Entwicklera guides

Understand the method. Use the tool.

Clear formulas, realistic examples, common mistakes, and practical next steps for business calculations and documents.

GST & invoicing

How to Create a GST Invoice: Fields, Tax Split, and Checklist

Build a clear GST invoice with the right business details, line items, HSN/SAC information, tax breakup, and payment terms.

Investing

Understand monthly compounding, estimated maturity value, invested amount, gains, and how an annual step-up changes the projection.

Salary & compensation

Calculate a raise from a percentage or amount, compare monthly and annual pay, and avoid common CTC-versus-take-home mistakes.

Date & time

Learn how weekends, holidays, start dates, and end dates affect date differences and business-day deadlines.

PDF tools

Combine PDFs cleanly, arrange pages before export, check the finished file, and protect sensitive documents during the process.

Developer tools

See the difference between readable formatting and syntax validation, with examples of common JSON errors and a debugging workflow.

QR & barcodes

Compare data capacity, scanning, print size, error correction, and common use cases before generating the right code.

Image tools

Choose dimensions, format, and quality settings that reduce file size while keeping text, photos, and graphics clear.

GST & invoicing

Learn when GST is added to a taxable value, when it must be extracted from a final price, and how the calculations differ.

Sales documents

Understand the role of quotations and invoices, the information each document needs, and the usual sales workflow between them.

Pricing

Compare the two common pricing percentages and calculate the selling price required for a target profit margin.