Herramientas Web

Percent change calculator

The “Change” mode is already on: enter the initial and final value to see how much it changed, as a percentage.

Result
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Enter both values to see the result.

How it is calculated

Formula
With your values
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Quick calculators

Fill in any phrase without switching modes. Results show up right away.

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    Step by step

    How to use it

    1. Pick the type of calculation: percent of a number, what percent one value is, increase or decrease, percent change, error, successive percentages, or conversions.
    2. Enter the values in the fields. Use a period for decimals and choose how many decimal places to show.
    3. The result appears right away, with the formula and your values filled in. Copy it with one click.
    4. Use the quick calculators to solve other phrases without switching modes, or copy the link to share the calculation.
    FAQ

    Frequently asked questions

    How is percent change calculated?

    Subtract the initial value from the final one, divide by the initial value (as an absolute value), and multiply by 100. From 200 to 230 it is (230 − 200) ÷ 200 × 100 = +15%.

    What does a negative result mean?

    That the value went down. From 200 to 150 the change is (150 − 200) ÷ 200 × 100 = −25%, a 25% decrease.

    Can I use it to compare prices or salaries?

    Yes. It is the right way to measure how much a price, a salary, or a measurement changed between two points in time, without mixing up the absolute change and the relative one.

    Absolute change and relative change

    Going from 200 to 230 is an absolute increase of 30 and a relative increase of 15%. The two numbers say different things: the relative one depends on the starting point. Going from 1,000 to 1,030 is also up 30, but only 3%.

    Frequent mistakes

    Do not mix up percentage points and percent: a rate that goes from 10% to 12% rises 2 percentage points, but 20% in relative terms. The calculator shows both figures when you use the “Percentage points” mode. If you go up and down by the same percentage you do not get back to the start: 100 → 120 → 96. Go back to the percentage calculator to see the other modes, or try the percentage increase calculator.

    Updated on September 29, 2026