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SocQ

Free Percentage Calculator

Work out X% of Y, what percent X is of Y, or the total when you know a part and its percentage.

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How to use this tool

Percentages come up everywhere: discounts, commissions, engagement rates, test scores and survey results. Pick the question you need to answer, type two numbers and the result appears instantly with the exact calculation underneath, so you can check it or explain it to someone else.

  1. 01

    Choose the question

    Pick what is X% of Y, X is what % of Y, or X is Y% of what. Only the two fields you need are shown.

  2. 02

    Enter two numbers

    Type the values. The result updates as you type, and decimals are fine.

  3. 03

    Read and copy

    See the answer with its formula, such as 15 ÷ 100 × 200, and press Copy to paste both into a message or report.

The three percentage formulas

• X% of Y: part = X ÷ 100 × Y. Example: 15% of 200 = 30. • X is what percent of Y: percent = X ÷ Y × 100. Example: 30 is 15% of 200. • X is Y% of what: total = X ÷ (Y ÷ 100). Example: 30 is 15% of 200. All three come from the same relationship, part = percent × total ÷ 100, rearranged for the unknown value.

Everyday examples

• Discount: 25% off a $80 jacket is 0.25 × 80 = $20 off. • Commission: a 12% affiliate commission on a $150 sale is $18. • Engagement: 450 interactions from 15,000 followers is 3%. • Score: 42 correct answers out of 50 is 84%.

Percentage change is different

To see how much a number went up or down, such as followers growing from 1,200 to 1,500, use the percentage change calculator. It divides the difference by the original value, which is a different formula from the ones above.

Percent vs percentage points

If a rate moves from 2% to 3%, it rose by 1 percentage point but by 50 percent, because 1 is half of 2. Say “points” when you compare two percentages directly, so readers don’t confuse the two.

Frequently asked questions

How do I calculate a percentage of a number?

Divide the percentage by 100 and multiply by the number. For 15% of 200: 15 ÷ 100 × 200 = 30.

How do I find what percent one number is of another?

Divide the part by the total and multiply by 100. For 30 out of 200: 30 ÷ 200 × 100 = 15%.

How do I find the total from a part and a percentage?

Divide the part by the percentage written as a decimal. If 30 is 15% of a number, the number is 30 ÷ 0.15 = 200.

How do I calculate a discount?

Use “What is X% of Y” with the discount as X and the price as Y to get the amount off, then subtract it from the price. 20% off $50 is $10 off, so you pay $40.

Can the percentage be more than 100?

Yes. 150% of 40 is 60, and 60 is 150% of 40. A part can be larger than the total when you compare growth or targets.

Can I use decimals and negative numbers?

Yes. Enter values such as 2.5, 1249.99 or −15 (type numbers without thousands separators). −15% of 200 is −30, and results are shown to up to three decimal places.

How do I calculate percentage increase?

Use the percentage change calculator: (new − original) ÷ original × 100. Going from 1,200 to 1,500 is a 25% increase.

What does percent mean?

Percent means “per hundred”. 15% is 15 out of every 100, which is the fraction 15/100 or the decimal 0.15.

Are my numbers stored?

No. The calculation runs in your browser and the numbers aren’t sent to SocQ or saved.

Is the percentage calculator free?

Yes. It’s free with no signup and no limit.

For developers

Turn public social data into percentages

Engagement rate, comment share and growth are all percentages of public numbers. SocQ APIs return public Instagram posts, profiles, Reels and comments with their counts, so you can calculate these rates for many accounts at once.

Explore the API

instagram/posts

posts0.34 credits / result

instagram/profiles

profiles0.6 credits / result

instagram/reels

posts0.52 credits / result

instagram/comments

comments0.3 credits / result

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