Reapportionment Calculator

Calculate seat distribution based on population or votes using various apportionment methods

State/Population Data

State Name
Population
Actions

Apportionment Results

Total Population
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Average per Seat
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Remainder Seats
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Primary Method Results

State Population Quota Seats Change

How Reapportionment Works

Reapportionment is the process of distributing seats in a legislative body among constituencies based on population. Different mathematical methods can produce different results:

Jefferson Method

Uses a divisor that is adjusted downward until the total seats equal the target. Tends to favor larger states.

Webster Method

Uses a divisor that rounds quotas to the nearest whole number. Considered more neutral than other methods.

Huntington-Hill Method

Currently used for U.S. House of Representatives. Uses a geometric mean for rounding that minimizes relative differences.

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