Mathématiques de base
Calculateurs de mathématiques et de statistiques avec formules détaillées étape par étape et exemples résolus, pour élèves, étudiants et professionnels.
Calculateur de Pourcentage
Calculez un pourcentage d'un nombre, quel pourcentage un nombre représente d'un autre, ou la variation en pourcentage entre deux valeurs.
Percentage Increase Calculator
Calculate percentage increase between two values with the standard formula, a worked step-by-step example, and the absolute difference shown alongside.
Percentage Decrease Calculator
Calculate percentage decrease between two values with the standard formula, a worked example, and the absolute difference shown alongside the result.
Fraction Calculator
Add, subtract, multiply and divide fractions with automatically simplified results, the decimal equivalent, and step-by-step formulas for each operation.
Decimal to Fraction Calculator
Convert any terminating decimal to a simplified fraction with the place-value method, plus the equivalent percentage. Example: 0.625 = 5/8 = 62.5%.
Ratio Calculator
Simplify a ratio to lowest terms, express it in 1:n form, and scale it to a new first term. Example: 4:6 simplifies to 2:3 and scales to 10:15.
Average Calculator
Calculate the average (arithmetic mean) of a list of numbers, with the sum, count, minimum and maximum shown alongside. Includes a worked example.
Scientific Calculator
Free online scientific calculator: trig in radians or degrees, roots, logs, exponents, constants pi and e — evaluated with a safe whitelist expression parser.