Counts to Rates: Per Person, Per 1,000, Per Mile

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Opens on Chapter 5’s example: library loans in Ashford (410,000 people) and Fernhill (12,000).

Name

Count

Size (people, miles…)

Name

Count

Size (people, miles…)

Name

Count

Size (people, miles…)

Name

Count

Size (people, miles…)

Name

Count

Size (people, miles…)

Per

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Enter your numbers, then press Calculate.

How it works

A rate is the count divided by the size, times whatever makes it easy to say (per 1,000 people, per 100 miles). The ranking by count and the ranking by rate can be opposites: the biggest place usually has the biggest count. Pick the size that matches your question, and plan with totals.

From the book, Chapter 5. Ashford lends 3.0 books a person and Fernhill 4.5. Potholes: Millbrook 10 per 1,000 people, Ashford 7. Route A has 0.5 flats per 100 miles and route B 1.0; per ride it’s 0.15 against 0.04. Every chapter and its calculator →

Rounding is half up, the way the book rounds. Numbers can be typed as 1,450, $38, 12% or 2.5 million. Everything stays in your browser: no sign-up, nothing stored or sent.