# Kilopascals to Millimeters of mercury (kPa to mmHg)

> Convert kilopascals to millimeters of mercury: 1 kPa = 7.50062 mmHg. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.

- Page id: `kpa-to-mmhg` · Quantity: Pressure (`pressure`, base unit Pa) · Tool: `convert_units`
- Canonical page: https://tttkmbb.com/conversion/kpa-to-mmhg · This document: https://tttkmbb.com/conversion/kpa-to-mmhg.md · JSON: https://tttkmbb.com/conversion/kpa-to-mmhg.json (add `?value=` for a result)

## Formula

- `1 kPa = 7.50062 mmHg`
- `millimeters of mercury = kilopascals × 7.500615758`
- Reverse: `kilopascals = millimeters of mercury × 0.1333223874`

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 kPa = 37.5031 mmHg
- 12.5 kPa = 93.7577 mmHg
- 100 kPa = 750.062 mmHg

## Conversion table

| Kilopascals (kPa) | Millimeters of mercury (mmHg) |
| --- | --- |
| 1 | 7.50062 |
| 2 | 15.0012 |
| 3 | 22.5018 |
| 4 | 30.0025 |
| 5 | 37.5031 |
| 6 | 45.0037 |
| 7 | 52.5043 |
| 8 | 60.0049 |
| 9 | 67.5055 |
| 10 | 75.0062 |
| 15 | 112.509 |
| 20 | 150.012 |
| 25 | 187.515 |
| 30 | 225.018 |
| 40 | 300.025 |
| 50 | 375.031 |
| 75 | 562.546 |
| 100 | 750.062 |
| 200 | 1500.12 |
| 250 | 1875.15 |
| 500 | 3750.31 |
| 1000 | 7500.62 |

## API

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

## FAQ

**How many millimeters of mercury are in one kilopascal?**

1 kPa = 7.50062 mmHg. 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 kilopascals to millimeters of mercury?**

Multiply the value in kilopascals by 7.500615758: millimeters of mercury = kilopascals × 7.500615758. For example, 5 kPa = 37.5031 mmHg.

**How do I convert millimeters of mercury back to kilopascals?**

Multiply by the inverse factor 0.1333223874 (kilopascals = millimeters of mercury × 0.1333223874), or use the millimeters of mercury-to-kilopascals page.

## Related conversions

- [Millimeters of mercury to kilopascals](https://tttkmbb.com/conversion/mmhg-to-kpa.md) (reverse)
- [Psi to Bar](https://tttkmbb.com/conversion/psi-to-bar.md)
- [Bar to Psi](https://tttkmbb.com/conversion/bar-to-psi.md)
- [Psi to Kilopascals](https://tttkmbb.com/conversion/psi-to-kpa.md)
- [Kilopascals to Psi](https://tttkmbb.com/conversion/kpa-to-psi.md)
- [Bar to Kilopascals](https://tttkmbb.com/conversion/bar-to-kpa.md)
- [Kilopascals to Bar](https://tttkmbb.com/conversion/kpa-to-bar.md)
- [Atmospheres to Pascals](https://tttkmbb.com/conversion/atm-to-pa.md)
- [Pascals to Atmospheres](https://tttkmbb.com/conversion/pa-to-atm.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)