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Calculate anything, instantly.
Numeros gives you fast, accurate calculators for finance, health, math and everyday life.
Browse by category
Twelve focused collections covering everything from mortgages to physics.
Financial
Loans, mortgages, interest, tax, savings
- Mortgage Calculator
- UK Stamp Duty Calculator (SDLT)
- Loan Calculator
- Auto Loan Calculator
- Car Lease Payment Calculator
- Car Depreciation Calculator
- Lease vs. Buy Auto Calculator
- Compound Interest Calculator
- EMI Calculator
- SIP Calculator
- PF (EPF) Calculator
- NPS Calculator
- CRA Payroll Deductions Calculator
- RRSP Contribution Room Calculator
- TFSA Contribution Room Calculator
- Simple Interest Calculator
- Retirement Calculator
- Superannuation Calculator (Australia)
- HECS-HELP Repayment Calculator
- Life Insurance Needs Calculator (DIME Method)
- Disability Insurance Needs Calculator
- ACA Health Insurance Subsidy Calculator
- Investment Calculator
- Income Tax Calculator
- No Tax on Overtime Calculator
- No Tax on Tips Calculator
- Senior Bonus Deduction Calculator
- Car Loan Interest Deduction Calculator
- Salary Calculator
- Savings Calculator
- Credit Card Payoff Calculator
- Debt Payoff Calculator (Snowball Method)
- Debt Consolidation Calculator
- Chapter 7 Means Test Calculator
- Student Loan Calculator
- Rent vs. Buy Calculator
- Net Worth Calculator
- CD Calculator
- Refinance Calculator
- Home Affordability Calculator
- Debt-to-Income Ratio Calculator
- Budget Calculator
- Emergency Fund Calculator
- Inflation Calculator
- Rule of 72 Calculator
- VAT Calculator
- UK Take-Home Pay Calculator
- German Social Security Calculator
- Grunderwerbsteuer Calculator (Germany & Austria)
- Swiss Social Security Calculator
- Austria Take-Home Pay Calculator
- Amortization Schedule Calculator
- 401(k) Calculator
- RMD Calculator
- Down Payment Calculator
- Mortgage Payoff Calculator
- Biweekly Mortgage Payment Calculator
- Interest-Only Mortgage Calculator
- APR Calculator
- Payday Loan Cost Calculator
- Gold Calculator
- VA Disability Calculator
- Interest Rate Calculator
- FIRE Calculator
- Debt Avalanche Calculator
- Home Equity Calculator
- Real Estate ROI Calculator
- Rent Increase Calculator
- Zakat Calculator
- UAE Gratuity Calculator
- RERA Rent Increase Calculator
- IBAN Validator
- Annuity Calculator
- Time Value of Money (TVM) Calculator
- Structured Settlement Present Value Calculator
- Dollar Cost Averaging Calculator
- Position Sizing Calculator
- Forex Pip Value Calculator
- Roth IRA Calculator
- Roth IRA Conversion Calculator
- Construction Loan Calculator
- HELOC Calculator
- Cash-Out Refinance Calculator
- Dividend Yield Calculator
- DRIP Calculator
- CAPM Calculator
- Capital Gains Tax Calculator
- Impermanent Loss Calculator
- 1031 Exchange Boot Calculator
- DSCR Loan Calculator
- NIIT Calculator
- Crypto Profit Calculator
- Closing Cost Calculator
- PMI Calculator
- FHA Mortgage Calculator (with MIP)
- Mortgage Points Break-Even Calculator
- APY Calculator
- BNPL True Cost Calculator
- HSA Calculator
- Coast FIRE Calculator
- PITI Calculator
Health
BMI, calories, body fat, pregnancy
- BMI Calculator
- Calorie Calculator
- Body Fat Calculator
- BMR Calculator
- Ideal Weight Calculator
- Pregnancy Due Date Calculator
- Conception Date Calculator
- Ovulation Calculator
- Macro Calculator
- Water Intake Calculator
- Blood Pressure Calculator
- QTc Calculator
- Cholesterol Calculator
- Blood Sugar Calculator
- Hemoglobin Calculator
- Body Temperature Calculator
- Heart Rate Calculator
- Oxygen Saturation (SpO2) Calculator
- TSH (Thyroid) Calculator
- Vitamin D Calculator
- White Blood Cell (WBC) Calculator
- Kidney Function (BUN/Creatinine) Calculator
- Liver Enzyme (ALT/AST) Calculator
- Ferritin Calculator
- Target Heart Rate Calculator
- Protein Intake Calculator
- TDEE Calculator
- One-Rep Max Calculator
- Blood Alcohol Calculator
- Waist-to-Height Ratio Calculator
- Fiber Intake Calculator
- Caffeine Limit Calculator
- Waist-to-Hip Ratio Calculator
- Pace Calculator
- Lean Body Mass Calculator
- Calories Burned Calculator
- Period Calculator
- Pregnancy Weight Gain Calculator
- Body Surface Area Calculator
Math
Percentages, fractions, algebra, geometry
- Percentage Calculator
- Percentage Increase Calculator
- Percentage Difference Calculator
- Fraction Calculator
- Scientific Calculator
- Standard Deviation Calculator
- Quadratic Formula Calculator
- Ratio Calculator
- Area Calculator
- Volume Calculator
- Circle Calculator
- Triangle Calculator
- Square Root Calculator
- Exponent Calculator
- Average Calculator
- Probability Calculator
- Percent Error Calculator
- Pythagorean Theorem Calculator
- GCF and LCM Calculator
- Slope Calculator
- P-Value Calculator
- Confidence Interval Calculator
- Log Calculator
- Significant Figures Calculator
- Scientific Notation Calculator
- Z-Score Calculator
- Odds Calculator
- Graphing Calculator
- Limit Calculator
- Derivative Calculator
- Integral Calculator
- Factor Calculator
- Sample Size Calculator
- Permutation and Combination Calculator
- Distance Calculator
- Surface Area Calculator
- Matrix Calculator
- System of Equations Calculator
- Long Division Calculator
- Factoring Calculator
- Rounding Calculator
- Percentile Calculator
- Summation Calculator
Date & Time
Age, countdown, duration, work days
- Age Calculator
- Date Difference Calculator
- Countdown Calculator
- Business Days Calculator
- Add/Subtract Date Calculator
- Time Zone Converter
- Time Duration Calculator
- Day of the Week Calculator
- Julian Date Calculator
- Week Number Calculator
- Time Card Calculator
- Sleep Calculator
- Hours Calculator
- Unix Timestamp Converter
- Leap Year Calculator
- Generation Calculator
- Age Difference Calculator
- Moon Phase Calculator
- Hijri-Gregorian Date Converter
Construction
Concrete, paint, flooring, roofing
- Concrete Calculator
- Paint Calculator
- Tile Calculator
- Roofing Calculator
- Square Footage Calculator
- Mulch Calculator
- Gravel Calculator
- Asphalt Calculator
- Deck Calculator
- Feet-Inch-Fraction Calculator
- Stair Calculator
- Flooring Calculator
- Drywall Calculator
- Brick Calculator
- Insulation R-Value Calculator
- Paver Calculator
- Fence Calculator
- Board Feet Calculator
Engineering
Electrical, mechanical, structural
- Ohm's Law Calculator
- Voltage Drop Calculator
- Resistor Color Code Calculator
- Horsepower Calculator
- BTU Calculator
- Wire Gauge Calculator
- Flow Rate Calculator
- Pressure Converter
- Solar Panel Size Calculator
- Solar Savings Calculator
- Gear Ratio Calculator
- Torque Calculator
- Beam Load Calculator
- LED Resistor Calculator
- Capacitor Calculator
- Power Factor Calculator
- Density Calculator
- Material Weight Calculator
- AC Sizing Calculator
- Download Time Calculator
Physics
Motion, energy, force, waves
- Velocity Calculator
- Acceleration Calculator
- Force Calculator
- Work Calculator
- Power Calculator
- Kinetic Energy Calculator
- Gravitational Potential Energy Calculator
- Momentum Calculator
- Impulse-Momentum Calculator
- Hooke's Law Calculator
- Centripetal Force Calculator
- Projectile Motion Calculator
- Free Fall Calculator
- Wavelength Calculator
- AP Physics Score Calculator
- Half-Life Calculator
Business
Margin, ROI, payroll, break-even
- Profit Margin Calculator
- Break-Even Point Calculator
- NPV and IRR Calculator
- WACC Calculator
- EBITDA Calculator
- Free Cash Flow Calculator
- Gross Profit Margin Calculator
- Payroll Calculator
- Self-Employment Tax Calculator
- Foreign Earned Income Exclusion Calculator
- QBI Deduction Calculator
- CRA Payroll Deductions Calculator (Federal)
- Sales Tax Calculator
- Markup Calculator
- ROI Calculator
- Inventory Turnover Calculator
- Cash Flow Calculator
- Business Valuation Calculator
- Key Person Life Insurance Calculator
- Startup Runway and Burn Rate Calculator
- Equity Dilution Calculator
- Commission Calculator
- Discount Calculator
- CAGR Calculator
- Depreciation Calculator
- Customer Lifetime Value Calculator
- SaaS Churn Rate Calculator
- CAC Calculator
- Remote Work Savings Calculator
- Return-to-Office Cost Calculator
- Freelance Rate Calculator
- Overtime Calculator
- PTO Calculator
- Discounted Cash Flow Calculator
- Job Offer Comparison Calculator
- SaaS Metrics Calculator
- Employee Cost Calculator
- Salary to Hourly Calculator
- Net Profit Calculator
- Startup Costs Calculator
- Ad Revenue Calculator (RPM, CTR & CPC)
- Affiliate Earnings Calculator
- Recurring Affiliate Income Calculator
- Sponsored Post Rate Calculator
- Traffic Growth Calculator
- Web Hosting Requirements Calculator
- Website Cost Calculator
- Organic CTR & Traffic Forecast Calculator
- Keyword Idea Generator
- Domain Authority Checker
- Keyword Demand Explorer
Education
GPA, grade average, test scores
- GPA Calculator
- Grade Calculator
- Weighted Grade Calculator
- Final Exam Grade Calculator
- Test Score Calculator
- Study Time Planner
- Class Rank Calculator
- Reading Time Calculator
- Word Counter
- College Cost Calculator
- Semester GPA Calculator
- Grade Curve Calculator
- Letter Grade to GPA Calculator
- Target GPA Calculator
- Word Count to Pages Calculator
Lifestyle
Cooking, travel, everyday tools
- Tip Calculator
- Bill Split Calculator
- Fuel Cost Calculator
- Gas Mileage Calculator
- Recipe Cost Calculator
- Bra Size Calculator
- Pet Calorie Calculator
- Air Fryer Converter
- EV Charging Cost Calculator
- EV vs Gas Savings Calculator
- Carbon Footprint Calculator
- Trip Cost Calculator
- Coffee Ratio Calculator
- Cooking Conversion Calculator
- Love Calculator
- Golf Handicap Calculator
- Steps to Miles Calculator
- Pet Age Calculator
- Sleep Cycle Calculator
- Height Calculator
- Darts Checkout Calculator
- Subscription Cost Calculator
- BPM Calculator
- Fret Calculator
- Guitar String Tension Calculator
- Depth of Field Calculator
- 3D Printing Cost Calculator
- Fast-Pass ROI Calculator
- Solar Panel Payback Calculator
- Private Jet Charter Cost Estimator
- Dice Roller
Converters
Units, currency, measurements
- Currency Converter
- Volume Converter
- Temperature Converter
- Length Converter
- Weight Converter
- Speed Converter
- Area Converter
- Roman Numeral Converter
- Shoe Size Converter
- Women's Clothing Size Calculator
- Men's Clothing Size Calculator
- Color Converter (HEX/RGB)
- Binary/Hex Converter
- Data Storage Converter
- Fuel Economy Converter
- Time Converter
- Angle Converter
- Energy Converter
- Power Converter
- Oven Temperature Converter
- Pressure Converter
- Time Zone Converter
Generators
Passwords, QR codes, random picks
- Password Generator
- Case Converter
- Uptime Calculator
- JSON Formatter
- What Is My IP Address?
- Subnet Calculator
- QR Code Generator
- Random Number Generator
- Username Generator
- Dice Roller
- Random Name Picker
- Lorem Ipsum Generator
- Random Color Generator
- Coin Flip Generator
- PIN Generator
- To-Do List Generator
- Random Date Generator
- UUID Generator
- Random Team Generator
- Base64 Encoder & Decoder
- URL Encoder & Decoder
- Robots.txt Generator
- HTML Minifier
- Schema.org JSON-LD Validator
- Meta Tag Generator & Social Preview
- HTML to Markdown Converter
- XML Sitemap Validator
Latest posts
Articles, tips, and updates from the blog.
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Formulas you can check
Every tool shows the exact formula and a worked example, so you understand the answer, not just see it.
Free, always
No account, no paywall, no email required. Every calculator on the site is free to use, in full.
Frequently asked questions
Are the calculators on this site really free?
Yes. Every calculator is free to use, with no account, subscription, or hidden limits.
How accurate are the results?
Each tool uses the standard, published formula for its category, shown directly on the page so you can verify it yourself. For decisions involving money, health, or legal matters, use the results as a starting point and confirm with a qualified professional.
Can I use these calculators on my phone?
Yes, every calculator is fully responsive and designed mobile-first.
Do you store the numbers I enter?
For the vast majority of calculators, no - calculations run entirely in your browser. A small number of tools that need live market data (like currency or gold prices) fetch that from a named third-party API, clearly disclosed in our privacy policy.
About this site
Numeros
Numeros is a free calculator platform covering finance, health, math, construction, business, and everyday life. Every tool ships with the full formula, a worked example, and plain-English explanations, so you understand the number, not just see it. Nothing you type is sent to a server or stored - every calculation runs directly in your browser.
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