“Basado en” is the closest match, and “según” fits when you mean “according to” a source, rule, or person.
You’ll run into “based on” in essays, homework prompts, research notes, and everyday messages. Spanish has a few natural ways to say it, and the best pick depends on what you’re pointing to: a source, a rule, a set of data, or a starting point.
This article gives you the translations you’ll actually see, shows when each one fits, and helps you avoid wording that can sound off in school writing.
What ‘Based On’ Usually Means In English
In English, “based on” does more than one job. Spanish often uses different wording for each job, so it helps to name the job before you translate it.
- Source or authority: based on a report, a law, a rule, a rubric.
- Evidence or data: based on results, statistics, findings, observations.
- Foundation for a work: a movie based on a book, a story based on real events.
- Starting point for a plan: based on your schedule, based on what you told me.
Once you know which meaning you need, the Spanish choice gets easy.
How To Say ‘Based On’ In Spanish In Formal Writing
For essays, reports, and school tasks, basado en is the closest, cleanest match when you mean “founded on” or “grounded in.” It links your claim to a base: a source, evidence, or a text.
Use it with nouns and noun phrases:
- Basado en los datos, el equipo cambió el plan.
- Basado en la lectura, escribe tu respuesta.
- El informe está basado en entrevistas y encuestas.
Agreement With Basado And Basada
“Basado” works like an adjective, so it matches what it describes. That’s why you’ll see basada with feminine nouns and basados/basadas with plurals.
- Una teoría basada en evidencia.
- Un argumento basado en el texto.
- Conclusiones basadas en datos.
If you’re unsure what it modifies, read the noun right next to it. That noun usually tells you the form you need.
Con Base En And En Base A
You may also see con base en. It often appears in formal Spanish and works like “based on” when you mean “with a basis in.” It stays steady because “base” does not change form.
- Con base en los resultados, propusieron cambios.
- Con base en el texto, responde las preguntas.
You’ll also run into en base a. People say it, and you’ll spot it online, yet many teachers treat it as sloppy in school writing. If you want a safer, polished option, stick with basado en or con base en.
Saying ‘Based On’ In Spanish For “According To” Meanings
When “based on” really means “according to,” Spanish often chooses según. It’s short and points to a source, a person, or a rule.
- Según el informe, las ventas subieron.
- Según la ley, necesitas una firma.
- Según mi profe, la tesis va al final del párrafo.
Notice the feel: “según” is great for reporting what someone or something says. It’s less “built from” and more “as stated by.”
De Acuerdo Con As A Close Cousin
De acuerdo con also maps to “according to.” It can sound a touch more formal than “según” and fits well in writing.
- De acuerdo con el reglamento, no se permite comida.
- De acuerdo con los datos, el error fue mínimo.
If your sentence feels like a citation, “según” or “de acuerdo con” often beats “basado en.”
Choosing The Right Option By Context
If you only memorize one translation, make it basado en. Then add según for “according to.” After that, build a small set of options tied to school and work tasks.
When You’re Building A Claim From Evidence
Use basado en or con base en when your claim comes from evidence you used to reach a conclusion.
- Mi conclusión está basada en tres fuentes.
- Con base en las encuestas, el grupo prefirió la opción A.
When You’re Referring To A Rule Or Instruction
If a rule tells you what to do, “según” often sounds natural. If you want a “rules-built” meaning, “basado en” can also fit.
- Según las instrucciones, entrega el trabajo el lunes.
- Un sistema basado en reglas claras.
When A Book, Film, Or Story Uses Another Work As Its Base
For “based on a book” or “based on real events,” Spanish commonly uses basado en.
- Una película basada en una novela.
- Una historia basada en hechos reales.
When You Mean “Starting From” A Point
English uses “based on” in places where Spanish leans toward “starting from” or “from.” In those cases, a partir de can fit better than “basado en.”
- A partir de tus respuestas, armé una lista de temas.
- El cálculo se hace a partir de la medida inicial.
Quick Comparison Table For Students
This table compresses common “based on” situations and the Spanish phrase that matches the meaning.
| English Use Of “Based On” | Spanish Option | When It Fits |
|---|---|---|
| Based on the data… | Basado en / Con base en | Your claim comes from results or evidence. |
| Based on the reading… | Basado en / Con base en | Your answer uses the text as the base. |
| Based on the report… | Según / De acuerdo con | You are reporting what a source says. |
| Based on the rules… | Según / Basado en | “Según” for citation; “basado en” for a rules-built system. |
| A movie based on a book | Basado en | The story takes its foundation from another work. |
| Based on real events | Basado en | Standard phrasing for “real events” contexts. |
| Based on your answers… | A partir de / Según | “A partir de” for a starting point; “según” for “by what you said.” |
| Based on what we know… | Según lo que sabemos / Con base en | “Según” for reporting; “con base en” for evidence style. |
How To Build Natural Sentences With Each Phrase
Use these patterns as sentence molds. Swap the noun phrase at the end, and keep the rest.
Basado En Patterns
- Está basado en + sustantivo: Está basado en evidencia científica.
- Basado en + sustantivo, + oración: Basado en los datos, cambiamos el enfoque.
- Sustantivo + basado en + sustantivo: Un programa basado en proyectos.
Con Base En Patterns
- Con base en + sustantivo, + oración: Con base en el informe, redacté el resumen.
- Verbo + con base en + sustantivo: Decidimos con base en los resultados.
Según Patterns
- Según + sustantivo, + oración: Según el reglamento, hay que registrarse.
- Según + persona: Según Ana, la tarea va en pareja.
De Acuerdo Con Patterns
- De acuerdo con + sustantivo, + oración: De acuerdo con el estudio, el cambio fue pequeño.
A Partir De Patterns
- A partir de + sustantivo, + verbo: A partir de tus notas, escribirás el borrador.
- Cálculo + a partir de + dato: La fórmula se obtiene a partir de dos valores.
Common Mistakes And How To Fix Them
Most errors come from using one phrase for every meaning. Use these quick fixes.
Mistake 1: Using “Basado En” When You Mean “According To”
If your sentence is a citation, “según” often sounds tighter.
- Off: Basado en el profesor, el examen será el viernes.
- Better: Según el profesor, el examen será el viernes.
Mistake 2: Forgetting Agreement With Basado
Match the word to what it describes.
- Una decisión basada en datos.
- Un informe basado en entrevistas.
- Ideas basadas en la lectura.
Mistake 3: Translating Word-By-Word In Set Phrases
English “based on” can hide a “starting point” meaning. If you mean “from,” “a partir de” often fits.
- Off: Basado en tu edad, calcula el resultado.
- Better: A partir de tu edad, calcula el resultado.
Mistake 4: Mixing Citation Tone With Evidence Tone
“Según” points to what a source says. “Basado en” points to what your work uses as its base. If you keep that split in mind, your sentences sound natural.
Mini Practice: Translate These Sentences
Try these, then check the model answers. Write them out once. You’ll start to feel the pattern.
- Based on the text, answer in complete sentences.
- Based on the report, the team changed the plan.
- A film based on a true story.
- Based on your notes, write a short summary.
- Based on the rules, phones are not allowed.
Model Answers
- Basado en el texto, responde con oraciones completas.
- Según el informe, el equipo cambió el plan.
- Una película basada en una historia real.
- A partir de tus apuntes, escribe un resumen corto.
- Según las reglas, no se permiten teléfonos.
Second Table: Fast Sentence Starters You Can Reuse
Use these starters in assignments to keep your writing clear. Swap the ending to fit your topic.
| Starter | Best For | Swap In |
|---|---|---|
| Basado en… | Evidence-based claims | los datos / la lectura / las entrevistas |
| Con base en… | Formal report tone | los resultados / el análisis / el informe |
| Según… | Citations and rules | el estudio / la ley / el reglamento |
| De acuerdo con… | Academic “according to” | el documento / la fuente / el autor |
| A partir de… | Starting point logic | tus notas / la medida / el dato inicial |
| Está basado en… | Description of a work | una novela / hechos reales / un caso |
| Una idea basada en… | Thesis lines | la evidencia / el texto / el argumento |
A Simple Rule To Choose Fast
If you need a quick pick during a test, use this three-part rule.
- If you mean built from evidence or a text: choose basado en (or con base en).
- If you mean according to a source or rule: choose según (or de acuerdo con).
- If you mean starting from a data point or input: choose a partir de.
Three meanings, three picks. Once you spot the meaning in your English sentence, the Spanish phrasing falls into place.
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