What does the Exponent / Power Calculator do?

Calculate any number raised to any power. See common powers of your base number. All calculations are performed in your browser using official UK rates and thresholds.

How accurate are the results?

This calculator uses standard mathematical algorithms and provides results accurate to the precision shown. For very large numbers or high-precision requirements, results are rounded to a reasonable number of decimal places.

Can I use this for schoolwork?

Yes. This calculator is suitable for GCSE, A-level and university-level mathematics. It follows standard mathematical conventions used in UK education.

Exponent / Power Calculator

Calculate any number raised to any power. See common powers of your base number.

Last updated: April 2026 · Source: BBC Bitesize — Powers and roots

^=1,024

Powers of 2

2²

2³

2⁴

2⁵

2¹⁰

1,024

2^-1

0.5

2^-2

0.25

2^0.5

1.4142135624

Disclaimer

This calculator is provided for informational purposes only and should not be considered as financial or tax advice. All calculations are performed locally in your browser — no personal data is collected or sent to our servers. Rates and thresholds are sourced from HMRC and GOV.UK and are updated for the current tax year. Always verify results with HMRC or consult a qualified professional before making financial decisions.

How It Works

Exponents (powers) represent repeated multiplication. The expression a^n means multiplying a by itself n times. This calculator handles positive, negative and fractional exponents as well as expressions involving multiple operations.

Negative exponents produce reciprocals: a^(−n) = 1/a^n. Fractional exponents represent roots: a^(1/2) is the square root of a, and a^(1/3) is the cube root. The calculator shows full step-by-step working so you can follow the logic.

Example: Calculating 5^4

5^4 = 5 × 5 × 5 × 5
= 25 × 25
= 625

Source: BBC Bitesize — Powers and roots

Frequently Asked Questions

What does the Exponent / Power Calculator do?: Calculate any number raised to any power. See common powers of your base number. All calculations are performed in your browser using official UK rates and thresholds.
How accurate are the results?: This calculator uses standard mathematical algorithms and provides results accurate to the precision shown. For very large numbers or high-precision requirements, results are rounded to a reasonable number of decimal places.
Can I use this for schoolwork?: Yes. This calculator is suitable for GCSE, A-level and university-level mathematics. It follows standard mathematical conventions used in UK education.