Pints to Quarts
Convert pints (pt) to quarts (qt). Both measure capacity and volume, and the conversion comes up in cooking, chemistry, fuel work.
The Formula
``
quarts = pints × 0.5
pints = quarts × 2
`
One pint is 0.5 quarts, and one quart is 2 pints.
Conversion Table
| Pints | Quarts |
|---|---|
| 1 pt | 0.5 qt |
| 2 pt | 1 qt |
| 5 pt | 2.5 qt |
| 10 pt | 5 qt |
| 25 pt | 12.5 qt |
| 50 pt | 25 qt |
| 100 pt | 50 qt |
| 500 pt | 250 qt |
| 1,000 pt | 500 qt |
The Other Direction
| Quarts | Pints |
|---|---|
| 1 qt | 2 pt |
| 2 qt | 4 pt |
| 5 qt | 10 pt |
| 10 qt | 20 pt |
| 25 qt | 50 pt |
| 50 qt | 100 pt |
| 100 qt | 200 pt |
| 500 qt | 1,000 pt |
| 1,000 qt | 2,000 pt |
What Each Unit Is
Pints (pt) — the US liquid pint: half a quart, or 473.176 millilitres. From the Old French pinte; the US kept the pre-1824 English measure.
Quarts (qt) — a quarter of a US gallon, or 0.946352946 litres. From the Latin quartus, a fourth part of a gallon.
A Sense of Scale
A US pint of beer is 473 mL- A UK pint is 568 mL
- Blood donation takes about a pint
- A US quart is just under a litre
- Ice cream is sold by the quart
- A quart is two pints
Precision
The factor 0.5 is rounded. For engineering work carry more digits than the table above, and round only at the end — rounding at each step compounds.
Watch Out For
- A UK pint is 20% larger than a US pint — 568 mL against 473 mL.
In Code
`javascript
const pintToQuart = (value) => value * 0.5;
``
Where This Conversion Comes Up
- Cooking
- Chemistry
- Fuel
- Beverages
- Medicine
How Many Decimals Do You Need?
Rounding the factor costs accuracy, and how much depends on the factor. Converting 137 pt with the factor truncated at each decimal place:
| Decimals kept | Factor | 137 pt becomes | Error |
|---|---|---|---|
| 0 | 1 | 137 | 100.0000% |
| 1 | 0.5 | 68.5 | — |
| 2 | 0.5 | 68.5 | — |
| 3 | 0.5 | 68.5 | — |
| 4 | 0.5 | 68.5 | — |
The right number of significant figures is set by your input, not by the converter. If you measured pints to three significant figures, the answer in quarts is only good to three — writing more digits claims precision the measurement never had.