Convert correct/total answers to percentage and letter grade. Everything runs locally in your browser — nothing is uploaded.
A collection of calculators including EMI, GST, ROI, SIP, percentage, age, date/time, unit conversion, and more. All in one tabbed interface.
Calculate total study hours over a period and see monthly projections.
Calculate gross profit, net income, and margin from revenue, COGS, and operating expenses.
Computes percentage values, percentage increases and decreases, and what-percent-of-what relationships with precise decimal arithmetic. Essential for everyday math — tips, discounts, tax rates, grade scores, and statistical comparisons where quick percentage answers are needed.
Convert percentage scores to letter grades. Enter your percentage to see the corresponding letter grade on standard scale.
Test Score Calculator lets you convert correct/total answers to percentage and letter grade. Everything runs locally in your browser — nothing is uploaded.. It works on any device with a modern web browser.
Convert correct/total answers to percentage and letter grade. Everything runs locally in your browser — nothing is uploaded. It runs entirely in your browser — no software installation or data uploads required.
Direct text entry, file upload, or URL-based input — depending on the tool. All numeric values are entered through input fields with real-time updates.
Yes. After the initial page load, Test Score Calculator runs entirely on your device with no internet connection needed. All processing is done locally.
All calculators use standard financial formulas and are accurate to two decimal places unless otherwise specified.
Some calculators include local storage for recent calculations. History stays on your device and is not shared.
No. These tools provide mathematical calculations for educational and planning purposes. Consult a financial advisor for professional advice.
The currency converter supports 160+ currencies with live exchange rates via a public API, plus an offline fallback matrix.
Basic calculators work offline. The currency converter requires an internet connection for live rates but includes offline fallback data.
Currency Converter
Converts between 160+ world currencies using real-time exchange rates sourced from central banks and financial data providers.
Invoice Generator
Produces downloadable PDF or HTML invoices with customizable line items, tax rates, discounts, and business logo placement.
Receipt Generator
Creates printer-friendly receipt pages with itemized purchases, payment method, date, and merchant details in a compact single-page layout.
IBAN Validator
Validates the structure, length, and check digits of IBANs from 70+ countries using the official ISO 13616 modulus-97 algorithm.
Bulk Invoice & Receipt Parser
Drop 100 invoice PDFs or images, auto-detect date, vendor, amount, and tax, then export a clean CSV ready for tax filing. Replaces expensive accounting OCR per-document fees.
Calculator Kit
A collection of calculators including EMI, GST, ROI, SIP, percentage, age, date/time, unit conversion, and more. All in one tabbed interface.