Contact
Feedback, corrections and calculator requests are welcome.
Hisaab is built and maintained by Ahmad Raza. The best way to get in touch, whether you have spotted an error in a calculation, want a new calculator added, or just have feedback, is via LinkedIn.
Reporting a calculation error
Accuracy matters here. If a result looks wrong, please include the calculator, your exact inputs (a shareable result link is ideal), and what you expected, so it can be checked and fixed quickly.
For the reasoning and sources behind the numbers, see the about page and the openly published reference data at data/rates.json.