Delhi, India
Sagar Sahni is a seasoned software developer and finance enthusiast based in Delhi, India. With years of experience building scalable web utilities and analytical tools, Sagar founded Calc Labz to address the lack of transparent, accurate, and completely free calculating platforms.
Sagar directs the technical architecture and editorial review standards for all tools on Calc Labz, ensuring every math formula and financial tax rule is fully documented and validated against official regulatory structures (like RBI and Income Tax Department rules).
Full-stack development with expertise in React, Next.js, TypeScript, and data-driven web applications. Architecture design for scalable, performant calculator platforms.
Deep knowledge of Indian tax regulations (Income Tax Act, GST), investment instruments (SIP, PPF, NPS, ELSS), and financial planning frameworks used by banks and NBFCs.
Research-backed implementation of WHO and peer-reviewed medical formulas including Mifflin-St Jeor (BMR), U.S. Navy body fat method, and Harris-Benedict equations.
All formulas cross-referenced against official sources (RBI, Income Tax Dept, SEBI, WHO). Periodic reviews ensure accuracy with current rates and regulations.
Master your Equated Monthly Installment (EMI) calculations. Understand reducing balance vs flat rate formulas, loan amortization schedules, and prepayment impacts.
Master your Systematic Investment Plan (SIP) calculations. Learn compound interest formulas, rupee cost averaging, and how a 10% annual step-up doubles your wealth.
The ultimate business guide to Goods and Services Tax (GST). Master dual-GST mechanics, RCM rules, input tax credit (ITC) calculations, and invoicing compliance.
The ultimate reference guide to Body Mass Index (BMI). Understand standard categories, standard formulas, muscle-mass anomalies, and body fat correlation metrics.
Compare Old vs New Tax Regimes for FY 2025-26 and FY 2026-27. Understand standard deductions, Section 87A rebates, zero-tax sweet spots, and make the right choice.
How to convert CGPA to percentage for CBSE, VTU, Mumbai University, and other Indian educational boards.