# Tons of refrigeration to BTU per hour (TR to BTU/h)

> Convert tons of refrigeration to BTU per hour: 1 TR = 12000 BTU/h. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.

- Page id: `tons-of-refrigeration-to-btu-per-hour` · Quantity: Power (`power`, base unit W) · Tool: `convert_units`
- Canonical page: https://tttkmbb.com/conversion/tons-of-refrigeration-to-btu-per-hour · This document: https://tttkmbb.com/conversion/tons-of-refrigeration-to-btu-per-hour.md · JSON: https://tttkmbb.com/conversion/tons-of-refrigeration-to-btu-per-hour.json (add `?value=` for a result)

## Formula

- `1 TR = 12000 BTU/h`
- `BTU per hour = tons of refrigeration × 12000`
- Reverse: `tons of refrigeration = BTU per hour × 0.00008333333333`

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 TR = 60000 BTU/h
- 12.5 TR = 150000 BTU/h
- 100 TR = 1200000 BTU/h

## Conversion table

| Tons of refrigeration (TR) | BTU per hour (BTU/h) |
| --- | --- |
| 1 | 12000 |
| 2 | 24000 |
| 3 | 36000 |
| 4 | 48000 |
| 5 | 60000 |
| 6 | 72000 |
| 7 | 84000 |
| 8 | 96000 |
| 9 | 108000 |
| 10 | 120000 |
| 15 | 180000 |
| 20 | 240000 |
| 25 | 300000 |
| 30 | 360000 |
| 40 | 480000 |
| 50 | 600000 |
| 75 | 900000 |
| 100 | 1200000 |
| 200 | 2400000 |
| 250 | 3000000 |
| 500 | 6000000 |
| 1000 | 12000000 |

## API

- `GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=ton_refrigeration&to_unit=BTU%2Fh` → 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":"ton_refrigeration","to_unit":"BTU/h"}`
- All power units: https://tttkmbb.com/api/v1/units?quantity=power · full converter: [Power Converter](https://tttkmbb.com/conversion/power.md)
- Authentication: none. Freshness: `static` (fixed conversion factors).

## FAQ

**How many BTU per hour are in one ton of refrigeration?**

1 TR = 12000 BTU/h. 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 tons of refrigeration to BTU per hour?**

Multiply the value in tons of refrigeration by 12000: BTU per hour = tons of refrigeration × 12000. For example, 5 TR = 60000 BTU/h.

**How do I convert BTU per hour back to tons of refrigeration?**

Multiply by the inverse factor 0.00008333333333 (tons of refrigeration = BTU per hour × 0.00008333333333), or use the BTU per hour-to-tons of refrigeration page.

## Related conversions

- [BTU per hour to tons of refrigeration](https://tttkmbb.com/conversion/btu-per-hour-to-tons-of-refrigeration.md) (reverse)
- [Horsepower (mechanical) to Kilowatts](https://tttkmbb.com/conversion/hp-to-kw.md)
- [Kilowatts to Horsepower (mechanical)](https://tttkmbb.com/conversion/kw-to-hp.md)
- [Kilowatts to Watts](https://tttkmbb.com/conversion/kw-to-watts.md)
- [Watts to Kilowatts](https://tttkmbb.com/conversion/watts-to-kw.md)
- [BTU per hour to Watts](https://tttkmbb.com/conversion/btu-per-hour-to-watts.md)
- [Watts to BTU per hour](https://tttkmbb.com/conversion/watts-to-btu-per-hour.md)
- [Metric horsepower (PS) to Kilowatts](https://tttkmbb.com/conversion/ps-to-kw.md)
- [Kilowatts to Metric horsepower (PS)](https://tttkmbb.com/conversion/kw-to-ps.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)