Drake Equation for Love Calculator (how many potential partners?)

Understanding the Drake equation dating calculator — concept and principle

This light-hearted calculator borrows the Drake equation from astronomy to estimate how many potential partners might suit you, by narrowing a population step by step with your own percentages. It is a fun way to see how quickly filters add up, not a statistic.

Filters, one after another: with the default inputs the result is 367 people (1 in 138,889).

How it is calculated

N = population × f₁ × f₂ × … × f₈, where each f is a percentage ÷ 100:

of the gender you are interested in
in your age range
living near you
single
sharing your education or interests
whom you find attractive
who would find you attractive too
whom you would actually get along with

The calculator shows the number left after each step and "one in every" = population ÷ N.

The principle

Frank Drake estimated the number of communicating civilisations in our galaxy by multiplying a star-formation rate by a chain of fractions: stars with planets, planets that could support life, and so on. Each fraction narrows what is left by the step before. In 2010 Peter Backus applied the same idea to finding a girlfriend in London. Multiplying many fractions makes the result shrink fast: eight filters that each keep a modest share can leave only a few hundred people from millions. The method assumes the filters are independent, which real life is not.

Worked example

Default inputs: population 51,000,000; 50%, 15%, 20%, 40%, 30%, 20%, 20%, 10%.

After gender: 51,000,000 × 0.5 = 25,500,000; after age range × 0.15 = 3,825,000.
After nearby × 0.2 = 765,000; after single × 0.4 = 306,000.
After interests × 0.3 = 91,800; after you find them attractive × 0.2 = 18,360.
After they find you attractive × 0.2 = 3,672; after getting along × 0.1 = 367.2.
Potential partners = 367, one in every 51,000,000 ÷ 367.2 = 138,889 people.

Each point is the calculator re-run with only “Population of your country or region” changed; the gold point is the default example. Change the inputs above and this chart follows your numbers.

Population of your country or region	Potential partners
1.28e+07	92
2.55e+07	184
3.82e+07	275
5.1e+07	367
6.38e+07	459
7.65e+07	551
1.02e+08	734

How to read the result

The final number depends heavily on the percentages you choose, and the default ones are only example guesses. Watch which steps cut the most: loosening a strict filter often matters more than anything else. A small number is not bad news; you only need one match, and real meetings come through friends, work and shared activities rather than random draws.

Common mistakes

Treating the example percentages as data.
Applying a percentage to the whole population instead of to the group left.
Double-counting filters that overlap, such as age and being single.
Taking the result seriously.

Keep in mind: This is entertainment. People are not independent random draws, and the result says nothing about your chances of finding a partner.

Frequently asked questions

What is the Drake equation?

Frank Drake's 1961 formula for estimating communicating civilisations in the galaxy by multiplying a rate by a chain of fractions.

Who first used it for dating?

Economist Peter Backus, in a 2010 essay about finding a girlfriend in London.

Why is my number so small?

Multiplying many fractions shrinks a population quickly. Try loosening one filter to see the effect.

Sources: F. D. Drake, the Drake equation (1961 Green Bank meeting), as described by the SETI Institute · P. Backus (2010), "Why I don't have a girlfriend: An application of the Drake Equation to love in the UK"

Checked 9 Nov 2026. Idea after Peter Backus’s 2010 essay applying the Drake equation to finding a partner; the structure follows the Drake equation (see our Drake Equation Calculator). All percentages are example values.

Your numbers