Math & utility · Everyday tools
Math & Utility Calculators: Percentage, Pharma, Railways and Electronics
These math and utility calculators solve quick everyday sums: percentages for marks, discounts and GST, PTR and PTS for pharma pricing, the date IRCTC booking opens for a journey, and the value of an SMD resistor code. Small tools, but ones people come back to every week.
What each utility calculator is for
- [Percentage calculator](/percentage-calculator/): X% of a number, percentage change, marks percentage, discounts and reverse GST.
- [PTR PTS calculator](/ptr-pts-calculator/): price to retailer and stockist from MRP for chemists, distributors and medical representatives.
- [IRCTC date calculator](/irctc-date-calculator/): the 60-day booking-open date and Tatkal timings for any journey.
- [SMD resistor calculator](/smd-resistor-calculator/): 3-digit, 4-digit, R-type and EIA-96 codes decoded to ohms.
All utility tools work offline once the page has loaded and can be added to a phone's home screen from the browser menu.
FAQ
Math & Utility calculators: FAQ
Are these utility calculators free?
Yes, free with no sign-up.
Do the calculators work on mobile?
Yes. Every page is designed for phones first.
Can I suggest a new utility calculator?
Yes. Send the idea on WhatsApp or by email from the contact page.