About Padhai Calc
Padhai Calc is published by a small Hyderabad firm that runs several tool sites. This one exists because the SGPA arithmetic on a marks card, the CGPA-to-percentage rule in a job form and the number-in-words line on a fee challan are done wrong every day by people who could do them right with the formula in front of them.
Pages that depend on a university's or a board's own rule cite it. Pages that are plain arithmetic (a weighted average, a number in words) say so and show the working.
Who runs it
Padhai Calc is published by ABSU Mobilities, a proprietorship of Sumaiya Fatima in Hyderabad, India. The same publisher runs the other ABSU sites. There is no company behind the name beyond that, and no investors.
How the tools are made
Each tool is a small program that runs in your browser. The formula is written out on the tool's page with a worked example, so you can check it by hand. Where a tool depends on a published rate, slab or table, the page names the source and the date we read it. When a source changes, the page is updated and the date moves.
Mistakes
If a result is wrong, or a source is out of date, write to support@abdulsfresh.in with the tool's name and the inputs you used. Corrections are made on the page, with the date.