Gráfico vs. gráfica vs. diagrama
The Spanish words gráfico, gráfica, and diagrama all translate to "chart" or "graph" in English, but they have subtle regional preferences and specific use cases in data visualization. While gráfico and gráfica are mostly interchangeable representations of numerical data, diagrama is typically reserved for charts that show structures, relationships, logic, or processes.
Gráfico
The word gráfico is a masculine noun broadly used to describe any visual representation of numerical or statistical data, such as bar charts or pie charts. It is the standard and most commonly used term in Spain, though it is perfectly understood universally across all Spanish-speaking regions.
El gráfico de barras muestra un aumento en las ventas de este trimestre.
(The bar chart shows an increase in sales for this quarter.)
Necesitamos actualizar el gráfico circular con los datos más recientes.
(We need to update the pie chart with the most recent data.)
El investigador presentó un gráfico que ilustra el crecimiento de la población.
(The researcher presented a graph illustrating population growth.)
Este gráfico interactivo permite al usuario filtrar la información por año.
(This interactive chart allows the user to filter the information by year.)
Añade un gráfico de líneas a la presentación para comparar los ingresos anuales.
(Add a line chart to the presentation to compare annual revenues.)
Gráfica
The word gráfica is the feminine equivalent of gráfico and is used to mean the exact same thing, especially in Latin America where it is highly preferred in everyday business and media. Additionally, gráfica is often the preferred term in mathematical contexts when referring to the plotted curve of a function or equation on coordinate axes.
La gráfica de pastel indica que la mayoría de los encuestados prefiere el verano.
(The pie chart indicates that the majority of respondents prefer summer.)
En la clase de cálculo trazamos la gráfica de una ecuación cuadrática.
(In calculus class we plotted the graph of a quadratic equation.)
Según esta gráfica, la tasa de desempleo ha disminuido significativamente.
(According to this graph, the unemployment rate has decreased significantly.)
Por favor, revisa la gráfica de temperatura diaria antes de publicar el reporte del clima.
(Please review the daily temperature chart before publishing the weather report.)
La gráfica financiera refleja una caída repentina en el valor de las acciones de la compañía.
(The financial chart reflects a sudden drop in the value of the company's stocks.)
Diagrama
The word diagrama translates closer to "diagram" and is used for charts that represent logic, structures, workflows, or qualitative relationships rather than pure numerical plotting. It is commonly used for flowcharts, Venn diagrams, network maps, and scatter plots.
El ingeniero diseñó un diagrama de flujo para explicar el nuevo proceso de ensamblaje.
(The engineer designed a flowchart to explain the new assembly process.)
Usamos un diagrama de Venn para comparar visualmente las similitudes entre ambas teorías.
(We used a Venn diagram to visually compare the similarities between both theories.)
El diagrama de dispersión ayuda a identificar si hay correlación entre estas dos variables.
(The scatter plot helps identify if there is a correlation between these two variables.)
Recursos humanos dibujó un diagrama de árbol para mostrar la jerarquía de la empresa.
(Human resources drew a tree diagram to show the hierarchy of the company.)
El diagrama de Gantt es esencial para gestionar los tiempos y entregas de nuestro proyecto.
(The Gantt chart is essential for managing the timeline and deliverables of our project.)
Summary
In summary, gráfico and gráfica are mostly synonymous terms for statistical or numerical charts, with gráfico being preferred in Spain and gráfica being the dominant choice in Latin America and in pure mathematics. On the other hand, diagrama is used for structural or logical charts that illustrate processes, relationships, or systems, such as flowcharts and network diagrams.