# Degrees Rankine to Degrees Fahrenheit (°R to °F)

> Convert degrees Rankine to degrees Fahrenheit with the formula °F = °R − 459.67. Conversion table and worked examples, with JSON API and MCP access.

- Page id: `rankine-to-fahrenheit` · Quantity: Temperature (`temperature`, base unit K) · Tool: `convert_units`
- Canonical page: https://tttkmbb.com/conversion/rankine-to-fahrenheit · This document: https://tttkmbb.com/conversion/rankine-to-fahrenheit.md · JSON: https://tttkmbb.com/conversion/rankine-to-fahrenheit.json (add `?value=` for a result)

## Formula

- `°F = °R − 459.67`
- `°F = °R − 459.67`
- Reverse: `°R = °F + 459.67`

Non-linear conversion: apply the formula directly; there is no single multiplication factor.

## Worked examples

- 300 °R = -159.67 °F
- 273.15 °R = -186.52 °F
- 0 °R = -459.67 °F

## Conversion table

| Degrees Rankine (°R) | Degrees Fahrenheit (°F) |
| --- | --- |
| 0 | -459.67 |
| 50 | -409.67 |
| 100 | -359.67 |
| 150 | -309.67 |
| 200 | -259.67 |
| 250 | -209.67 |
| 273.15 | -186.52 |
| 293.15 | -166.52 |
| 300 | -159.67 |
| 310 | -149.67 |
| 350 | -109.67 |
| 373.15 | -86.52 |
| 400 | -59.67 |
| 500 | 40.33 |
| 600 | 140.33 |
| 800 | 340.33 |
| 1000 | 540.33 |
| 1500 | 1040.33 |
| 2000 | 1540.33 |
| 5000 | 4540.33 |

## API

- `GET https://tttkmbb.com/api/v1/convert?value=300&from_unit=R&to_unit=F` → unified JSON envelope with `result.values.result`, `formula`, `factor`, `sources`, `freshness`
- MCP: server `https://tttkmbb.com/mcp`, tool `convert_units` with `{"value":300,"from_unit":"R","to_unit":"F"}`
- All temperature units: https://tttkmbb.com/api/v1/units?quantity=temperature · full converter: [Temperature Converter](https://tttkmbb.com/conversion/temperature.md)
- Authentication: none. Freshness: `static` (fixed conversion factors).

## FAQ

**What is the formula to convert degrees Rankine to degrees Fahrenheit?**

°F = °R − 459.67. For example, 300 °R = -159.67 °F.

**How do I convert degrees Fahrenheit back to degrees Rankine?**

°R = °F + 459.67; the degrees Fahrenheit-to-degrees Rankine page applies it directly.

**Why is there no single multiplication factor?**

Temperature scales have different zero points, so the conversion is an affine formula (scale and offset), not a plain multiplication.

## Related conversions

- [Degrees Fahrenheit to degrees Rankine](https://tttkmbb.com/conversion/fahrenheit-to-rankine.md) (reverse)
- [Degrees Celsius to Degrees Fahrenheit](https://tttkmbb.com/conversion/celsius-to-fahrenheit.md)
- [Degrees Fahrenheit to Degrees Celsius](https://tttkmbb.com/conversion/fahrenheit-to-celsius.md)
- [Degrees Celsius to Kelvin](https://tttkmbb.com/conversion/celsius-to-kelvin.md)
- [Kelvin to Degrees Celsius](https://tttkmbb.com/conversion/kelvin-to-celsius.md)
- [Degrees Fahrenheit to Kelvin](https://tttkmbb.com/conversion/fahrenheit-to-kelvin.md)
- [Kelvin to Degrees Fahrenheit](https://tttkmbb.com/conversion/kelvin-to-fahrenheit.md)
- [Kelvin to Degrees Rankine](https://tttkmbb.com/conversion/kelvin-to-rankine.md)
- [Degrees Rankine to Kelvin](https://tttkmbb.com/conversion/rankine-to-kelvin.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)