Business Tools
Simple calculators for pricing, pay, margins, discounts, and planning.
Free, fast and easy-to-use calculators to help you solve everyday problems, understand formulas, make better decisions and save time.
Find the final price after discount instantly.
Calculate a percentage of any number, plus percentage increase or decrease, in seconds.
Find the final sale price and how much you save after a percentage discount.
Calculate gross profit and profit margin from revenue and cost.
Calculate a weighted GPA from course grades and credit hours on a 4.0 scale.
Estimate your updated cumulative GPA after a new semester.
Check your attendance percentage and how many classes you may need to reach a target.
More than just calculators — a smarter way to solve everyday problems.
Get instant results in seconds.
100% free for everyone.
Clear and well-tested formulas.
Clean and simple interface.
Each tool uses the same easy upload workspace.
Turn long notes, PDFs, images, and documents into clear revision-ready summaries.
Create exam-focused short and long questions from your uploaded study material.
Generate MCQs, true/false, and short-answer practice with an answer key.
Build a realistic day-by-day plan around your deadline and available study hours.
Convert a syllabus, chapter, or notes file into a practical study checklist.
Create quick question-and-answer flashcards for active recall practice.
Extract key definitions, formulas, dates, facts, and must-remember points.
Get a simple explanation with examples and a short self-check at the end.
Upload a photo or screenshot of a question and get a step-by-step explanation.
Generate a compact pack with summary, questions, quiz, flashcards, and final checklist.
Merge, split, compress and convert files with simple browser-based tools.
Combine multiple PDF files into one PDF directly in your browser.
Extract selected pages or split a PDF into smaller files.
Reduce PDF file size with an adjustable quality setting.
Extract readable PDF text into a Word-compatible document.
Extract PDF text lines into an Excel workbook for further editing.
Convert DOCX files into PDF from your browser.
Convert Excel worksheets into a downloadable PDF.
Add text annotations to a selected PDF page and download the edited file.
Convert every PDF page into a high-quality JPG image.
Combine JPG, PNG, and WebP images into one PDF.
Helpful explanations that support our calculators and give every result context.
Learn the percentage formula, how to find a percentage of a number, and how percentage increase and decrease work.
Read guide →A practical guide to discount percentages, amount saved, final price, and stacked discounts.
Read guide →Understand weighted GPA, grade points, credit hours, and why course weight changes the final GPA.
Read guide →