4 accurate math and science tools for students, teachers, and professionals. Percentage, GPA, scientific, and fraction — instant, free, no signup.
Solve all three common percentage problems: what is X% of Y, X is what percent of Y, and percentage change between two values.
Use Calculator →Full-featured browser calculator with trig functions, logarithms, exponents, roots, and memory. No app download required.
Use Calculator →Calculate semester and cumulative GPA using letter grades or grade points. Supports weighted and unweighted on a 4.0 scale.
Use Calculator →Add, subtract, multiply, and divide fractions with automatic simplification and step-by-step results. Perfect for homework.
Use Calculator →Math is everywhere — in your grades, your taxes, your salary negotiation, and your finances. Having a reliable, fast, and free calculator available in your browser means you never have to guess at an answer. ToolFlow's math tools handle the calculations that come up most in real life, with clear explanations of how each result is reached.
The percentage calculator solves the three most common percentage questions in one place. What is X% of Y? Used for discounts, tips, and tax amounts. X is what percent of Y? Used for scores and ratios. Percentage change from X to Y — for growth rates and price changes. Understanding percentages is one of the most practically valuable math skills you can have.
The scientific calculator provides the functionality of a physical TI calculator without any download. It includes sin, cos, tan and their inverses, natural and base-10 logarithms, exponential functions, nth roots, factorials, and memory storage — everything needed for high school and college-level math, physics, and engineering coursework.
The GPA calculator computes both your semester GPA and cumulative GPA across multiple semesters. Knowing your GPA trajectory helps you identify which courses are impacting your average most and set realistic goals for improvement before the semester ends.
Percentage change = ((New Value – Old Value) / Old Value) × 100. Positive result = increase; negative = decrease. The percentage calculator computes this automatically.
Common thresholds: Cum Laude (3.5+), Magna Cum Laude (3.7+), Summa Cum Laude (3.9+). Use the GPA calculator to model what grades you need in remaining courses to hit your target.
Find the Least Common Denominator (LCD), convert both fractions, then add the numerators. Example: 1/3 + 1/4 → LCD 12 → 4/12 + 3/12 = 7/12. The fraction calculator does this instantly with step-by-step explanation.
Yes. All ToolFlow calculators are fully responsive and optimized for mobile. The scientific calculator has touch-friendly button sizes to work comfortably on smartphone screens.
Explore all math tools above, or visit Finance Calculators, Health & Daily Life, or all 21 ToolFlow calculators.