Calculators
Math calculators
28 tools
Arithmetic, percentages, trigonometry, and more.
- Antilog Calculator Calculate the antilogarithm: raise base b to power y. Fast local calculation with shareable, machine-readable results.
- Arccos Calculator Calculate arccos(x) = cos⁻¹(x) for x in [−1, 1]. Fast local calculation with shareable, machine-readable results.
- Arcsin Calculator Calculate arcsin(x) = sin⁻¹(x) for x in [−1, 1]. Fast local calculation with shareable, machine-readable results.
- Arctan Calculator Calculate arctan(x) = tan⁻¹(x) for any real x. Fast local calculation with shareable, machine-readable results.
- Cos Calculator Calculate cos(θ) in degrees or radians. Fast local calculation with shareable, machine-readable results.
- Division Calculator Divide numbers with quotient, remainder, and decimal results for quick arithmetic checks. Runs locally in your browser. Free online tool — no sign-up.
- Exponent Calculator Calculate aⁿ for a real base and exponent. Fast local calculation with shareable, machine-readable results.
- Exponential Growth Calculator Model exponential growth or decay from initial value, rate, and time. Runs locally in your browser. Free online tool — no sign-up. Try it free.
- Factorial Calculator Calculate n! for integers 0 ≤ n ≤ 5000. Fast local exact integers with shareable, machine-readable results.
- Fractions Calculator Add, subtract, multiply, or divide fractions and mixed numbers with step-by-step LCD work. Free online tool — no sign-up. Runs locally in your browser.
- GCF Calculator Find the GCF, GCD, or HCF of two or more integers. Exact BigInt Euclidean fold with factor and prime cross-checks. Free, no sign-up.
- LCM Calculator Find the LCM of two or more integers with exact arithmetic and independent verification. Free, no sign-up.
- Log Calculator Evaluate logarithms (common, natural, or arbitrary base) for x > 0. Fast local calculation with shareable, machine-readable results.
- Multiplication Calculator Multiply two numbers instantly, or see long multiplication with partial products, carrying, decimals, and sign rules. Runs locally in your browser.
- Natural Log (ln) Calculator Calculate ln(x) = log_e(x) for x > 0. Fast local calculation with shareable, machine-readable results.
- Percent Error Calculator Compute percent error between experimental and accepted values for lab and measurement checks. Interactive calculations run locally; shared URLs and REST use the same engine. Free — no sign-up.
- Percentage Calculator Calculate percentages, percentage of a number, and “what percent is X of Y” with clear arithmetic steps. Runs locally in your browser. Try it free.
- Percentage Change Calculator Calculate the percentage increase or decrease from an initial value to a final value. You can also solve for the initial or final value. Free online — no sign-up.
- Pythagorean Theorem Calculator Solve a right triangle with a² + b² = c². Enter any two of legs a, b and hypotenuse c to find the third side, plus area and perimeter. Try it free.
- Quadratic Formula Calculator Solve ax² + bx + c = 0 with the quadratic formula. Free online tool — no sign-up. Clear formulas and worked examples. Runs locally in your browser.
- Ratio Calculator Simplify ratios and scale quantities that stay in proportion. Runs locally in your browser. Free online tool — no sign-up. No account needed.
- Root Calculator Calculate the principal real nth root ⁿ√a. Fast local calculation with shareable, machine-readable results.
- Scientific Notation Calculator Convert numbers to scientific, E, and engineering notation. Free online tool — no sign-up. Mobile-friendly and privacy-first. Runs locally in your browser.
- Sin Calculator Calculate sin(θ) in degrees or radians. Fast local calculation with shareable, machine-readable results.
- Square Root Calculator Calculate the principal square root √x. Fast local calculation with shareable, machine-readable results.
- Subtraction Calculator Subtract minuend − subtrahend to get the difference. Free online tool — no sign-up. Clear formulas and worked examples. Interactive calculations run locally in your browser.
- Sum Calculator Add a list of numbers (sum), see the mean, or work long addition with place-value steps. Paste values separated by commas, spaces, or new lines — decimals and negatives.
- Tan Calculator Calculate tan(θ) = sin(θ)/cos(θ) in degrees or radians. Fast local calculation with shareable, machine-readable results.