About the Author
AllSmartCalculators is built and maintained by Ankit Gupta, a developer and data analyst based in India. Every calculator on the site, every formula explanation, every example, and every limitations note has passed through one person before going live. That single editorial voice is intentional. Tools that touch money and health decisions deserve a clear point of view, not a committee compromise.
This page exists so you know who is on the other side of the screen when you trust a number from this site.
Background
Ankit started building AllSmartCalculators after years of using cluttered, ad-heavy calculator sites and wishing one of them would just be clean, fast, and honest. The first version of the site shipped with a handful of finance tools focused on Indian context: EMI, SIP, GST, and HRA. From there the catalogue grew to 104+ calculators across eight categories: finance, health, math, crypto, engineering, daily life, education, and business.
The technical work is done in TypeScript, with every calculator running entirely in the browser so user inputs never reach a server. The editorial work happens after the formula is implemented and unit-tested: writing the explainer, the worked example with rupee amounts where relevant, the limitations section, and the FAQs. Each page is reviewed against a primary source before publication.
Focus Areas
The site has a clear India-first focus for finance and tax tools. That includes EMI under recognised methods, SIP and lumpsum projections using SEBI-compliant assumptions, GST calculations against current GSTN rates, HRA exemption under Section 10(13A), income tax under both old and new regimes, PPF and NPS using the latest interest and contribution rules, and CIBIL score reasoning based on public credit bureau guidance.
For health calculators, the focus is on WHO and CDC formulas with Asian-specific BMI cutoffs where applicable, and ICMR-aligned dietary references where the topic touches Indian nutrition. Math, engineering, and crypto tools follow NIST and Wolfram MathWorld references and use textbook formulas without invented shortcuts.
Editorial Principles
Five principles guide every page on AllSmartCalculators. First, only recognised formulas from primary sources are used. Second, every calculator is cross-checked against published benchmarks before launch. Third, every page carries a visible limitations note so the boundaries of the result are clear. Fourth, results that depend on changing inputs like tax slabs or repo rates carry a last-updated date and are reviewed against the source at least annually. Fifth, confirmed corrections ship within 48 hours.
There are also some things this site refuses to do. No paywalls, no signup walls, no email capture before a calculator runs, no auto-playing video, no aggressive pop-ups, and no affiliate links inside the calculator output itself. The product is the calculator and the explanation around it. Everything else is removed.
Why India-First Matters
A lot of calculator content on the web assumes a US or UK context. Tax brackets, currency formatting, financial product names, regulatory references, and even date formats all default to a foreign reality. For an Indian user looking up HRA exemption, GST inclusive vs exclusive, or PPF maturity at the current rate, generic global content is at best confusing and at worst wrong.
AllSmartCalculators treats Indian users as the primary audience without making the site useless to anyone else. Currency examples use rupees and lakh and crore. Tax tools reference IT department slabs. EMI examples match the loan products Indian banks actually offer. Health tools include Asian-specific BMI thresholds. Where a topic is universal, like quadratic equations or unit conversion, the content works for any reader.
Get in Touch
If you have a calculator request, a correction, or general feedback, write to allsmartcalculators@gmail.com. Be as specific as you can: which calculator, what input you used, what result you expected, and where you saw a better reference. Every message is read and confirmed corrections ship within 48 hours.
The site grows because users tell us what they need. The faster that feedback loop runs, the better the next version of AllSmartCalculators becomes.