QUICK ANSWER
"Look on" is a transitive verb phrase which is often translated as "considerar", and "look at" is a transitive verb phrase which is often translated as "mirar". Learn more about the difference between "look on" and "look at" below.
look on(
look
an
)A transitive verb phrase is a phrase that combines a verb with a preposition or other particle and requires a direct object (e.g., take out the trash.).
1. (to view)
a. considerar
She looked on him more as a brother than a love interest.Lo consideraba más un hermano que alguien de quien pudiera enamorarse.
b. mirar
We were looked on as second-class citizens when we moved into the town.Nos miraron como ciudadanos de segunda fila cuando nos mudamos al pueblo.
An intransitive verb phrase is a phrase that combines a verb with a preposition or other particle and does not require a direct object (e.g., Everybody please stand up.).
2. (to observe)
a. mirar
A crowd of schoolchildren was looking on as the two boys fought.Una multitud de colegiales miraba mientras se peleaban los dos chicos.
a. compartir
We don't have any more copies of the packet; can you look on with someone?No tenemos más ejemplares del folleto; ¿puedes compartir con alguien?
look at(
look
aht
)A transitive verb phrase is a phrase that combines a verb with a preposition or other particle and requires a direct object (e.g., take out the trash.).
1. (to observe)
a. considerar
We plan to look at three options before making a decision.Planeamos considerar tres opciones antes de tomar una decisión.
b. estudiar
You'll need to look at the problem from different points of view in order to come up with the best solution.Tendrás que estudiar el problema desde diferentes puntos de vista con el fin de llegar a la mejor solución.
c. enfocar
Did you do well in the contest? - That depends on how you look at it.¿Tuviste éxito en el concurso? - Eso depende de cómo lo enfocas.
d. mirar
You should look at the problem from her point of view.Deberías mirar el problema desde su perspectiva.
3. (to check)
a. calcular
How much does it cost to study here? - You're looking at close to $10,000 pesos per month on average.¿Cuánto cuesta estudiar aquí? - Calculo que será cerca de $10,000 pesos por mes en promedio.
