# Therms to Kilowatt-hours (therm to kWh)

> Convert therms to kilowatt-hours: 1 therm = 29.3071 kWh. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.

- Page id: `therms-to-kwh` · Quantity: Energy (`energy`, base unit J) · Tool: `convert_units`
- Canonical page: https://tttkmbb.com/conversion/therms-to-kwh · This document: https://tttkmbb.com/conversion/therms-to-kwh.md · JSON: https://tttkmbb.com/conversion/therms-to-kwh.json (add `?value=` for a result)

## Formula

- `1 therm = 29.3071 kWh`
- `kilowatt-hours = therms × 29.30710702`
- Reverse: `therms = kilowatt-hours × 0.03412141633`

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 therm = 146.536 kWh
- 12.5 therm = 366.339 kWh
- 100 therm = 2930.71 kWh

## Conversion table

| Therms (therm) | Kilowatt-hours (kWh) |
| --- | --- |
| 1 | 29.3071 |
| 2 | 58.6142 |
| 3 | 87.9213 |
| 4 | 117.228 |
| 5 | 146.536 |
| 6 | 175.843 |
| 7 | 205.15 |
| 8 | 234.457 |
| 9 | 263.764 |
| 10 | 293.071 |
| 15 | 439.607 |
| 20 | 586.142 |
| 25 | 732.678 |
| 30 | 879.213 |
| 40 | 1172.28 |
| 50 | 1465.36 |
| 75 | 2198.03 |
| 100 | 2930.71 |
| 200 | 5861.42 |
| 250 | 7326.78 |
| 500 | 14653.6 |
| 1000 | 29307.1 |

## API

- `GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=therm&to_unit=kWh` → 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":"therm","to_unit":"kWh"}`
- All energy units: https://tttkmbb.com/api/v1/units?quantity=energy · full converter: [Energy Converter](https://tttkmbb.com/conversion/energy.md)
- Authentication: none. Freshness: `static` (fixed conversion factors).

## FAQ

**How many kilowatt-hours are in one therm?**

1 therm = 29.3071 kWh. 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 therms to kilowatt-hours?**

Multiply the value in therms by 29.30710702: kilowatt-hours = therms × 29.30710702. For example, 5 therm = 146.536 kWh.

**How do I convert kilowatt-hours back to therms?**

Multiply by the inverse factor 0.03412141633 (therms = kilowatt-hours × 0.03412141633), or use the kilowatt-hours-to-therms page.

## Related conversions

- [Kilowatt-hours to therms](https://tttkmbb.com/conversion/kwh-to-therms.md) (reverse)
- [Kilocalories (food calories) to Kilojoules](https://tttkmbb.com/conversion/kcal-to-kj.md)
- [Kilojoules to Kilocalories (food calories)](https://tttkmbb.com/conversion/kj-to-kcal.md)
- [Joules to Calories (small, thermochemical)](https://tttkmbb.com/conversion/joules-to-calories.md)
- [Calories (small, thermochemical) to Joules](https://tttkmbb.com/conversion/calories-to-joules.md)
- [Kilowatt-hours to Megajoules](https://tttkmbb.com/conversion/kwh-to-mj.md)
- [Megajoules to Kilowatt-hours](https://tttkmbb.com/conversion/mj-to-kwh.md)
- [Kilowatt-hours to BTU](https://tttkmbb.com/conversion/kwh-to-btu.md)
- [BTU to Kilowatt-hours](https://tttkmbb.com/conversion/btu-to-kwh.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)