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# Estimation - Number of ATMs in India

### Product Management Interview: Guess estimate the total number of ATMs in India

**Known:** The population of India - **1.3 Billion**

**Assumption -** Let the **Rural : Urban split be 70 : 30 %** of the total population.

**Population Split - **

Therefore, the population split *approximately* comes to,

**Rural = 900 Million**

**Urban = 400 Million**

**Household Split - **

Next, we will calculate the number of Households in India,

**Assuming**, there are **4 people in a household** for both urban and rural,

*(Ideally, we would assume, 3 for Urban and 5 for Rural)*

Household split come to,

**Rural = (900 Million / 4) = 230 Million**

**Urban = (400 Million / 4) = 100 Million**

**Total number of ATM cardholders in India - **

Next, letâ€™s estimate the total number of ATM cardholders in India,

Assuming,

70% of Rural household has ATM cards and,

90% of Urban Households has ATM cards

This comes down to, (70% of 230 Million)

= **160 Million ATM cards in Rural** and (90% of 100 Million)

= **90 Million ATM cards in Urban**.

Now, letâ€™s assume -

In Urban, let say 10% of household has 2 ATMs and rest of the 90% has 1 ATM,

= (10% * 90M)*2 + (90% * 90M)*1= 18 + 81 M = ~ 100M ATM users

In Rural, let say 100% of household has 1 ATMs,

= (100% * 160M)*1 = 160 M ATM users

**Now Assuming, **

**1 ATM **is mapped to** ~500 **users in the** Urban **area**, & ~2000 **users in** Rural **area

**Total number of ATMs in Urban + Rural India = **

= 100M/500 + 160M/2000

= 2,00,000 + 80,000

= **2,80,000 ATMs are there in India.**

The actual number of ATMs in India is around ~2,40,000

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## Estimation - Number of ATMs in India

There is an error in the line "In Rural, let say 10% of household has 1 ATMs", instead of 10% it should say 100%.