Who Contributed to What
Tools and content on thecalcu.com, by the person who authored or reviewed it.
Each team member reviews and vets the formulas, methodology, and content of the tools in their domain. This page shows exactly what each person has worked on. Select a name to read more about them.
Anurag RathAdviser
1852 authored0 reviewed
Authored
Calculators 673
- 401(k) Calculator
- 401(k) Contribution Calculator
- 529 Plan Calculator
- 6 Minute Walk Test Calculator
- 80C Deduction Calculator
- A1c Calculator
- ABI Calculator (Ankle-Brachial Index)
- ABSI Calculator
- Absolute Eosinophil Count Calculator
- Absolute Lymphocyte Count Calculator
- Absolute Reticulocyte Count Calculator
- AC Tonnage Calculator
- ACFT Calculator
- Activation Energy Calculator
- Activity Coefficient Calculator
- Actual Yield Calculator
- Added Sugar Intake Calculator
- Addiction Calculator
- Adjusted Age Calculator
- Adjusted Body Weight Calculator
- AFR Calculator
- AFT Calculator (US Army Fitness Test)
- Age Calculator
- Age Difference Calculator
- AHI Calculator (Apnea-Hypopnea Index)
- AI Water Footprint Calculator
- Air Changes per Hour Calculator
- Air Conditioner BTU Calculator
- Air Force PT Calculator
- Air Fryer Time & Temp Conversion Calculator
- Albumin Globulin Ratio Calculator
- Alcohol Unit Calculator
- Allele Frequency Calculator
- Alligation Calculator
- Aluminum Weight Calculator
- ANC Calculator (Absolute Neutrophil Count)
- ANC Calculator without Bands
- Angle Cut Calculator
- Angle of Depression Calculator
- Annuity Calculator
- Aortic Valve Area Calculator
- APFT Calculator
- Appreciation Calculator
- APR Calculator
- Arch Calculator
- Army Body Fat Calculator
- Arrhenius Equation Calculator
- Arterial Age Calculator
- Asphalt Calculator
- Atom Calculator
- Atom Economy Calculator
- Atomic Mass Calculator
- Australia Income Tax Calculator
- Australia Superannuation Calculator
- Average Atomic Mass Calculator
- Avogadro's Number Calculator
- Baby Eye Color Calculator
- Baby Formula Calculator
- Baby Percentile Calculator
- Baby's Milk Intake Calculator
- BAC Calculator
- Bacterial Doubling Time Calculator
- Bag Footprint Calculator
- BAI Calculator
- Baker's Percentage Calculator
- Baluster Calculator
- Batting Average Calculator
- BBT Calculator (Basal Body Temperature)
- Beam Deflection Calculator
- Beam Load Calculator
- Bedridden Patient Height Calculator
- BEE Calculator
- Beer-Lambert Law Calculator
- Bending Stress Calculator
- Betting Odds Converter
- Bike Average Calculator
- Bike Loan EMI Calculator
- Bill Split Calculator
- Birdsmouth Cut Calculator
- Birth Weight Percentile Calculator
- +593 more
Converters 173
- Acceleration Converter
- Acres to Square Feet Converter
- Alcohol Proof to ABV Converter
- Angle Converter
- Angular Acceleration Converter
- Angular Velocity Converter
- Area Converter
- Astronomical Distance Converter
- Audio Format Converter
- AVIF to PNG Converter
- Beaufort Wind Scale Converter
- Bitrate Converter
- BMP to PNG Converter
- Camera Aperture (f-stop) Converter
- Capacitance Converter
- Case Converter
- Celsius to Fahrenheit Converter
- CGS to SI Units Converter
- Clothing Size Converter
- Colour Converter
- Concentration Converter
- Cooking Measurement Converter
- Coordinates Converter — Decimal Degrees & DMS
- CSV to Excel Converter
- Currency Converter
- Data Storage Converter
- Data Transfer Converter
- Decibel Gain/Ratio Converter
- Density Converter
- Diamond Carat to Grams Converter
- Diopter to Focal Length Converter
- DOCX to PDF Converter
- DOCX to Text Converter
- Dry Volume Converter
- Earthquake Magnitude to Energy Converter
- Electric Charge Converter
- Electric Conductance Converter
- Electric Conductivity Converter
- Electric Current Converter
- Electric Field Strength Converter
- Electric Potential Converter
- Electric Resistance Converter
- Electric Resistivity Converter
- Elo Rating Difference to Win Probability Converter
- Energy Converter
- Excel to CSV Converter
- Fabric Weight (GSM) Converter
- Fahrenheit to Celsius Converter
- Feet & Inches to Centimetres Converter
- Flow Converter
- Force Converter
- Fraction to Decimal Converter
- Frequency Converter
- Frequency-Wavelength Converter
- Fuel Efficiency (Mass) Converter
- Fuel Efficiency Converter
- Gallons to Litres Converter
- GIF to PNG Converter
- Glove Size Converter
- GPA Scale Converter
- Hardness Scale Converter
- Hat Size Converter
- Heat Density Converter
- Heat Flux Density Converter
- Heat Transfer Coefficient Converter
- HEIC to JPG Converter
- Historical USD Exchange Rate
- HTML to Image Converter
- HTML to PDF Converter
- ICO to PNG Converter
- Illumination Converter
- Image Resolution Converter
- Image to Base64 Converter
- Images to PDF Converter
- Indian Number System Converter
- Inductance Converter
- JPG to PNG Converter
- JPG to WebP Converter
- Julian Date Converter
- Karat Purity Converter
- +93 more
Generators 34
- API Key Generator
- Baby Name Generator
- Barcode Generator
- Business Name Generator
- Coin Flip / Dice Roller
- Cover Letter Generator
- Disclaimer Generator
- DMCA Takedown Notice Generator
- Email Signature Generator
- Email Signature Generator
- Gift Message Generator
- Hash Generator
- LinkedIn Headline Generator
- Lorem Ipsum Generator
- Meme Text Generator
- Passphrase Generator
- Password Generator
- PIN Generator
- Privacy Policy Generator
- QR Code Generator
- Random Name Generator
- Random Number Generator
- Random Quote Generator
- Secret Santa Generator
- Slogan / Tagline Generator
- SSL Certificate CSR Generator
- Tarot Card Draw Generator
- Team Generator
- Terms & Conditions Generator
- Thank You Note Generator
- Twitter / X Bio Generator
- Username Generator
- W-2 / 1099 Sample Generator
- WiFi QR Code Generator
Validators 63
- Aadhaar Number Validator
- AAMVA Barcode Validator
- Ads.txt Validator
- Amex & Discover Card Validator
- App-ads.txt Validator
- Australia ABN Validator
- Australia TFN Validator
- Bitcoin / Ethereum Address Validator
- Canada SIN Validator
- Colour Code Validator
- Credit Card Number Validator
- Cron Expression Validator
- CSS Property Validator
- CUSIP / ISIN Validator
- Date Validator
- Disposable Email Domain Validator
- Domain Name Validator
- Driving Licence Validator
- DUNS Number Validator
- EIN Validator
- Email Validator
- FCC ID Validator
- GST Number Validator
- GTIN / UPC / EAN Barcode Validator
- HTML Meta Tags Validator
- HTML Validator
- IBAN Validator
- IFSC Code Validator
- IMEI Validator
- IMEI Validator (US Carriers)
- IP Address Validator
- ISBN Validator
- JSON Schema Validator
- JSON Validator
- JWT Validator
- Known Traveler Number Validator
- MAC Address Validator
- Medicare ID Validator
- NPI Number Validator
- OpenAPI / Swagger Validator
- PAN Number Validator
- Password Strength Checker
- Phone Number Validator
- Pincode / ZIP Validator
- Regex Tester
- Robots.txt Validator
- Routing Number Validator
- SemVer Validator
- Sitemap Validator
- SSN Validator
- SWIFT / BIC Code Validator
- UK National Insurance Number Validator
- UPI ID Validator
- URL Validator
- US Driver's License Validator
- US Passport Number Validator
- US ZIP Code Validator
- UUID Validator
- VAT Number Validator
- Vehicle Registration Validator
- VIN Validator
- XML Validator
- YAML Validator
Articles 348
- 401(k) vs IRA — Which to Fund First?
- 403(b) vs 401(k) — Key Differences in 2026
- ACFT vs APFT — What Changed in Army Fitness Testing
- Algebra & Number Theory Calculators: A Complete Guide
- API Security Guide — Keys, Auth & Best Practices
- Australia vs Canada Income Tax — Which Takes More From Your Paycheck?
- Baby & Child Growth Percentile Tracking Guide
- Balance, Charge, Current: Equilibrium & Electrochemistry
- Best BMI Calculators Online 2026
- Best Calorie & Diet Planning Calculators Online 2026
- Best Calorie Calculators for Weight Loss 2026
- Best Developer Project Setup Generators 2026
- Best Email Marketing Calculators 2026
- Best EMI Calculators India 2026
- Best Everyday Unit Converters You Didn't Know You Needed
- Best Fitness Calculators Online 2026
- Best Free Audio, Video & Web Capture Converters Online 2026
- Best Free Avatar & Icon Generators Online 2026
- Best Free Business Calculators Online 2026
- Best Free Calculators for Students 2026
- Best Free Code Formatters Online 2026
- Best Free Document & File Converters Online 2026
- Best Free Electrical & Physics Unit Converters Online
- Best Free Financial Calculators for Americans 2026
- Best Free Fun & Novelty Tools Online
- Best Free Image Format Converters Online 2026
- Best Free Investment Calculators India 2026
- Best Free Loan Calculators Online 2026
- Best Free Online Validators for Developers 2026
- Best Free Unit Converters Online 2026
- Best Free Zodiac & Astrology Calculators Online
- Best GST Calculators India 2026
- Best Home Improvement Calculators Online 2026
- Best Income Tax Calculators India 2026-27
- Best JSON Formatters Online 2026
- Best Legal Document Generators Online 2026
- Best LinkedIn Profile & Content Tools
- Best Marketing ROI Calculators 2026
- Best Mortgage Calculators in the US 2026
- Best Numerology Calculators Online
- Best Password Generators Online 2026
- Best QR Code Generators Online 2026
- Best Retirement Calculators for US Workers 2026
- Best Retirement Calculators India 2026
- Best Salary Calculators India 2026 — Free Tools for Salaried Employees
- Best Science & Engineering Unit Converters Online 2026
- Best SIP Calculators in India 2026
- Best Startup Metric Calculators 2026 — Free Tools for Founders
- Best Tax Saving Tools for Salaried Employees India 2026
- Best US Loan Calculators: Mortgage, HELOC, Auto, and Student Loans
- Best US Tax Calculators 2026
- Best UUID / GUID Generators Online 2026
- Blood Cell Count & Ratio Calculators: A Lab Values Guide
- Blood, Body Fluid and Body Composition Calculator Guide
- BMI Calculators for Every Age & Infant Feeding Tracking Guide
- BMI vs Body Fat Percentage — Which is the Better Health Measure?
- BMI vs Body Roundness Index (BRI) — Which Is More Accurate?
- Body Composition & Shape Guide — ABSI, BRI, BAI and Beyond BMI
- Boiling, Freezing, Floating: Phase & Colligative Properties
- Building Your Personal Brand: Design, Copy & Discoverability
- CAC vs CLV — The Most Important Ratio in Business
- CAGR vs Absolute Return — What's the Difference?
- Calorie Deficit vs Calorie Cycling — Which Works Better?
- Car Buying Guide — India 2026
- Car Loan vs Car Lease — Which Makes More Financial Sense?
- Cholesterol & Heart Health Guide
- Code & Data Cleanup Formatters: A Developer's Toolkit
- Common Measurement Converters: Area, Volume & Distance
- Content & Channel ROI Calculators for Marketers
- Coverage, Weight & Fill: A Materials Estimating Guide
- CPC vs CPM — Paid Advertising Compared
- CPM vs RPM — Understanding Creator Ad Revenue
- Credit Card vs Debit Card — Financial Impact Compared
- Cricket & Baseball Stats Calculators: Averages, Strike Rate & Run Rate
- Crystal Structure and Lattice Energy Toolkit
- Cutting Angles: A Precision Layout Handbook
- Data Distributions & Relationships: Correlation, Regression & Probability
- Data Format Validators: IPs, MAC Addresses, ISBNs & More
- Debt Avalanche vs Debt Snowball — Best Debt Payoff Strategy
- Debt Payoff Guide — India 2026
- +268 more
Glossary 467
- 1099
- 401(k)
- 529 Plan
- A1C
- Aadhaar
- ABI
- ABN
- Absolute Return
- ABV
- Acceleration
- Activation Energy
- Ad Viewability Rate
- Adjusted Gross Income
- Advance Tax
- AIS
- Alcohol Unit
- Allele Frequency
- Alpha
- Amortisation
- AMT
- Annuity
- AOV
- Appraisal
- Appreciation
- APR
- APY
- ARAI
- ARR
- Asset Allocation
- ATP
- AUM
- Avogadro's Number
- BAC
- Back-End Ratio
- Backdoor Roth IRA
- Baker's Percentage
- Balance Transfer
- Basic Salary
- Basis Points
- Beam Deflection
- Beta
- Bharat Series (BH)
- BMI
- BMR
- Board Foot
- Body Fat Percentage
- Bonus Issue
- Book Value
- Break-Even Point
- BRI
- BTU
- Buffer Solution
- Built-Up Area
- Burn Rate
- CAC
- CAC Payback Period
- CAGR
- Caloric Deficit
- Calorie Deficit
- Cap Rate
- Capital Gains Tax
- Carbon Footprint
- Carpet Area
- Carrying Capacity
- Cart Abandonment Rate
- Centripetal Force
- Cess
- CFM
- CGS
- CGST
- Check Digit
- Chi-Square Test
- Chinese Zodiac
- Cholesterol Ratio
- Churn Rate
- Circle Rate
- Closing Costs
- CLV
- Cocktail Dilution
- Coefficient of Variation
- +387 more
Formulas 9
Examples 19
- $500 a Month into an RRSP for 25 Years
- $75,000 Income Tax in Ontario — Federal and Provincial
- $90,000 Income Tax in Australia — With the Medicare Levy
- £45,000 Salary — UK Take-Home Pay for 2024/25
- £500 a Month into a Stocks and Shares ISA for 10 Years
- ₹5 Lakh Fixed Deposit for 1 Year — Maturity Amount
- ₹5 Lakh Personal Loan for 3 Years — Monthly EMI
- ₹50 Lakh Home Loan for 20 Years — Monthly EMI
- ₹8 Lakh Car Loan for 5 Years — Monthly EMI
- Adding 20% VAT to a £1,000 Invoice
- Claiming Social Security at 62 on a $2,000 Full-Retirement Benefit
- Council Tax on a Band D Home for a Single Person
- Federal Income Tax on an $85,000 Salary (Single Filer)
- GST on a Restaurant Bill — Worked Example
- Maxing Out a $23,000 401(k) Contribution — Projected Balance
- PPF at ₹1.5 Lakh Per Year — Full 15-Year Maturity
- SIP of ₹10,000 Per Month — What You'd Get
- Stamp Duty on a £350,000 First Home (SDLT)
- Superannuation on an $85,000 Salary Over 25 Years
Quizzes 66
- 401(k) Readiness Quiz
- 529 Plan / College Savings Quiz
- Are You a Smart Borrower?
- Are You Getting Enough Sleep? Quiz
- Are You Loan-Ready? Quiz
- Are You Missing Tax-Saving Deductions? Quiz
- Are You on Track for Retirement (US)?
- Are You Overpaying on Your Electricity Bill? Quiz
- Are You Ready to Buy a Home?
- Are You Saving Enough for Retirement? Quiz
- Base64 & Encoding Knowledge Quiz
- BMI and Health Knowledge Test
- Can You Pass the Army ACFT?
- Capital Gains Tax Knowledge Quiz
- Compound Interest Knowledge Quiz
- Credit Card Habits Quiz
- Credit Score Knowledge Quiz
- Debt Payoff Strategy Quiz (Avalanche vs Snowball)
- Do You Need to Take an RMD?
- Emergency Fund Readiness Quiz
- FICA & Paycheck Basics Quiz
- Financial Health Score
- Fitness Myths Quiz
- Gold or Equity? Quiz
- How Well Do You Know JSON?
- How Well Do You Understand GST?
- How Well Do You Understand VAT?
- HTML & CSS Basics Quiz
- Hydration Habits Quiz
- Income Tax Quiz (India)
- Investment Basics for Beginners
- Investor Risk Profile Quiz
- JavaScript Basics Quiz
- Metabolic Age Quiz
- Moving Budget Readiness Quiz
- Mutual Funds Knowledge Test
- National Insurance Basics Quiz
- Net Worth Check-In Quiz
- Nutrition Basics Quiz
- Old vs New Tax Regime Quiz
- Overtime & Paycheck Basics Quiz
- Password Security Quiz
- Personal Budgeting Basics Quiz
- Prepay Your Loan or Invest the Extra Cash? Quiz
- Regex Knowledge Quiz
- Roth or Traditional?
- RSU & Equity Compensation Quiz
- Self-Employment Tax Quiz
- Should You Refinance Your Mortgage?
- Should You Rent or Buy? Quiz
- SIP or Lumpsum? Quiz
- SQL Knowledge Test
- Stamp Duty Readiness Quiz
- Stock Market Basics Quiz
- Stress & Recovery Check-In Quiz
- Student Loan Forgiveness Eligibility Quiz
- Term or Whole-Life Insurance? Quiz
- UK Pension & ISA Basics Quiz
- UK Take-Home Pay Quiz
- W-4 Withholding Check Quiz
- Wedding Budget Readiness Quiz
- What's Your Daily Calorie Target? Quiz
- What's Your Financial Personality? Quiz
- What's Your Fitness Level? Quiz
- What's Your Investing Timeline?
- Which Savings Instrument Fits You? Quiz
Anubhav RathaAdviser
61 authored0 reviewed
Authored
Calculators 61
- Acceleration Calculator
- Area Calculator
- Average Calculator
- Binomial Distribution Calculator
- Break-Even Calculator
- Centripetal Force Calculator
- Chi-Square Test Calculator
- Circle Calculator
- Coefficient of Variation Calculator
- Confidence Interval Calculator
- Correlation Coefficient Calculator
- Covariance Calculator
- Density Calculator
- Distance Between Coordinates Calculator
- Escape Velocity Calculator
- Factorial Calculator
- Force Calculator
- Fraction Calculator
- Free Fall Calculator
- Frequency & Wavelength Calculator
- GCF and LCM Calculator
- Impulse Calculator
- Interquartile Range (IQR) Calculator
- Kinetic Energy Calculator
- Linear Regression Calculator
- Margin Calculator
- Margin of Error Calculator
- Mechanical Power Calculator
- Momentum Calculator
- Normal Distribution Calculator
- Percentage Calculator
- Percentage Change Calculator
- Percentile Rank Calculator
- Permutation and Combination Calculator
- Poisson Distribution Calculator
- Potential Energy Calculator
- Pressure Calculator
- Prime Factorization Calculator
- Probability Calculator
- Profit & Loss Calculator
- Projectile Motion Calculator
- Pythagorean Theorem Calculator
- Quadratic Formula Calculator
- Ratio Calculator
- Root Calculator
- Sample Size Calculator
- Scientific Notation Calculator
- Slope Calculator
- Specific Gravity Calculator
- Speed Calculator
- Standard Deviation Calculator
- Statistics Calculator
- Surface Area Calculator
- T-Test Calculator
- Terminal Velocity Calculator
- Torque Calculator
- Triangle Calculator
- Velocity Calculator
- Volume Calculator
- Work Calculator
- Z-Score Calculator
Yashaswini ShivaprakashAdviser
53 authored0 reviewed
Authored
Calculators 53
- A/B Test Significance Calculator
- Ad Spend Budget Calculator
- Ad Viewability Rate Calculator
- Affiliate EPC Calculator
- Breakeven ROAS Calculator
- Burn Rate Calculator
- CAC Payback Period Calculator
- Campaign ROI Calculator
- Churn Rate Calculator
- Click-Through Rate Calculator
- Content Marketing ROI Calculator
- Conversion Rate Calculator
- CPA Calculator
- CPC Calculator
- CPE Calculator (Cost Per Engagement)
- CPL Calculator (Cost Per Lead)
- CPM Calculator
- CPV Calculator (Cost Per View)
- Customer Acquisition Cost Calculator
- Customer Lifetime Value Calculator
- Customer Retention Rate Calculator
- Direct Mail ROI Calculator
- Email Click-to-Open Rate Calculator
- Email List Growth Rate Calculator
- Email Marketing ROI Calculator
- Email Open Rate Calculator
- Email Unsubscribe Rate Calculator
- Engagement Rate Calculator
- Follower Growth Rate Calculator
- Influencer Rate Calculator
- Instagram Engagement Rate Calculator
- Landing Page ROI Calculator
- Lead-to-Customer Rate Calculator
- LTV:CAC Ratio Calculator
- Marketing Budget % of Revenue Calculator
- Marketing ROI Calculator
- Maximum CPC Bid Calculator
- MRR / ARR Calculator
- Net Promoter Score (NPS) Calculator
- Organic Traffic Value Calculator
- Podcast Ad Rate Calculator
- Reach & Frequency Calculator
- ROAS Calculator
- Sales Funnel Calculator
- SEO ROI Calculator
- Share of Voice Calculator
- Social Media ROI Calculator
- Text to HTML Ratio Calculator
- TikTok Earnings Calculator
- Video Completion Rate (VCR) Calculator
- Viral Coefficient (K-Factor) Calculator
- Website Ad Revenue Calculator
- YouTube Earnings Calculator
Karthik HebbarAdviser
39 authored0 reviewed
Authored
Formatters 39
- Aadhaar Number Formatter
- Base64 Encoder / Decoder
- Binary / Hex Converter & Formatter
- Case Converter
- Code Beautifier
- Code Minifier
- CSS Formatter
- CSV Cleaner & Formatter
- CSV to JSON Converter
- cURL to Code Converter
- Date Formatter
- HTML Formatter
- HTML to Markdown Converter
- JavaScript Object to JSON Formatter
- JSON Formatter/Beautifier
- JSON Minifier
- JSON to CSV Converter
- JSON to SQL INSERT
- JSON to TypeScript Interface
- JSON to YAML Converter
- JSON to Zod Schema
- Line Break Remover
- LinkedIn Text Formatter
- Log File Formatter
- Markdown Previewer
- Markdown to HTML Converter
- Number Formatter
- PAN Number Formatter
- Rupee Formatter
- SQL Formatter
- Tab to Space Converter
- Text Diff Checker
- Text to Slug Converter
- URL Encoder / Decoder
- Word & Character Counter
- XML Formatter
- XML to JSON Converter
- YAML Formatter
- YAML to JSON Converter
Kunal BandekarAdviser
29 authored0 reviewed
Authored
Generators 21
- .gitignore Generator
- .htaccess Generator
- Bulk URL Generator
- Cron Expression Generator
- Fake Data Generator
- Fake Email Generator
- Fake Phone Number Generator
- ICS Calendar Invite Generator
- Markdown Table Generator
- Meta Description Generator
- OG Image Generator
- Open Graph & Twitter Card Generator
- Open Source License Generator
- README Generator
- Regex Generator
- robots.txt Generator
- Schema Markup Generator (JSON-LD)
- Sitemap.xml Generator
- UTM Link Generator
- UUID/GUID Generator
- vCard Generator
Kewal KrishnaAdviser
6 authored0 reviewed
NaveenAdviser
0 authored0 reviewed
No contributions assigned yet.
Ravindra PujariAdviser
0 authored0 reviewed
No contributions assigned yet.
Manas Ku. PanigrahiAdviser
0 authored0 reviewed
No contributions assigned yet.
Mitali M RathaAdviser
0 authored0 reviewed
No contributions assigned yet.