← All calculators

Percentage calculator

Percentage

Four everyday percent modes. Instant results — no tracking.

Runs in your browser. Numbers stay on this device — nothing is uploaded to BrowserSpaces for processing.

Four modes

Of, change, is-of, reverse.

Clear labels

Know which number is which.

Copyable

Grab the answer quickly.

Use the calculator

20% of 150

30

How it works

How percentages work here

Each mode uses a different rearrangement of part = percent × whole. Reverse mode finds the whole when you know the part and percent.

Three steps

  1. 1

    Pick mode

    Match the question you’re asking.

  2. 2

    Enter values

    Two numbers.

  3. 3

    Read result

    Answer updates live.