Sourdough Starter Feeding Calculator
Enter your target starter weight and feeding ratio to get exact flour and water amounts — or switch to timing mode to predict when a starter you've already fed will reach its peak.
Feeding ratio (starter:flour:water)
72°F
60°F90°F
Comfortable room temperature
Starter health
Reliable, rises and falls consistently
Feed at
Today 8:13 AM
Peak times are estimates based on temperature and ratio. Always observe your starter visually for the most accurate timing.
- Existing starter
- 15.0g
- Flour to add
- 75.0g
- Water to add
- 75.0g
- Total mix (w/ buffer)
- 165.0g
- Peak window
- Today 9:43 PM – Tomorrow 4:13 AM
- Use before
- Tomorrow 6:13 AM