About Sagar
Sagar Sahni is a developer and financial technology enthusiast based in India. He founded Calc Labz with a simple mission: make accurate, free calculation tools accessible to everyone — without signups, ads interrupting your work, or data collection.
With a strong background in web development and a passion for making complex calculations simple, Sagar has personally designed, built, and validated over 300 calculators spanning finance, health, math, engineering, construction, science, and everyday utilities. Each calculator uses industry-standard formulas and is regularly verified against official sources.
Sagar believes that financial literacy and access to accurate tools should not be gatekept behind paywalls or registration walls. Every tool on Calc Labz is free forever, works offline via PWA technology, and keeps all user data strictly on the user's device.
Our Quality Methodology
Every calculator and guide on Calc Labz follows a rigorous quality process:
- Formula Verification: All formulas are sourced from official government publications (Income Tax Department, RBI circulars), textbooks, and peer-reviewed standards (WHO guidelines, IPC-2221 for engineering).
- Worked Examples: Each calculator includes at least one worked example with realistic values, verified against manual calculations and official tools (SBI EMI calculator, government tax portals).
- Periodic Updates: Tax calculators are updated every financial year. Health calculators reflect the latest clinical guidelines. Construction cost data uses current market rates.
- Error Reporting: Users can report incorrect results via our contact page. Every report is investigated and corrected within 48 hours.
- Transparency: Every calculator shows the exact formula used via the "How is this calculated?" section. No black-box calculations.
Content Guidelines
All written content — guides, FAQs, and calculator descriptions — follows these principles:
- Original Content: All text is written specifically for Calc Labz. We do not scrape, copy, or spin content from other sources.
- Indian Context: Where applicable, content is tailored for Indian users with INR examples, Indian tax laws, and India-specific health guidelines (like Asian BMI cutoffs).
- Medical & Financial Disclaimers: Health and finance calculators always include appropriate disclaimers advising users to consult professionals for important decisions.
- No Misleading Claims: We never claim our tools replace professional advice. Calculator results are clearly labeled as estimates.
- Accessibility: Content is written in clear, simple English accessible to non-expert users while remaining technically accurate.
For full details, see our Editorial Policy and Disclaimer.
Privacy Commitment
Calc Labz is built with privacy as a core principle:
- All calculations run 100% on your device — no data is sent to any server.
- We use no tracking cookies by default. Google Analytics and AdSense load only after explicit user consent.
- Your calculation inputs, results, favorites, and notes are stored in your browser's localStorage and never transmitted.
- The site works fully offline as a PWA — proof that no server communication is needed.
Read our complete Privacy Policy.
Get In Touch
Found an error in a calculator? Have a suggestion for a new tool? Want to collaborate?