What does a 1:1:1 feeding ratio mean?

A 1:1:1 ratio means you mix equal parts (by weight) of starter, flour, and water. For example, 50g starter, 50g flour, and 50g water.

How does hydration affect the feeding?

Hydration is the ratio of water to flour. A standard 100% hydration means equal parts water and flour by weight. Stiff starters might use 50-70% hydration (less water than flour).

Why do I need to calculate water temperature?

Starter activity is heavily influenced by temperature. Calculating the correct water temperature helps you reach an ideal starter dough temperature (often around 25°C or 77°F) to ensure predictable rising times.

User Guide: Sourdough Starter Feeding Calculator

1 Choose Your Calculation Mode

The calculator offers two ways to calculate your feeding amounts:

I have X starter: Use this when you know exactly how much leftover starter you want to feed. For example, if you have 50g of starter left in your jar, the tool will tell you how much flour and water to add to it.
I need Y total starter: Use this when your recipe calls for a specific amount of active starter (e.g., 200g for a bread recipe). The tool will calculate exactly how much seed starter, flour, and water you need to mix to get that exact final amount with zero waste.

2 Set Your Feeding Ratio

The feeding ratio is usually written as Starter : Flour : Water. In our calculator, you select the ratio of Starter to Flour (e.g., 1:2), and the water is calculated based on hydration.

Common Ratios:

1:1 (Maintenance): Good for daily feedings. It will peak in about 4-6 hours depending on temperature.
1:2 or 1:3 (Overnight): Gives the starter more food. Ideal for feeding before bed, allowing it to peak in 8-12 hours.
1:4 or 1:5 (Long Ferment): Good for skipping a day of feeding without refrigerating, or for very warm environments.

3 Adjust Hydration

Hydration determines the thickness of your starter.

100% Hydration (Default): The standard for most liquid starters. Equal parts flour and water by weight.
Lower Hydration (e.g., 60-80%): Creates a stiffer starter (like a stiff levain or lievito madre). Stiff starters often taste milder and peak more slowly.
Higher Hydration (e.g., 120%): Creates a very liquid starter, which ferments rapidly and produces more lactic acid.

4 Calculate Water Temperature (Optional)

Temperature control is the secret to consistent sourdough baking.

If you enter your room/flour temperature and your desired target starter temperature (typically 25°C or 77°F), the calculator will tell you exactly how warm your feeding water should be to hit that target.

Note: We use the standard baker's formula:
Water Temp = (Target Temp × 3) - (Room Temp × 2)
(Assuming flour temp equals room temp and friction factor is negligible for mixing starter).

Extended Technical Manual & Operational Guidelines for Sourdough Starter Feeding Calculator

The Sourdough Starter Feeding Calculator is designed to offer high-speed, secure, and reliable performance within our Developer & Software Engineering module. Built upon client-side JavaScript execution models, this utility eliminates external API dependencies and guarantees sub-millisecond calculation times without compromising data privacy.

Core Technical Features & Algorithmic Efficiency

Client-Side Privacy Sandbox: All user parameters, file contents, and numerical inputs are processed directly within local web browser memory space. No network payloads or private data streams are logged to third-party cloud servers.
Sub-Millisecond Calculation Engine: Engineered with optimized algorithms for instant parsing, value transformation, and formatted output generation as you interact with the controls.
Browser State Persistence: Automatically preserves your active configuration and recent input values using browser localStorage APIs for smooth workflow resumption across sessions.
Responsive & Accessible Design: Fully compliant with Web Content Accessibility Guidelines (WCAG 2.1 AA) and fluid mobile-first responsive breakpoints across desktop workstations, tablets, and smartphones.

Best Practices & Operational Recommendations

For optimal results with Sourdough Starter Feeding Calculator, ensure all input data adheres to standard formatting conventions. Use the built-in single-click clipboard action button to transfer computed results directly into your development IDEs, spreadsheets, or technical documentation. Explore our Detailed Step-by-Step Sourdough Starter Feeding Calculator User Guide for complete workflow examples and troubleshooting tips.