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    Exponent Calculator

    Calculate powers and exponents with this free online exponent calculator: exact big numbers like 2^100, negative exponents as fractions and fractional powers.

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    Free, no sign-up, works in the browser — send it to a friend or add it to your site.

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    How to use Exponent Calculator

    1. 1Enter the base (any number, including negatives and decimals)
    2. 2Enter the exponent — a whole number, a negative number, a decimal or a fraction like 1/3
    3. 3Read the exact result (every digit for whole-number powers) and copy it

    Frequently asked questions

    What does a negative exponent mean?▾

    It's the reciprocal: a⁻ⁿ = 1 / aⁿ. So 10⁻³ = 1/1000 = 0.001 and 2⁻⁴ = 1/16.

    What is a fractional exponent?▾

    A root: a^(1/n) is the nth root and a^(m/n) is the nth root raised to the m. 27^(1/3) = 3 and 8^(2/3) = 4.

    Why is anything to the power of 0 equal to 1?▾

    Because aⁿ ÷ aⁿ = a⁰ and anything divided by itself is 1 (for a ≠ 0). 0⁰ is conventionally taken as 1 in most calculators.

    How big is 2 to the power of 100?▾

    2¹⁰⁰ = 1,267,650,600,228,229,401,496,703,205,376 — 31 digits. Whole-number powers are computed exactly, digit for digit.

    Embed Exponent Calculator on your website▾

    Paste this snippet into your page. The embedded tool runs in your visitor's browser and shows a small “Powered by clkr.work” link.