Ratio To Percentage Calculator

Work out ratio to percentage instantly with clear inputs, formula shown and shareable results.

About Ratio To Percentage Calculator

To turn a ratio into percentages, divide each part by the sum of all parts and multiply by 100. That is different from expressing one part as a percentage of the other, which divides by that part instead.

Formulas

Percentage of total

a% = 100a / (a + b)

a as a percentage of b

100a / b

Worked example

With the default values below, Ratio To Percentage Calculator returns First part of 40.0000. Change any input above and every figure here is recalculated in your browser.

Inputs used

First partminimum 0: 2
Second partminimum 0: 3

Results

First part: 40.0000 %
Second part: 60.0000 %
First as a percentage of the second: 66.6667 %
Total parts: 5.0000

Step by step

1Values used
2Percentage of total
3a as a percentage of b
4First part= 40.0000 %
5Second part= 60.0000 %
6First as a percentage of the second= 66.6667 %
7Total parts= 5.0000

Assumptions and limits

The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

For 2 : 3?

40% and 60% of the total, while 2 is 66.6667% of 3.

Do the percentages always add to 100?

Yes when you divide by the total. The 'a as a percentage of b' figure does not belong to that sum.