Hectopascals to Millimetres of mercury
Type a value in Hectopascals and get the result in Millimetres of mercury, calculated exactly.
1 Hectopascals ≈ 0.7500615758 Millimetres of mercury
Precision
Conventional factorRounded for display to about 10 significant digits.
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Formula
mmHg = hPa ÷ 1.33322387415
To convert Hectopascals to Millimetres of mercury, divide the value by 1.33322387415.
Worked examples
- 1 hPa ÷ 1.33322387415 ≈ 0.7500615758 mmHg
- 100 hPa ÷ 1.33322387415 ≈ 75.00615758 mmHg
- 50 hPa ÷ 1.33322387415 ≈ 37.50307879 mmHg
This factor rests on a conventional or rounded value.
Conversion table
| Hectopascals (hPa) | Millimetres of mercury (mmHg) |
|---|---|
| 1 | ≈ 0.7500616 |
| 2 | ≈ 1.500123 |
| 3 | ≈ 2.250185 |
| 4 | ≈ 3.000246 |
| 5 | ≈ 3.750308 |
| 6 | ≈ 4.500369 |
| 7 | ≈ 5.250431 |
| 8 | ≈ 6.000493 |
| 9 | ≈ 6.750554 |
| 10 | ≈ 7.500616 |
| 15 | ≈ 11.25092 |
| 20 | ≈ 15.00123 |
| 25 | ≈ 18.75154 |
| 30 | ≈ 22.50185 |
| 40 | ≈ 30.00246 |
| 50 | ≈ 37.50308 |
| 60 | ≈ 45.00369 |
| 70 | ≈ 52.50431 |
| 75 | ≈ 56.25462 |
| 80 | ≈ 60.00493 |
| 90 | ≈ 67.50554 |
| 100 | ≈ 75.00616 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: Millimetres of mercury to Hectopascals
| Millimetres of mercury (mmHg) | Hectopascals (hPa) |
|---|---|
| 1 | 1.33322387415 |
| 2 | 2.6664477483 |
| 3 | 3.99967162245 |
| 4 | 5.3328954966 |
| 5 | 6.66611937075 |
| 6 | 7.9993432449 |
| 7 | 9.33256711905 |
| 8 | 10.6657909932 |
| 9 | 11.99901486735 |
| 10 | 13.3322387415 |
| 15 | 19.99835811225 |
| 20 | 26.664477483 |
| 25 | 33.33059685375 |
| 30 | 39.9967162245 |
| 40 | 53.328954966 |
| 50 | 66.6611937075 |
| 60 | 79.993432449 |
| 70 | 93.3256711905 |
| 75 | 99.99179056125 |
| 80 | 106.657909932 |
| 90 | 119.9901486735 |
| 100 | 133.322387415 |
Unit definitions
- Hectopascals hPa
- Exactly 100 pascals, equal to one millibar; used in weather reports.
- Millimetres of mercury mmHg
- The conventional value of 133.322387415 pascals, used for blood pressure.
Questions people ask
Hectopascals to Millimetres of mercury: what is the conversion factor?
One hPa is ≈ 0.7500615758 mmHg.
How do I convert Hectopascals to Millimetres of mercury?
Use the formula above. For example, 100 hPa = ≈ 75.00615758 mmHg.
Is the conversion exact?
Very nearly. One of the units is based on a conventional or rounded value, so treat the result as a close approximation.
Factors checked 19 October 2026.