Spanish Fractions, Measurements, and Everyday Quantities
Spanish Fractions, Measurements, and Everyday Quantities
In this lesson, you will understand and state common everyday fractions, weights, volumes, lengths, and quantities. Keep every number connected to its unit, and do not assume that different units are equivalent.
Half: medio and media
When medio means half before a noun, it agrees with the noun.
- — half a kilogram
- — half a liter
- — half an hour
- — half a tablet
Quarter: un cuarto
- — a quarter of a kilogram
- — a quarter of a liter
- — a quarter of an hour
Use de before the measured noun in these quarter expressions.
One and a half
- — one and a half kilograms
- — one and a half liters
- — one and a half hours
Notice the agreement in because hora is feminine.
Common weight units
- — one gram
- — one hundred grams
- — one kilogram
- — half a kilogram
Common volume units
- — one milliliter
- — five milliliters
- — one liter
- — half a liter
Common length units
- — one centimeter
- — ten centimeters
- — one meter
- — two meters
Read the whole quantity
Do not separate the number from the unit.
- — 250 grams
- — 500 milliliters
- — 2 meters
Whole number versus fraction
Compare:
- — one kilogram
- — half a kilogram
- — one and a half kilograms
- — a quarter of a kilogram
Measure food and drink
- — I need half a kilogram of rice.
- — I want one liter of water.
- — I need a quarter kilogram of cheese.
Measure time
- — I study for half an hour.
- — I work for an hour and a half.
- — I wait for a quarter of an hour.
Compare measurements only when the unit supports the comparison
You can compare two quantities expressed in the same unit.
- — 500 grams is more than 250 grams.
- — Two liters is more than one liter.
Do not assume equivalence across different units
Do not claim that a value in grams equals a value in milliliters unless the context gives the necessary conversion. Weight and volume are different measurement categories.
Reading a quantity
Producto A: — Product A: 500 milliliters.
Producto B: — Product B: 1 liter.
You can identify the units and quantities. Do not perform an unstated conversion if the task does not provide or require one.
A practical measurement method
- Read the whole number or fraction.
- Keep the unit attached to the quantity.
- Use medio or media according to the noun when it acts as an adjective.
- Use un cuarto de for a quarter of a measured quantity.
- Separate whole amounts from fractional amounts clearly.
- Compare values directly only when the units make the comparison valid.
- Do not invent a conversion between different measurement types.
From Quantities to Explaining Symptoms and Medication Needs
You can now understand and state common everyday quantities with their correct units. The next lesson combines health vocabulary with allergies, medication information, and precise symptom descriptions.