# US quarts to Liters (qt to L)

> Convert US quarts to liters: 1 qt = 0.946353 L. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.

- Page id: `quarts-to-liters` · Quantity: Volume (`volume`, base unit L) · Tool: `convert_units`
- Canonical page: https://tttkmbb.com/conversion/quarts-to-liters · This document: https://tttkmbb.com/conversion/quarts-to-liters.md · JSON: https://tttkmbb.com/conversion/quarts-to-liters.json (add `?value=` for a result)

## Formula

- `1 qt = 0.946353 L`
- `liters = US quarts × 0.946352946`
- Reverse: `US quarts = liters × 1.056688209`

The factor follows from the SI definitions of both units (NIST SP 811); values below are rounded to 6 significant figures, the API returns up to 12.

## Worked examples

- 5 qt = 4.73176 L
- 12.5 qt = 11.8294 L
- 100 qt = 94.6353 L

## Conversion table

| US quarts (qt) | Liters (L) |
| --- | --- |
| 1 | 0.946353 |
| 2 | 1.89271 |
| 3 | 2.83906 |
| 4 | 3.78541 |
| 5 | 4.73176 |
| 6 | 5.67812 |
| 7 | 6.62447 |
| 8 | 7.57082 |
| 9 | 8.51718 |
| 10 | 9.46353 |
| 15 | 14.1953 |
| 20 | 18.9271 |
| 25 | 23.6588 |
| 30 | 28.3906 |
| 40 | 37.8541 |
| 50 | 47.3176 |
| 75 | 70.9765 |
| 100 | 94.6353 |
| 200 | 189.271 |
| 250 | 236.588 |
| 500 | 473.176 |
| 1000 | 946.353 |

## API

- `GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=quart_us&to_unit=L` → unified JSON envelope with `result.values.result`, `formula`, `factor`, `sources`, `freshness`
- MCP: server `https://tttkmbb.com/mcp`, tool `convert_units` with `{"value":5,"from_unit":"quart_us","to_unit":"L"}`
- All volume units: https://tttkmbb.com/api/v1/units?quantity=volume · full converter: [Volume Converter](https://tttkmbb.com/conversion/volume.md)
- Authentication: none. Freshness: `static` (fixed conversion factors).

## FAQ

**How many liters are in one quart?**

1 qt = 0.946353 L. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures.

**What is the formula to convert US quarts to liters?**

Multiply the value in US quarts by 0.946352946: liters = US quarts × 0.946352946. For example, 5 qt = 4.73176 L.

**How do I convert liters back to US quarts?**

Multiply by the inverse factor 1.056688209 (US quarts = liters × 1.056688209), or use the liters-to-US quarts page.

## Related conversions

- [Liters to US quarts](https://tttkmbb.com/conversion/liters-to-quarts.md) (reverse)
- [Liters to US gallons](https://tttkmbb.com/conversion/liters-to-gallons.md)
- [US gallons to Liters](https://tttkmbb.com/conversion/gallons-to-liters.md)
- [Milliliters to US fluid ounces](https://tttkmbb.com/conversion/ml-to-fl-oz.md)
- [US fluid ounces to Milliliters](https://tttkmbb.com/conversion/fl-oz-to-ml.md)
- [Liters to Milliliters](https://tttkmbb.com/conversion/liters-to-ml.md)
- [Milliliters to Liters](https://tttkmbb.com/conversion/ml-to-liters.md)
- [US cups to Milliliters](https://tttkmbb.com/conversion/cups-to-ml.md)
- [Milliliters to US cups](https://tttkmbb.com/conversion/ml-to-cups.md)

## Data Sources

- NIST Special Publication 811 – Guide for the Use of the International System of Units (SI), Appendix B conversion factors — https://www.nist.gov/pml/special-publication-811 (standard, retrieved 2026-09-24)
- BIPM – The International System of Units (SI Brochure, 9th edition) — https://www.bipm.org/en/publications/si-brochure (standard, retrieved 2026-09-24)
- Wikipedia – Conversion of units — https://en.wikipedia.org/wiki/Conversion_of_units (reference, retrieved 2026-09-24)