How Much to Feed 100 g of Sourdough Starter

The numbers

Flour and water to add to 100 g of starter at each ratio
Ratio	Flour	Water	Jar total	Peak at 75 °F
1:1:1	100 g	100 g	300 g	3.5 to 5 hours
1:2:2	200 g	200 g	500 g	5.5 to 8 hours
1:3:3	300 g	300 g	700 g	6 to 10 hours
1:4:4	400 g	400 g	900 g	7 to 11 hours
1:5:5	500 g	500 g	1,100 g	8 to 12 hours
1:10:10	1,000 g	1,000 g	2,100 g	10 to 16 hours

Amounts use 100% hydration and white flour. Change hydration or the flour mix in the tool above.

When 100 g makes sense

A 100 g starter suits bakers who make several loaves or feed a big family. It also holds steady better than a very small starter, because one gram off on the scale matters less.

It uses a lot of flour at the larger ratios. If you only bake once a week, you may do better to keep 20 g in the jar and build up before the bake.

Use the discard

Most days you will discard part of the jar before you feed. Do not throw it out yet. Discard works in pancakes, crackers, flatbreads and waffles. Keep a covered container in the fridge and add to it each day.

If the jar holds more than 100 g, type its weight into Starter in my jar now. The calculator tells you how much to remove.

Check the jar size

At 1:5:5 the feeding reaches 1,100 g. That needs a jar of at least 2 liters, because the starter will double. At 1:2:2 the jar holds 500 g and a 1 liter jar is enough.

Quick answers

How much do I feed 100 g of starter?

At 1:1:1, add 100 g of flour and 100 g of water. At 1:5:5, add 500 g of each.

What jar do I need for 100 g of starter?

For 1:1:1 or 1:2:2 a 1 liter jar is enough. For 1:5:5 use a jar of 2 liters or more, because the starter doubles in size.

How much to feed 100 g of sourdough starter

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