# Kilograms to US short tons (kg to short ton)

> Convert kilograms to US short tons: 1 kg = 0.00110231 short ton. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.

- Page id: `kg-to-tons` · Quantity: Mass (`mass`, base unit kg) · Tool: `convert_units`
- Canonical page: https://tttkmbb.com/conversion/kg-to-tons · This document: https://tttkmbb.com/conversion/kg-to-tons.md · JSON: https://tttkmbb.com/conversion/kg-to-tons.json (add `?value=` for a result)

## Formula

- `1 kg = 0.00110231 short ton`
- `US short tons = kilograms × 0.001102311311`
- Reverse: `kilograms = US short tons × 907.18474`

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 kg = 0.00551156 short ton
- 12.5 kg = 0.0137789 short ton
- 100 kg = 0.110231 short ton

## Conversion table

| Kilograms (kg) | US short tons (short ton) |
| --- | --- |
| 1 | 0.00110231 |
| 2 | 0.00220462 |
| 3 | 0.00330693 |
| 4 | 0.00440925 |
| 5 | 0.00551156 |
| 6 | 0.00661387 |
| 7 | 0.00771618 |
| 8 | 0.00881849 |
| 9 | 0.0099208 |
| 10 | 0.0110231 |
| 15 | 0.0165347 |
| 20 | 0.0220462 |
| 25 | 0.0275578 |
| 30 | 0.0330693 |
| 40 | 0.0440925 |
| 50 | 0.0551156 |
| 75 | 0.0826733 |
| 100 | 0.110231 |
| 200 | 0.220462 |
| 250 | 0.275578 |
| 500 | 0.551156 |
| 1000 | 1.10231 |

## API

- `GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=kg&to_unit=ton_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":"kg","to_unit":"ton_us"}`
- All mass units: https://tttkmbb.com/api/v1/units?quantity=mass · full converter: [Mass / Weight Converter](https://tttkmbb.com/conversion/mass.md)
- Authentication: none. Freshness: `static` (fixed conversion factors).

## FAQ

**How many US short tons are in one kilogram?**

1 kg = 0.00110231 short ton. 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 kilograms to US short tons?**

Multiply the value in kilograms by 0.001102311311: US short tons = kilograms × 0.001102311311. For example, 5 kg = 0.00551156 short ton.

**How do I convert US short tons back to kilograms?**

Multiply by the inverse factor 907.18474 (kilograms = US short tons × 907.18474), or use the US short tons-to-kilograms page.

## Related conversions

- [US short tons to kilograms](https://tttkmbb.com/conversion/tons-to-kg.md) (reverse)
- [Kilograms to Pounds](https://tttkmbb.com/conversion/kg-to-lbs.md)
- [Pounds to Kilograms](https://tttkmbb.com/conversion/lbs-to-kg.md)
- [Grams to Ounces](https://tttkmbb.com/conversion/grams-to-oz.md)
- [Ounces to Grams](https://tttkmbb.com/conversion/oz-to-grams.md)
- [Kilograms to Stone](https://tttkmbb.com/conversion/kg-to-stone.md)
- [Stone to Kilograms](https://tttkmbb.com/conversion/stone-to-kg.md)
- [Pounds to Ounces](https://tttkmbb.com/conversion/lbs-to-oz.md)
- [Ounces to Pounds](https://tttkmbb.com/conversion/oz-to-lbs.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)