Frequently Asked Questions
What is UsefulFormula?
UsefulFormula.com is a free online library of 1400+ useful formulas covering mathematics, physics, chemistry, engineering, finance, health, and everyday life applications.
How accurate are the formulas?
All formulas are validated against textbooks, engineering references, and scientific sources. They are accurate for math, physics, chemistry, finance, and health calculations.
What categories of formulas are available?
We include formulas for mathematics, physics, chemistry, engineering, finance, health, and everyday life. Each category includes examples and practical applications.
Are the formulas free to use?
Yes — all formulas are 100% free for students, teachers, professionals, and everyday users. No sign-up required.
Can I request a new formula?
Yes — use the contact form to suggest a formula or calculator. We frequently update with user requests.
Do you provide online calculators?
Yes. Many popular formulas such as EMI, Compound Interest, ROI, CAGR, and BMI include calculators, with more added regularly.
Do you provide worked examples?
Yes. Most formulas include step-by-step examples so you can see how to apply them in real problems — from school math and physics to personal finance and health tracking.
Can I download formulas for offline use?
We are preparing downloadable PDF formula sheets per category and an upcoming mobile app for offline access.
What finance formulas are included?
We include EMI, Compound Interest, ROI, CAGR, Net Present Value (NPV), Internal Rate of Return (IRR), and more — useful for personal finance, business, and investment planning.
Do you have formulas for exams and projects?
Yes. UsefulFormula is ideal for exam preparation, homework, research projects, engineering assignments, and real-world problem-solving.
How often do you add new content?
We regularly add new formulas, calculators, and life hack shortcuts based on search trends and user feedback.
What makes UsefulFormula different from other formula sites?
Our collection is larger (1400+ verified formulas), easier to search, includes step-by-step examples, and covers not just academics but also finance, health, and everyday life formulas.