Percentage Calculator
The five most needed percentage calculations in one place: percent of a number, percentage share, percentage change, and increase or decrease by a percent. The result is computed as you type.
How to use this page
- Fill in the fields in the form above — the result recomputes at once, with no page reload.
- Under the result you will find the interpretation scale, if the calculator has one: it says which range your value fell into.
- The formula we use is shown lower on this page — you can check the arithmetic yourself.
- To compute the same for another game or variant, change it in the select field — prices and pools update automatically.
What this page does not do: It does not point to numbers to play and does not predict a draw — every draw is independent of the previous ones.
Further reading
A percentage is a fraction with a denominator of one hundred. This calculator answers five practical questions: a percentage of a number, what percentage one value is of another, percentage change, and the result after increasing or decreasing a value by a percentage. Each mode uses its own formula and result unit.
For example, 23% of 1500 is 345, while increasing 1500 by 23% gives 1845. The value 345 is 23% of 1500. A change from 1500 to 1845 is an increase of 23%, but returning from 1845 to 1500 is a decrease of about 18.7%, because the base value is different.
The calculator supports all five variants shown in the list. Results are displayed to hundredths. For tax calculations, check the rounding rules that apply to the particular settlement — a small difference does not necessarily mean the calculator is wrong.
Frequently asked questions
How much is 23% of 1500 zl?
345 zl. You multiply 1500 by 23 and divide by 100. The gross amount after adding VAT is 1845 zl.
Why don't an increase of 20% and a decrease of 20% return to the starting point?
Because the base is different. 100 zl after a 20% increase is 120 zl, and 120 zl after a 20% decrease is 96 zl, which is 4 zl less than the starting point. To go back from 120 to 100, you need to decrease by 16.67%.
How do I calculate the net amount, knowing the gross amount and a 23% rate?
You divide the gross amount by 1.23. For 1845 zl gross, this gives exactly 1500 zl net, and the tax itself is 345 zl.
What is the difference between a percentage point and a percent?
An increase from 4% to 5% is an increase of 1 percentage point, but as much as 25 percent. These are two different measures and they are often confused in texts about interest rates.
See also
Arithmetic Mean
Enter numbers separated by commas and calculate the arithmetic mean online. The calculator will give you the s
Combinations, variations and permutations
Calculate the number of combinations, variations and permutations of n elements taken k at a time. Combinatori
Geometric mean
Calculate the geometric mean of any number of values. The n-th root of the product. Useful for rates of return