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Free Algebra Calculators Online

Solve fractions, square roots, logarithms, and scientific notation problems.

4 calculators

Algebra forms the backbone of higher mathematics, and our calculator suite covers the operations students and professionals encounter most. Use the Fraction Calculator to add, subtract, multiply, divide, and simplify fractions. Compute any Logarithm — natural, common, or custom base. Convert numbers to and from Scientific Notation. Count and round to the correct number of Significant Figures. Find exact or approximate Square Roots. These five tools together handle the majority of algebraic computation tasks from middle school through university-level coursework.

Algebra Calculators Calculators

Log Calculator (Logarithm)

103 uses

Scientific Notation Calculator

95 uses

Scientific Notation Calculator - old

97 uses

Significant Figures Calculator (Sig Fig)

103 uses

Essential Algebra Tools

Algebraic operations form the foundation for every STEM field. Whether you are simplifying an expression for homework or verifying a lab calculation, our tools deliver accurate results with the formulas shown alongside each answer.

Fraction Calculator

Perform all four arithmetic operations on fractions and mixed numbers. Results are automatically simplified to lowest terms. Ideal for cooking conversions, construction measurements, and coursework.

Logarithm & Square Root

Compute log base 10, natural log (ln), or logs of any custom base. The Square Root Calculator handles perfect squares and irrational roots with configurable precision. Both are essential for exponential equations and growth models.

Scientific Notation & Significant Figures

Convert between standard and scientific notation for very large or small numbers. The Sig Figs Calculator counts significant figures and rounds results to the precision your experiment requires — critical for lab reports and engineering specs.

Who Needs These Calculators?

Students — Check homework and prepare for exams in algebra, pre-calculus, chemistry, and physics.
Scientists — Maintain proper significant figures and convert between notation systems for publication.
Engineers — Verify computations and ensure precision in specification documents.
Teachers — Generate accurate example problems and verify answer keys.

Frequently Asked Questions

Divide both the numerator and denominator by their Greatest Common Divisor (GCD). For example, 24/36: the GCD of 24 and 36 is 12, so 24Ã·12 / 36Ã·12 = 2/3. Our Fraction Calculator simplifies automatically after every operation, so you always get the reduced result.

Log (logâ‚â‚€) uses base 10 and is common in engineering and decibel calculations. Ln (logâ‚‘) uses base e â‰ˆ 2.718 and appears throughout calculus, physics, and natural growth models. They are related by the change-of-base formula: ln(x) = log(x) Ã· log(e). Our Logarithm Calculator supports both plus any custom base.

All non-zero digits are significant. Zeros between non-zero digits are significant. Leading zeros are never significant. Trailing zeros after a decimal point are significant. For example, 0.00450 has 3 significant figures (the 4, 5, and trailing 0). Our Significant Figures Calculator counts and rounds automatically following these rules.

Related Subcategories

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Percentage Calculators

Find percentages, percentage changes, increases, and ratios.

10 calculators

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