Description
Return births-deaths, arrivals-departures, and openingPopulation+births-deaths+arrivals-departures+signed reclassification, with other inputs nonnegative.
Population indicators depend on compatible boundaries, time periods, counted groups, and denominator choices. A share or density can change when exclusions or daytime populations change, even without arithmetic error.
Return births-deaths, arrivals-departures, and openingPopulation+births-deaths+arrivals-departures+signed reclassification, with other inputs nonnegative.
When to use this tool
Use Migration Net Flow One Region Balance when you need one transparent population-accounting component.
How to use the tool and how it works
- Enter openingPopulation, births, deaths, arrivals, departures, reclassification. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read naturalChange, netMigration, closingPopulation. Use the output convention below.
Return births-deaths, arrivals-departures, and openingPopulation+births-deaths+arrivals-departures+signed reclassification, with other inputs nonnegative.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| openingPopulation | Opening Population | Required. Finite number; minimum 0. |
| births | Births | Required. Finite number; minimum 0. |
| deaths | Deaths | Required. Finite number; minimum 0. |
| arrivals | Arrivals | Required. Finite number; minimum 0. |
| departures | Departures | Required. Finite number; minimum 0. |
| reclassification | Reclassification | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| naturalChange | Natural Change | Required. Finite number. |
| netMigration | Net Migration | Required. Finite number. |
| closingPopulation | Closing Population | Required. Finite number. |
{
"input": {
"openingPopulation": 1000,
"births": 30,
"deaths": 10,
"arrivals": 50,
"departures": 20,
"reclassification": 5
},
"output": {
"naturalChange": 20,
"netMigration": 30,
"closingPopulation": 1055
}
}Limitations and assumptions
- Counts share one boundary and interval; closingPopulation is not constrained nonnegative, and administrative reclassification is separate from migration.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Review source definitions, geography, temporal alignment, and uncertainty before making a demographic or service-access conclusion.
References
Similar or alternative tools
- Census Area Boundary Population Factor
Subtract transferredOut within oldPopulation and add nonnegative transferredIn for rebasedPopulation.
- Residential Mobility Tenure Month Term
Return month-coordinate tenure and 12 × previousMoves/exposureMonths.