Calculadora de Potência
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
r = base^expoente
About this calculator
The Power Calculator is a free online tool that calculates the result of a base raised to an exponent. Simply enter the base and exponent, and the calculator returns the power value. Ideal for students, professionals, and anyone needing to perform this calculation quickly and accurately, without manual errors.
The operation is simple: the calculator uses the mathematical formula r = base^exponent, where 'base' is the number multiplied by itself and 'exponent' indicates how many times the multiplication occurs. For example, 2^3 results in 2 x 2 x 2 = 8. The tool supports integer, fractional, and negative exponents, providing exact results.
Use this calculator in situations such as solving school math problems, calculating compound interest (where the exponent represents the number of periods), determining areas of geometric figures with powers, or in physics and engineering applications. It is useful whenever you need a power quickly and confidently.
Cautions: remember that negative exponents generate fractions (e.g., 2^-3 = 1/8). Fractional exponents represent roots (e.g., 9^(1/2) = √9 = 3). The calculator does not handle complex bases or exponents. Verify that the entered values are correct, especially in contexts where the result can be very large or very small.
Frequently asked questions
How do I calculate power with a negative exponent?
For a negative exponent, the result is the reciprocal of the base raised to the positive exponent. For example, 2^-3 = 1/(2^3) = 1/8.
Does the calculator accept fractional exponents?
Yes, fractional exponents are interpreted as roots. For example, 8^(1/3) equals the cube root of 8, which is 2.
What is the difference between power and multiplication?
Power is repeated multiplication of the base by itself according to the exponent. For example, 3^4 is 3 x 3 x 3 x 3, while multiplication 3 x 4 is 3+3+3+3.
Can I use the calculator for very large numbers?
Yes, but depending on the size, the result may be displayed in scientific notation. The calculator returns the value with limited precision based on system capacity.