# Metriova > Metriova is a free online calculator platform offering accurate tools for finance, business, health, and construction. All calculations run entirely client-side in the browser — no data is sent to servers. > For detailed methodology, formulas, and authoritative sources, see [llms-full.txt](https://www.metriova.net/llms-full.txt). ## Finance Calculators - [Mortgage Calculator](https://www.metriova.net/mortgage-calculator): Calculate monthly mortgage payments, amortization schedules, and total interest. Inputs: home price, down payment, loan term, interest rate, property tax, insurance. - [Compound Interest Calculator](https://www.metriova.net/compound-interest-calculator): Compute investment growth with compound interest. Supports initial investment, monthly contributions, and variable interest rates. - [Auto Loan Calculator](https://www.metriova.net/auto-loan-calculator): Estimate monthly car payments and total loan costs. Adjust loan amount, term, and APR. - [Retirement Calculator](https://www.metriova.net/retirement-calculator): Plan retirement savings, project future income, and calculate required monthly contributions. - [Credit Card Payoff Calculator](https://www.metriova.net/credit-card-payoff-calculator): Calculate debt payoff timelines. Compare minimum payments vs fixed payments and snowball/avalanche methods. - [Inflation Calculator](https://www.metriova.net/inflation-calculator): Compare purchasing power across years using historical CPI data. - [DCA Calculator](https://www.metriova.net/dca-calculator): Project dollar-cost averaging (DCA) returns based on monthly investment and expected annual return. - [FHA Loan Calculator](https://www.metriova.net/fha-loan-calculator): Estimate FHA mortgage payments including upfront and annual mortgage insurance premiums (MIP), taxes, and home insurance. - [VA Loan Calculator](https://www.metriova.net/va-loan-calculator): Calculate VA home loan payments including the funding fee, with no PMI for eligible veterans. - [401k Calculator](https://www.metriova.net/401k-calculator): Project your 401(k) retirement balance with employer matching, annual contributions, and compound growth. - [Rent vs Buy Calculator](https://www.metriova.net/rent-vs-buy-calculator): Compare renting vs buying a home over time, including the break-even year where buying wins. - [Refinance Calculator](https://www.metriova.net/refinance-calculator): Calculate mortgage refinance savings, monthly payment difference, and the break-even point for closing costs. - [Loan Calculator](https://www.metriova.net/loan-calculator): Estimate monthly loan payments, total interest, and amortization schedules for personal, student, and business loans with customizable terms. - [Sales Tax Calculator](https://www.metriova.net/sales-tax-calculator): Combined state and local sales tax with optional tip. - [Income Tax Calculator](https://www.metriova.net/income-tax-calculator): Estimate income tax with progressive brackets for the US, UK, Germany, and France (2025/26 rates). Includes standard deductions and take-home pay comparison. - [Net Worth Calculator](https://www.metriova.net/net-worth-calculator): Assets minus liabilities — your complete financial snapshot. - [Discount Calculator](https://www.metriova.net/discount-calculator): Stack multiple discounts and see the real savings rate. ## Business Calculators - [ROI Calculator](https://www.metriova.net/roi-calculator): Calculate Return on Investment and annualized ROI for comparing investments across different time periods. - [Break-Even Calculator](https://www.metriova.net/break-even-calculator): Find the exact sales volume where revenue meets costs. - [Etsy Fee Calculator](https://www.metriova.net/etsy-fee-calculator): Calculate Etsy listing fees, transaction fees, and payment processing charges. - [Amazon FBA Calculator](https://www.metriova.net/amazon-fba-calculator): Calculate Amazon FBA fees, referral fees, and fulfillment costs with profit margin and ROI. ## Health Calculators - [BMI Calculator](https://www.metriova.net/bmi-calculator): Calculate Body Mass Index from height and weight. Shows BMI categories and healthy weight ranges. - [BMR Calculator](https://www.metriova.net/bmr-calculator): Calculate Basal Metabolic Rate and daily calorie needs using the Mifflin-St Jeor equation. - [Heart Rate Calculator](https://www.metriova.net/heart-rate-calculator): Determine cardiovascular training zones based on age and resting heart rate. - [Water Intake Calculator](https://www.metriova.net/water-intake-calculator): Calculate recommended daily water intake based on body weight and activity level. - [Macro Calculator](https://www.metriova.net/macro-calculator): Calculate daily protein, carbohydrate, and fat targets based on fitness goals. - [Calorie Calculator](https://www.metriova.net/calorie-calculator): Plan your daily calorie intake (TDEE) based on BMR, activity level, and weight goals using the Mifflin-St Jeor equation. - [TDEE Calculator](https://www.metriova.net/tdee-calculator): Calculate your Total Daily Energy Expenditure with the Mifflin-St Jeor equation and get calorie targets for weight loss, maintenance, and gain. - [Body Fat Calculator](https://www.metriova.net/body-fat-calculator): US Navy method body composition and fitness category tool. - [Pregnancy Weight Gain Calculator](https://www.metriova.net/pregnancy-weight-gain-calculator): Trimester-by-trimester weight gain tracking with IOM guidelines. ## Construction Calculators - [Paint Calculator](https://www.metriova.net/paint-calculator): Estimate paint quantity needed for walls. Accounts for doors, windows, and number of coats. - [Tile Calculator](https://www.metriova.net/tile-calculator): Calculate tile quantity, boxes needed, and waste allowance for flooring projects. - [Concrete Calculator](https://www.metriova.net/concrete-calculator): Calculate concrete volume and estimate cement, sand, gravel, and water requirements. - [Brick Calculator](https://www.metriova.net/brick-calculator): Calculate brick count, mortar volume, and material requirements for masonry walls. - [Roofing Calculator](https://www.metriova.net/roofing-calculator): Calculate shingle bundles, underlayment rolls, and roofing squares needed. Adjust roof surface area with pitch for reliable material ordering. - [Roof Pitch Calculator](https://www.metriova.net/roof-pitch-calculator): Calculate roof pitch in ratio, degrees, and percentage. Find slope multiplier and surface area. - [Deck Material Calculator](https://www.metriova.net/deck-material-calculator): Estimate deck boards, joists, screws, and hidden fasteners needed for deck projects. - [Mulch Calculator](https://www.metriova.net/mulch-calculator): Garden mulch coverage calculator with bag count and cost. ## Math Calculators - [Percentage Calculator](https://www.metriova.net/percentage-calculator): Find percentages, percentage change, and what percent one number is of another. Includes step-by-step explanations for each result. - [Probability Calculator](https://www.metriova.net/probability-calculator): Single-event, compound, and expected value probability tool. - [Test Grade Calculator](https://www.metriova.net/test-grade-calculator): Calculate test grade percentage, letter grade, and GPA equivalent. ## Everyday Calculators - [Age Calculator](https://www.metriova.net/age-calculator): Find your exact age in years, months, days, weeks, and hours from any birth date. Includes a countdown to your next birthday. - [Tip Calculator](https://www.metriova.net/tip-calculator): Split tip amounts and bills among friends, with customizable tip percentages and rounding options. See total cost per person instantly. - [Tattoo Price Calculator](https://www.metriova.net/tattoo-price-calculator): Estimate tattoo cost based on size, complexity, and hourly rate. ## Information Pages - [About](https://www.metriova.net/about): Company mission, accuracy standards, and data sources. - [Use Cases](https://www.metriova.net/use-cases): Practical applications of Metriova calculators. - [All Categories](https://www.metriova.net/categories): Browse all calculator categories. - [Privacy Policy](https://www.metriova.net/privacy): All calculations are client-side. No data collection. - [Terms of Service](https://www.metriova.net/terms): Usage terms and disclaimers. ## Key Features - **Privacy-first**: All calculations run in the browser. No server-side processing. - **No registration**: All tools are free and require no sign-up. - **Multilingual**: Available in English, Spanish, French, German, Japanese, and Chinese. - **Authoritative data sources**: References Freddie Mac, SEC, WHO, FRED, ACI, BIA, and more. - **Structured data**: JSON-LD schema for FAQPage, HowTo, WebApplication, and BreadcrumbList.