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Open toolHydration Calculator
Find total dough hydration including starter and additional water needed for a supplied target. Provide Added flour mass (g), Added water mass (g), Starter mass (g) to compute results directly in your browser. Starter hydration=water/flour*100. Starter contains only flour and water in this model; other ingredient water excluded. If target is below current hydration, extra water is zero and reformulation is required. No dough-handling or fermentation prediction. Inputs and results use floating-point numbers; output shows up to 12 significant digits. Rounding can occur.
Free to useNo sign-upRuns in your browser
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Enter the inputs, then select Calculate.
Your result
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Result will appear here
How the Hydration Calculator Works & Core Formula
The Hydration Calculator evaluates Added flour mass (g), Added water mass (g), Starter mass (g) in client-side JavaScript using the deterministic rule below and updates the output panel immediately without uploading data to a server.
Find total dough hydration including starter and additional water needed for a supplied target.
Starter hydration=water/flour*100. Starter contains only flour and water in this model; other ingredient water excluded. If target is below current hydration, extra water is zero and reformulation is required. No dough-handling or fermentation prediction. Inputs and results use floating-point numbers; output shows up to 12 significant digits. Rounding can occur.
Hydration Calculator Quick Reference & Input Guide
Review the input parameters, allowed value ranges, and worked reference cases for the Hydration Calculator below before running your calculation.
| Parameter / Scenario | Default / Sample Value | Rule or Allowed Range | Output / Usage Note |
|---|---|---|---|
| Input: Added flour mass (g) | 500 | Range: 1e-09 to 1000000000.0 | Required workspace parameter |
| Input: Added water mass (g) | 300 | Range: 0 to 1000000000.0 | Required workspace parameter |
| Input: Starter mass (g) | 100 | Range: 0 to 1000000000.0 | Required workspace parameter |
| Input: Starter hydration (%) | 100 | Range: 0 to 1000 | Required workspace parameter |
| Worked Case 1: Baseline run (Added flour mass (g) = 500) | Preloaded / test values | Find total dough hydration including starter and additional water needed for a supplied target | Added flour mass (g) = 500; Added water mass (g) = 300; Starter mass (g) = 100; Starter hydration (%) = 100; Target dough hydration (%) = 70. The displayed output is Total flour: 550 g Total water: 350 g Hydration: 63.6363636364% Additional water: 35 g Target status: Add water to reach target. |
| Worked Case 2: Comparison scenario (hydration calculator bread) | Preloaded / test values | Find total dough hydration including starter and additional water needed for a supplied target | Added flour mass (g) = 400; Added water mass (g) = 250; Starter mass (g) = 200; Starter hydration (%) = 100; Target dough hydration (%) = 60. The displayed output is Total flour: 500 g Total water: 350 g Hydration: 70% Additional water: 0 g Target status: Target below current; reformulate. |
Step-by-Step Guide to Using the Hydration Calculator
Follow these three steps to configure Added flour mass (g), Added water mass (g), Starter mass (g), verify unit and boundary rules, and export your Hydration Calculator output.
Input and settings
Complete the other inputs
Set added water mass (g), starter mass (g), starter hydration (%), target dough hydration (%). Supply added flour, water and starter, including the starter hydration percentage.
Tool result
Calculate and read the output
Select Calculate to see the total dough hydration and extra water needed for the target. Copy result copies this text; Download saves it as a TXT file.
Review the details
Practical Worked Examples for Hydration Calculator
These concrete scenarios illustrate how the Hydration Calculator processes baseline inputs, comparison checks, and boundary constraints.
Baseline run (Added flour mass (g) = 500)
Added flour mass (g) = 500; Added water mass (g) = 300; Starter mass (g) = 100; Starter hydration (%) = 100; Target dough hydration (%) = 70. The displayed output is Total flour: 550 g Total water: 350 g Hydration: 63.6363636364% Additional water: 35 g Target status: Add water to reach target.
Comparison scenario (hydration calculator bread)
Added flour mass (g) = 400; Added water mass (g) = 250; Starter mass (g) = 200; Starter hydration (%) = 100; Target dough hydration (%) = 60. The displayed output is Total flour: 500 g Total water: 350 g Hydration: 70% Additional water: 0 g Target status: Target below current; reformulate.
Boundary & unit check (Hydration Calculator)
When solving for 'hydration calculator', verify that Added flour mass (g), Added water mass (g), Starter mass (g) use consistent units and stay within the documented scope: Starter hydration=water/flour*100. Starter contains only flour and water in this model; other ingredient water excluded. If target is below current hydration, extra water is zero and reformulation is required. No dough-handling or fermentation prediction. Inputs and results use floating-point numbers; output shows up to 12 significant digits. Rounding can occur.
How to Read and Verify the Hydration Calculator Output
The output panel reports the exact result derived from Added flour mass (g), Added water mass (g), Starter mass (g) alongside any unit or formatting notes.
The result is the total dough hydration and extra water needed for the target. Account for starter flour and water when reviewing a dough's hydration.
The starter contains only flour and water in this model; a lower target requires reformulation rather than adding negative water.
Numerical output shows up to 12 significant digits. Floating-point arithmetic and display rounding can affect the last digits.
- Example input
- Added flour mass (g) = 500; Added water mass (g) = 300; Starter mass (g) = 100; Starter hydration (%) = 100; Target dough hydration (%) = 70
- Example output
- Total flour: 550 g Total water: 350 g Hydration: 63.6363636364% Additional water: 35 g Target status: Add water to reach target
Scope Limits, Accuracy Assumptions & Related Everyday Math Tools
Review these boundary constraints and validation rules before relying on the Hydration Calculator output.
Operational scope: Starter hydration=water/flour*100. Starter contains only flour and water in this model; other ingredient water excluded. If target is below current hydration, extra water is zero and reformulation is required. No dough-handling or fermentation prediction. Inputs and results use floating-point numbers; output shows up to 12 significant digits. Rounding can occur. Inputs that violate minimum/maximum bounds or required format rules are rejected with a clear diagnostic prompt.
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Open toolFrequently Asked Questions About Hydration Calculator
Answers about using Hydration Calculator and understanding its results.
What formula or rule does the Hydration Calculator use?
The Hydration Calculator applies the rule: Find total dough hydration including starter and additional water needed for a supplied target. Enter Added flour mass (g), Added water mass (g), Starter mass (g) into the workspace and the tool computes the exact output in your browser.
What input parameters and units are required for Hydration Calculator?
Yes. Provide Added flour mass (g), Added water mass (g), Starter mass (g) using the documented units and format shown in the quick reference table above. Preloaded default values let you test the workflow immediately.
What are the accuracy limits and boundary assumptions for Hydration Calculator?
Starter hydration=water/flour*100. Starter contains only flour and water in this model; other ingredient water excluded. If target is below current hydration, extra water is zero and reformulation is required. No dough-handling or fermentation prediction. Inputs and results use floating-point numbers; output shows up to 12 significant digits. Rounding can occur. Confirm that your inputs fall within the allowed ranges before exporting the result.
Is the Hydration Calculator free and does it keep my inputs private?
Yes. All calculations for the Hydration Calculator execute 100% locally in your browser's JavaScript runtime. No inputs or results are uploaded to any external server.
Get the total dough hydration and extra water needed for the target
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