About SarvKit
Free financial calculators, health tools, developer utilities, and unit converters — built for everyone.
Our Mission
SarvKit was built with a simple goal: provide free, high-quality tools that anyone can use without sign-ups, paywalls, or hidden fees. Whether you're planning your finances, debugging code, converting data formats, or converting between measurement units, our 102+ tools are designed to be fast, private, and easy to use.
We believe essential tools should be accessible to everyone, regardless of their technical background or financial situation. That's why all calculations and conversions happen entirely in your browser — no data ever leaves your device, and no account is ever required.
What We Offer
Our platform is organized into four specialized tool suites, each designed to solve real-world problems:
CalcWise — Financial Calculators
36 calculators for India, the US & the UK — SIP, EMI, PPF, NPS, tax, GST, EPF, HRA, salary, 401(k), Roth IRA, paycheck, US income tax, student loan, Social Security, ISA, UK income tax, UK mortgage, UK pension, UK student loan, compound interest, mortgage, retirement, FD, RD, CAGR, SWP, step-up SIP, age, BMI, inflation & credit card payoff. Plus 23 in-depth financial guides.
DevKit — Developer Tools
28+ tools including JSON formatter, Base64 encoder, JWT decoder, hash generator, regex tester, SQL formatter, image compressor, timestamp converter, password generator & more. Plus 15 technical blog articles.
UnitSnap — Unit Converters
15 unit converters for length, weight, temperature, speed, volume, area, data storage, fuel efficiency, cooking, time zones, pressure, energy, power, angle & time duration. Plus 9 educational guides.
FitCalc — Health & Fitness
9 health calculators — calorie needs, macro breakdown, body fat %, heart rate zones, ideal weight, water intake, pregnancy due date, calorie burn & sleep cycles. Evidence-based formulas and instant results.
PDFTools — PDF Tools
8 client-side PDF tools — merge, split, rotate, compress, PDF to image, image to PDF, watermark & page numbers. All processing happens in your browser — files never leave your device.
Why We Built This
When searching for financial calculators or developer tools online, we noticed most sites were cluttered with pop-ups, required sign-ups, collected personal data, or hid features behind paywalls. Many calculator sites provided only a basic widget with no explanation of the underlying concepts, leaving users without the context they need to make informed decisions.
We set out to build something different — tools that are not only functional but genuinely educational. Every calculator page includes detailed explanations of the formulas used, real-world examples with specific numbers, comparison tables, common mistakes to avoid, and frequently asked questions. Our developer tools explain the technology behind each operation, and our unit converters include historical context about measurement systems.
The result is a platform with over 102 tools and 53+ in-depth guides and articles, all accessible for free with no restrictions.
Our Values
Free Forever
No subscriptions, no sign-ups, no paywalls. Every tool is completely free to use.
Privacy First
All operations run locally in your browser. We never send your data to any server.
Transparency
We show all formulas, explain our methods, and clearly state tools are not professional advice.
Accessibility
Designed to work on any device — desktop, tablet, or phone. No app download required.
Educational
Every tool includes explanations, examples, and guides to help you learn, not just calculate.
Fast & Lightweight
No heavy frameworks. Every tool loads instantly and works without an internet connection after loading.
Who Is This For?
- Beginners who want to understand how saving and investing works
- Students learning about compound interest, finance, coding, or unit conversions
- Investors planning retirement savings, college funds, or emergency funds
- Home buyers calculating mortgage payments and comparing loan options
- Salaried employees checking EPF, HRA, gratuity, and tax regime benefits
- US workers planning 401(k) contributions, Roth IRA savings, student loan repayment, and Social Security benefits
- Developers & IT professionals formatting JSON, decoding JWTs, testing regex, generating hashes, or converting data formats
- Engineers & scientists converting between measurement units, pressure scales, or energy units
- Home cooks converting between cups, tablespoons, grams, and ounces
- Health-conscious individuals tracking calories, macros, body fat, heart rate zones, and water intake
- Anyone looking for free, no-sign-up tools that respect privacy
Educational Content & Guides
Beyond interactive tools, we publish comprehensive guides to help users make informed decisions:
Financial Guides (CalcWise)
23 in-depth guides covering how to start investing, loan interest strategies, tax deduction benefits, SIP vs FD comparisons, retirement planning, NPS, PPF, EMI reduction, BMI & health, US retirement (401k, Roth IRA, Social Security), student loans, US tax 2026, credit card debt, inflation, debt-free roadmap, and more.
Developer Articles (DevKit)
15 technical blog articles covering topics like Base64 encoding, JWT tokens, regular expressions, JSON Schema, Git workflows, Markdown formatting, and more. Browse the blog →
Unit Conversion Guides (UnitSnap)
9 educational guides exploring the history and science behind measurement systems, including metric vs imperial, temperature scales, cooking measurements, data storage units, and more. Browse guides →
Health & Fitness Guides (FitCalc)
6 evidence-based guides covering nutrition & calories, fitness & exercise, body composition, sleep science & better rest, pregnancy health, and hydration & water intake. Browse guides →
Disclaimer
SarvKit is an educational resource. Financial calculator results are mathematical estimates based on the inputs you provide and standard formulas — they do not constitute financial, investment, or tax advice. Developer tools are provided as-is for convenience. Unit conversion results are mathematical approximations. Always consult qualified professionals for important decisions.
See our full Terms of Service and Privacy Policy for details.