Fact Sheet | Product Estimation Questions for Product Management

Phone

1. Worldwide Android market share: 75%
2. US Android market share: 40%

Cars

1. Avg. life span of a car: 10 years
2. Avg. life span of a tire: 6 years

Measurements

1. 1 inch = 2.5 centimeters
2. 1 foot = 12 inches
3. 1 gallon of water = 4 liters
4. 1 Ton = 1000 kgs

Geographical facts

1. Population of San Francisco = 1 million
2. Size of San Francisco = 7 miles by 7 miles
3. Area of the US = 3.79 square miles

Population facts

1. % of the US with health insurance = 90%
2. Population of the US = 300 million
3. Population of New York = 8.5 million
4. World population = 7 billion
5. % of population with internet = 40%
6. Asia population = 4 billion

Formula

1. Area of a triangle: ½ * base * height
2. Surface area of a sphere: 4 * pi * radius squared

Ads

1. Click through rate of display ads: .10%
2. Average revenue per user for Facebook: $4

Internet penetration

1. Globally: 60%
2. US: 90%

Life expectancy

1. US: 80 years
2. World: 65 to 70 years

Households

1. Number of households in the US = ~100 million
2. Avg. Number of people per household = 3
3. Avg. number of children in families with children = 2

File Size

1. 1 email = 1 MB
2. 1 photo= 2.5 MB
3. 1 small video= 60 MB

Storage in the cloud

1. $ .02 per GB per month

This factsheet contains useful numbers for answering product estimation questions. While answering estimation questions, we often have to use facts such as number of households in the US or the number of internet users. We will continuously update the factsheet to provide relevant information.