Millimeter of water to Hectopascal Converter (and vice versa)
Created by: tinycalcs.com/en
Number of supported units: 2
Last update: 2026
This converter allows you to convert millimeters of water [mmH₂O, mmWS] to hectopascals [hPa] or hectopascals [hPa] to millimeters of water [mmH₂O, mmWS]. Calculations are performed in both directions. The calculation result and the entered value are displayed with up to 20 decimal places for maximum accuracy.
Convert millimeters of water to hectopascals
There are two simple ways to convert millimeters of water [mmH₂O, mmWS] to hectopascals [hPa]. In the first calculation method, the value in millimeters of water [mmH₂O, mmWS] is divided by the rounded conversion factor of 10.1972. The second method multiplies the value in millimeters of water [mmH₂O, mmWS] by the rounded conversion factor of 0.0981.
- Hectopascals [hPa] ≈ millimeters of water [mmH₂O, mmWS] ÷ 10.1972
- Hectopascals [hPa] ≈ millimeters of water [mmH₂O, mmWS] * 0.0981
However, rounded conversion values are only suitable for rough conversions, as rounding errors can occur in the calculation result. The most accurate conversion of millimeters of water [mmH₂O, mmWS] to hectopascals [hPa] can be achieved using the following calculation method.
- Hectopascals [hPa] = millimeters of water [mmH₂O, mmWS] * 980.665 ÷ 104
Convert hectopascals to millimeters of water
Converting hectopascals [hPa] to millimeters of water [mmH₂O, mmWS] is easy and can be done in two ways. The first method involves multiplication, in which the value in hectopascals [hPa] is multiplied by the rounded conversion factor of 10.1972. The second variant is a division. Here, the value in hectopascals [hPa] is divided by the rounded conversion factor of 0.0981.
- Millimeters of water [mmH₂O, mmWS] ≈ hectopascals [hPa] * 10.1972
- Millimeters of water [mmH₂O, mmWS] ≈ hectopascals [hPa] ÷ 0.0981
However, rounded conversion values do not allow for exact calculations because rounding errors can occur in the calculation result. The most accurate conversion of hectopascals [hPa] to millimeters of water [mmH₂O, mmWS] can be achieved using the following calculation method.
- Millimeters of water [mmH₂O, mmWS] = hectopascals [hPa] ÷ 980.665 * 104
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Millimeters of water
Inches of mercury
Millimeters of water
Inches of water
Millimeters of water
Kilobar
Millimeters of water
Kilograms per square centimeter
Millimeters of water
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