Free Study Tools & Calculators for Students

Revisiontown Recommends

Free Study Tools Every Student
Should Bookmark Right Now

Whether you're cramming for the SAT, tracking your GPA, or trying to figure out how compound interest actually works — the right tool saves you hours. We've put together a short list of genuinely useful, completely free resources that students at Revisiontown keep coming back to.

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Education & Exams

OmniCalc.Space

If you only bookmark one calculator site this year, make it this one. OmniCalc covers everything from GPA and CGPA to SAT & ACT score estimates, AP Exam composites, IB totals, and even IELTS/TOEFL band projections. Over 50 education-specific calculators, zero sign-up, works instantly on mobile.

  • GPA Calculator
  • SAT Score Estimator
  • AP Exam Composite
  • IB Calculator
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Math, Science & More

OmniCalculator.Space

Think of this as the Swiss Army knife of online calculators. Whether you're working on unit conversions, brushing up on science and engineering formulas, or need a quick everyday math answer, OmniCalculator.Space has it covered. Updated for 2026 with clean results and no login walls.

  • Unit Conversion
  • Science & Engineering
  • Math & Geometry
  • Everyday Tools
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SAT Prep

SATHelp 24×7

Prepping for the SAT can feel overwhelming, but SATHelp 24×7 puts everything in one clean platform. You get topic-by-topic study notes, practice quizzes and flashcards, past papers, a score tracker, and smart revision planning — all for free. Great for students who need structure without the price tag.

  • Study Notes
  • Practice Quizzes
  • Flashcards
  • Score Tracking
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Finance & Health

CalculatorWallah

Life after graduation means dealing with taxes, mortgages, and payslips. CalculatorWallah makes that less scary with 76+ free calculators across tax planning, paycheck breakdowns, BMI and calorie tracking, and compound interest. No sign-up, no paywalls — precise results, zero cost.

  • Tax Calculator
  • Paycheck Estimator
  • BMI & Calories
  • Mortgage Tool

Frequently Asked Questions

Quick answers about free study tools and calculators for students.

All tools listed above are free, independently maintained, and regularly updated.

Revisiontown does not charge for accessing these external resources. We simply share what actually helps students study better.