Water Density Calculator
Use the Water Density Calculator for a transparent, instant calculation with validated inputs and cited sources. For a query such as “density of water”, enter the matching values and units below and review the stated assumptions.
How to use this calculator
Enter the requested values and units.
Review the assumptions and any warnings shown with the result.
Use the result together with the cited source and your real-world requirements.
Formula
Estimate freshwater density near 1 atmosphere from the entered 0–100°C temperature with the cited temperature-density polynomial.
Worked example
Worked example: Inputs: Water temperature: 20 °C. Outputs: Freshwater density at about 1 atm: 998.233636 kg/m³.
Assumptions and limits
- The result depends on the values, units, and assumptions entered. It does not infer missing context.
Sources
- National Institute of Standards and Technology: NIST Reference Fluid Thermodynamic and Transport Properties Database (REFPROP)Reference material reviewed for the stated method, units, or domain. Confirm that its scope matches your use case. Reviewed 2026-08-14.
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Frequently asked questions
How does the Water Density Calculator work?
Estimate freshwater density near 1 atmosphere from the entered 0–100°C temperature with the cited temperature-density polynomial.
What should I enter?
Water temperature
What should I verify?
Review the assumptions and any warnings shown with the result. The result depends on the values, units, and assumptions entered. It does not infer missing context.
Last updated 2026-08-14 · science-water-density-v1 · opportunity-content-2026-08-14 · Trusty Calculator Editorial Team