Pound per square foot to Millimeter of water Converter (and vice versa)

Created by: tinycalcs.com/en
Number of supported units: 2
Last update: 2026

This converter allows you to convert pounds per square foot [lb/ft², psf] to millimeters of water [mmH₂O, mmWS] or millimeters of water [mmH₂O, mmWS] to pounds per square foot [lb/ft², psf]. Calculations are performed in both directions. The calculation result and the entered value are displayed with up to 20 decimal places for maximum accuracy.

1 pound per square foot [lb/ft², psf] ≈ 4.8824 millimeters of water [mmH₂O, mmWS]1 millimeter of water [mmH₂O, mmWS] ≈ 0.2048 pounds per square foot [lb/ft², psf]

Convert pounds per square foot to millimeters of water

There are two simple ways to convert pounds per square foot [lb/ft², psf] to millimeters of water [mmH₂O, mmWS]. In the first calculation method, the value in pounds per square foot [lb/ft², psf] is divided by the rounded conversion factor of 0.2048. The second method multiplies the value in pounds per square foot [lb/ft², psf] by the rounded conversion factor of 4.8824.

  • Millimeters of water [mmH₂O, mmWS] ≈ pounds per square foot [lb/ft², psf] ÷ 0.2048
  • Millimeters of water [mmH₂O, mmWS] ≈ pounds per square foot [lb/ft², psf] * 4.8824

However, rounded conversion values are only suitable for rough conversions, as rounding errors can occur in the calculation result. The most accurate conversion of pounds per square foot [lb/ft², psf] to millimeters of water [mmH₂O, mmWS] can be achieved using the following calculation method.

  • Millimeters of water [mmH₂O, mmWS] = pounds per square foot [lb/ft², psf] * 453.59237 ÷ 92.90304

Convert millimeters of water to pounds per square foot

Converting millimeters of water [mmH₂O, mmWS] to pounds per square foot [lb/ft², psf] is easy and can be done in two ways. The first method involves multiplication, in which the value in millimeters of water [mmH₂O, mmWS] is multiplied by the rounded conversion factor of 0.2048. The second variant is a division. Here, the value in millimeters of water [mmH₂O, mmWS] is divided by the rounded conversion factor of 4.8824.

  • Pounds per square foot [lb/ft², psf] ≈ millimeters of water [mmH₂O, mmWS] * 0.2048
  • Pounds per square foot [lb/ft², psf] ≈ millimeters of water [mmH₂O, mmWS] ÷ 4.8824

However, rounded conversion values do not allow for exact calculations because rounding errors can occur in the calculation result. The most accurate conversion of millimeters of water [mmH₂O, mmWS] to pounds per square foot [lb/ft², psf] can be achieved using the following calculation method.

  • Pounds per square foot [lb/ft², psf] = millimeters of water [mmH₂O, mmWS] ÷ 453.59237 * 92.90304

Converter

Decimal places

How it's calculated

Factor: 
≈ 4.882
Millimeters of water = Pounds per square foot * 453.59237 ÷ 92.90304
Pounds per square foot = Millimeters of water ÷ 453.59237 * 92.90304

To all available units

Pounds per square foot

Millipascals

Pounds per square foot

Newtons per square millimeter

Pounds per square foot

Pascals

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Pounds per square inch

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Psi

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