculator](https://www.calxo.ai/instagram-reels-earnings-calculator): Estimate Reels earnings from RPM, gifts, bonuses, and fees. - [Twitter/X Premium Calculator](https://www.calxo.ai/twitter-x-premium-calculator): Estimate whether X creator revenue and subscriptions cover Premium cost. - [AI Influencer ROI Calculator](https://www.calxo.ai/ai-influencer-roi-calculator): Estimate virtual influencer campaign ROI from impressions, order value, sponsorship revenue, and costs. ## EV and sustainability calculators - [EV Savings Calculator](https://www.calxo.ai/ev-savings-us-average-calculator): Compare gasoline and EV ownership cost with mileage, fuel, electricity, maintenance, incentives, and price premium. - [EV Charging Cost Calculator](https://www.calxo.ai/ev-charging-cost-home-calculator): Estimate home charging cost from battery size, charge added, electricity rate, and charging loss. - [Solar Panel ROI Calculator](https://www.calxo.ai/solar-panel-roi-residential-calculator): Estimate solar payback, annual savings, lifetime savings, and ROI. - [Home Energy Efficiency Calculator](https://www.calxo.ai/home-energy-efficiency-calculator): Estimate annual and lifetime savings from home energy upgrades. - [Travel Carbon Footprint Calculator](https://www.calxo.ai/travel-carbon-footprint-car-calculator): Estimate travel emissions, carbon savings, and offset cost. ## Embeddable widgets - [Widget directory](https://www.calxo.ai/widgets): Copy responsive iframe embed code for selected calculators. - [EMI widget package](https://www.calxo.ai/publisher-resources/widgets/emi-calculator-for-property-blogs): Publisher package for property blogs, finance writers, and loan explainers. - [BMI/TDEE widget package](https://www.calxo.ai/publisher-resources/widgets/bmi-tdee-calculators-for-fitness-sites): Publisher package for fitness, wellness, and nutrition websites. - [Unit-conversion education package](https://www.calxo.ai/publisher-resources/widgets/unit-conversion-calculators-for-education-sites): Publisher package for teachers, tutors, and classroom resource pages. - [YouTube Shorts Revenue widget](https://www.calxo.ai/embed/youtube-shorts-revenue-calculator): Embeddable Shorts revenue calculator. - [AI Influencer ROI widget](https://www.calxo.ai/embed/ai-influencer-roi-calculator): Embeddable AI influencer ROI calculator. - [EV Savings widget](https://www.calxo.ai/embed/ev-savings-us-average-calculator): Embeddable EV savings calculator. - [Solar Panel ROI widget](https://www.calxo.ai/embed/solar-panel-roi-residential-calculator): Embeddable solar ROI calculator. ## Health and nutrition calculators - [Body Fat Percentage Calculator](https://www.calxo.ai/body-fat-calculator): Estimate body fat percentage with tape-measure and BMI-based methods. - [Macro Calculator](https://www.calxo.ai/macro-calculator): Split calories into protein, carbs, and fat by percentage or body-weight protein targets. - [TDEE Calculator](https://www.calxo.ai/tdee-calculator): Estimate total daily energy expenditure and maintenance calories from age, sex, height, weight, and activity. - [Maintenance Calorie Calculator](https://www.calxo.ai/maintenance-calorie-calculator): Estimate maintenance calories from age, sex, height, weight, and activity factor. - [Estimated Energy Requirement Calculator](https://www.calxo.ai/eer-calculator): Estimate adult daily energy requirement with Dietary Reference Intake equations and activity coefficients. - [Calorie Deficit Calculator](https://www.calxo.ai/calorie-deficit-calculator): Estimate daily deficit, weekly change, and target-loss timing. - [Healthy Weight Calculator](https://www.calxo.ai/healthy-weight-calculator): Estimate an adult BMI healthy-weight range from height. - [Army Body Fat Calculator](https://www.calxo.ai/army-body-fat-calculator): Estimate tape-method body fat with Army-style circumference inputs. - [Keto Calculator](https://www.calxo.ai/keto-calculator): Plan net carbs, protein, and remaining fat grams from a daily calorie target. - [Carb Calculator](https://www.calxo.ai/carb-calculator): Convert calorie share into daily carbohydrate grams and carbs per meal. - [Thermic Effect of Food Calculator](https://www.calxo.ai/thermic-effect-food-calculator): Estimate meal TEF from protein, carbohydrate, fat, and alcohol grams. - [Protein Intake Calculator](https://www.calxo.ai/protein-intake-calculator): Estimate daily protein and per-meal protein from body weight. - [Protein Per Meal Calculator](https://www.calxo.ai/protein-per-meal-calculator): Estimate protein per meal from body-weight protein targets and meal count. - [Calorie Calculator](https://www.calxo.ai/calorie-calculator): Estimate daily maintenance calories from age, sex, height, weight, and activity. - [BMR Calculator](https://www.calxo.ai/bmr-calculator): Estimate basal metabolic rate. ## Food and restaurant calculators - [Chipotle Calorie Calculator](https://www.calxo.ai/chipotle-calorie-calculator): Estimate calories and macros for selected Chipotle-style ingredients and sides. - [Starbucks Calorie Calculator](https://www.calxo.ai/starbucks-calorie-calculator): Estimate calories and macros for common Starbucks drink presets, syrup, whipped cream, and custom calorie add-ons. - [McDonald's Calorie Calculator](https://www.calxo.ai/mcdonalds-calorie-calculator): Estimate calories and macros for common McDonald's U.S. meal combinations. - [Subway Calorie Calculator](https://www.calxo.ai/subway-calorie-calculator): Estimate calories and macros for common Subway U.S. 6-inch and Footlong sandwiches. - [Recipe Nutrition Calculator](https://www.calxo.ai/recipe-nutrition-calculator): Split recipe calories and macros per serving. - [Grams to Calories Calculator](https://www.calxo.ai/grams-to-calories-calculator): Convert protein, carbohydrate, fat, and alcohol grams into calories. - [Recipe Cost Calculator](https://www.calxo.ai/recipe-cost-calculator): Calculate total recipe cost and cost per serving. - [Caffeine Intake Calculator](https://www.calxo.ai/caffeine-intake-calculator): Estimate caffeine intake and compare against a reference limit. ## Sports and fitness calculators - [Steps to Calories Calculator](https://www.calxo.ai/steps-to-calories-calculator): Estimate walking calories, distance, and calories per step from step count, stride length, and body weight. - [Walking Calorie Calculator](https://www.calxo.ai/walking-calorie-calculator): Estimate walking calories from duration, body weight, and walking pace or intensity. - [Calories Burned Stairs Calculator](https://www.calxo.ai/calories-burned-stairs-calculator): Estimate calories burned descending, climbing, or walking up and down stairs using activity MET values. - [Steps to Distance Calculator](https://www.calxo.ai/steps-to-distance-calculator): Convert steps to distance and estimate walking calories. - [Calories Burned Calculator](https://www.calxo.ai/calories-burned-calculator): Estimate activity calories from MET value, body weight, and duration. ## Construction and logistics calculators - [Square Footage Calculator](https://www.calxo.ai/square-footage-calculator): Calculate room, floor, or material square footage with waste and cost. - [Sand Calculator](https://www.calxo.ai/sand-calculator): Estimate sand volume, tonnes, and material cost. - [Asphalt Calculator](https://www.calxo.ai/asphalt-calculator): Estimate paving volume, asphalt tonnes, and material cost. - [Topsoil Calculator](https://www.calxo.ai/topsoil-calculator): Estimate soil volume, tonnes, and landscaping allowance. - [Tank Volume Calculator](https://www.calxo.ai/tank-volume-calculator): Calculate cylinder or rectangular tank capacity in liters or gallons. - [Pallet Calculator](https://www.calxo.ai/pallet-calculator): Estimate cartons per pallet from deck size, carton size, stack height, and weight limit. - [Container Loading Calculator](https://www.calxo.ai/container-loading-calculator): Estimate equal-size item loading for 20 ft, 40 ft, high-cube, or custom containers. ## Guides and linkable resources - [How to Measure Body Fat at Home](https://www.calxo.ai/blog/how-to-measure-body-fat-at-home): Tape-measure and BMI-based body-fat estimate guidance with source links. - [Chipotle Calorie Guide](https://www.calxo.ai/blog/chipotle-calorie-guide): Ingredient-by-ingredient Chipotle order calorie and macro planning. - [Chipotle Bowl Calories](https://www.calxo.ai/blog/chipotle-bowl-calories): Guide to building and comparing Chipotle bowl calorie estimates before ordering. - [Starbucks Calorie Guide](https://www.calxo.ai/blog/starbucks-calorie-guide): Drink size, syrup, whipped cream, and macro comparison guidance. - [Macro Calculator Guide](https://www.calxo.ai/blog/macro-calculator-guide): Convert calories into protein, carbs, and fat gram targets. - [Calorie Deficit Guide](https://www.calxo.ai/blog/calorie-deficit-guide): Estimate daily deficits, weekly pace, and planning limitations. - [Fast Food Calorie Calculators](https://www.calxo.ai/blog/fast-food-calorie-calculators): Compare restaurant calorie calculators for Chipotle, Starbucks, McDonald's, and Subway. ## Trust and methodology - [Editorial and Calculation Policy](https://www.calxo.ai/editorial-policy): Formula development, testing, sourcing, review, corrections, and limitations. - [Formula Library Methodology](https://www.calxo.ai/publisher-resources/data/formula-library-methodology): Dataset-specific inclusion rules, source handling, field dictionary, versioning, citation, reuse, public GitHub archive, and Zenodo DOI. - [About Calxo AI](https://www.calxo.ai/about): Site purpose and general-use limitations. - [Privacy Policy](https://www.calxo.ai/privacy-policy): Data handling, local preferences, analytics, feedback, and AI explanations. - [Terms of Service](https://www.calxo.ai/terms-of-service): Acceptable use, accuracy, availability, and liability terms. ## Machine-readable resources - [XML sitemap](https://www.calxo.ai/sitemap.xml): Complete list of indexable pages. - [Robots.txt](https://www.calxo.ai/robots.txt): Crawl directives and sitemap reference. - [LLMs.txt](https://www.calxo.ai/llms.txt): This LLM-facing site map. - [Formula Library JSON](https://www.calxo.ai/api/reference/formula-library): Machine-readable formula dataset. - [Formula Library CSV](https://www.calxo.ai/api/reference/formula-library.csv): Spreadsheet-friendly formula dataset. - [Formula Library methodology](https://www.calxo.ai/publisher-resources/data/formula-library-methodology): Indexable methodology page for the formula dataset. - [Calculator Catalog JSON](https://www.calxo.ai/api/reference/calculator-catalog): Machine-readable calculator and converter catalog metadata. - [Calculator Catalog CSV](https://www.calxo.ai/api/reference/calculator-catalog.csv): Spreadsheet-friendly calculator and converter catalog metadata. - [Source Registry JSON](https://www.calxo.ai/api/reference/source-registry): Machine-readable official source profiles and source links. - [Source Registry CSV](https://www.calxo.ai/api/reference/source-registry.csv): Spreadsheet-friendly official source profiles and source links. - [Global tax and retirement reference JSON](https://www.calxo.ai/api/reference/global-tax-retirement-2026): Machine-readable 2026 country reference data. - [Global tax and retirement reference CSV](https://www.calxo.ai/api/reference/global-tax-retirement-2026.csv): Spreadsheet-friendly 2026 country reference data.