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All-in-One Free Online Calculators for Students and Everyday use.

Easily solve your math, science, finance, and school problems with our fast and reliable calculators — no signup required!

Welcome to CAL-CU.ME, your go-to hub for accurate, easy-to-use online calculators. Whether you're a student solving equations, a teacher needing quick grading tools, or just someone figuring out loan payments — we’ve got you covered.
Our growing collection of smart calculators saves you time and boosts your productivity. No downloads. Just fast results.

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💰 Finance Calculators

Finance Calculators are online tools that help you quickly compute and analyze financial decisions like loans, savings, investments, budgeting, and more. They save time, reduce errors, and provide clear insights for better money management.

Savings Goal Calculator

Loan Calculator

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🧠 Everyday / General Calculators

Everyday / General Calculators are simple tools used for common daily calculations like addition, subtraction, multiplication, division, percentages, conversions, and averages. They're handy for quick math tasks in school, shopping, cooking, or budgeting.

Unit Converter

Percentage Calculator

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❤️ Health & Fitness Calculators

Health & Fitness Calculators are tools that help you track and understand your body and wellness goals. They calculate things like BMI, calorie needs, body fat percentage, ideal weight, and more—supporting healthier lifestyle choices and fitness planning.

BMI Calculator

Calorie Calculator

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📚 Education & Students

Education & Student Calculators are tools designed to help students and teachers with academic tasks. They include GPA calculators, grade predictors, exam score converters, and equation solvers—making studying, planning, and tracking progress easier and more accurate.

GPA Calculator

Math Operations Calculator

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📚 Scientific Calculator

Scientific Calculator is an advanced calculator used for solving complex math, science, and engineering problems. It handles functions like trigonometry, logarithms, exponents, and scientific notation—essential for high school, college, and professional use.

Scientific Calculator

Arithmetic Operations – Addition, subtraction, multiplication, division.
Percent (%) – Calculate percentages easily.
Square (x²) & Square Root (√) – Find powers and roots quickly.
Exponent (EXP or ^) – Used for scientific notation and powers.
Trigonometric Functions – sin, cos, tan, and their inverses (used in geometry and physics).
Logarithmic Functions – log (base 10) and ln (natural log, base e).
Pi (π) – Constant value used in geometry and trigonometry.
Parentheses () – Group operations to follow order of operations (PEMDAS).
Memory Functions (M+, M-, MR, MC) – Store and recall values.
Mode Switching – Switch between degrees and radians for angle calculations.