# Liters to US quarts (L to qt)

> Convert liters to US quarts: 1 L = 1.05669 qt. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.

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

## Formula

- `1 L = 1.05669 qt`
- `US quarts = liters × 1.056688209`
- Reverse: `liters = US quarts × 0.946352946`

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 L = 5.28344 qt
- 12.5 L = 13.2086 qt
- 100 L = 105.669 qt

## Conversion table

| Liters (L) | US quarts (qt) |
| --- | --- |
| 1 | 1.05669 |
| 2 | 2.11338 |
| 3 | 3.17006 |
| 4 | 4.22675 |
| 5 | 5.28344 |
| 6 | 6.34013 |
| 7 | 7.39682 |
| 8 | 8.45351 |
| 9 | 9.51019 |
| 10 | 10.5669 |
| 15 | 15.8503 |
| 20 | 21.1338 |
| 25 | 26.4172 |
| 30 | 31.7006 |
| 40 | 42.2675 |
| 50 | 52.8344 |
| 75 | 79.2516 |
| 100 | 105.669 |
| 200 | 211.338 |
| 250 | 264.172 |
| 500 | 528.344 |
| 1000 | 1056.69 |

## API

- `GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=L&to_unit=quart_us` → 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":"L","to_unit":"quart_us"}`
- 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 US quarts are in one liter?**

1 L = 1.05669 qt. 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 liters to US quarts?**

Multiply the value in liters by 1.056688209: US quarts = liters × 1.056688209. For example, 5 L = 5.28344 qt.

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

Multiply by the inverse factor 0.946352946 (liters = US quarts × 0.946352946), or use the US quarts-to-liters page.

## Related conversions

- [US quarts to liters](https://tttkmbb.com/conversion/quarts-to-liters.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)