Classify demographic transition stages from crude birth and death rates: get the natural increase rate, the doubling time, the DTM stage (1-5), and the data point plotted on the model diagram.
Loading DTM stage diagram...
The Demographic Transition Model Stage Diagram turns a pair of crude rates into a full DTM read-out. Enter a crude birth rate and a crude death rate, or pick one of 15 country presets, and see the natural increase per 1,000 people, the percent growth rate, the rule-of-70 doubling or halving time, and the matched stage from 1 (High Stationary) to 5 (Declining).
The result is plotted on the classic five-band demographic transition diagram, with the matched stage highlighted and the birth and death rates marked on the model's birth, death and total-population curves. Every classification prints the exact rule that fired, so the answer can be checked by hand.
Stage 1 (High Stationary) has high births and high deaths, Stage 2 (Early Expanding) has falling deaths and still-high births, Stage 3 (Late Expanding) has falling births, Stage 4 (Low Stationary) has low births and low deaths, and Stage 5 (Declining) has births below deaths so the population shrinks.
Subtract the crude death rate from the crude birth rate to get the natural increase per 1,000 people, then divide by 10 to express it as a percent. A country with a CBR of 44.4 and a CDR of 8.0 has a natural increase of 36.4 per 1,000, or 3.64% a year.
The rule of 70 estimates a doubling time by dividing 70 by the annual percent growth rate. At 3.64% a year a population doubles in about 19.2 years. When growth is negative the same formula gives a halving time instead.
None. Stage 1 describes pre-industrial societies, so this tool's Stage 1 presets are historical reconstructions such as England and Wales around 1750. Every present-day country sits in Stage 2 through Stage 5.
QuizWhiz is an AI quiz generator: upload a PDF, paste your notes, or link an article and get a graded practice quiz with explanations in seconds.