Sourdough Starter Metric and US Equivalents - Zero-Waste Chef (2024)

Every once in a while, I’ll look at the list of search terms that brings people to my blog. As you can see from some of the search terms above, lots of people look for sourdough starter equivalents.

Most of the sourdough bread recipes I’ve seen (and have written) call for starter weighed in grams. If you don’t have a scale, you’ll want those measurements in volume. But I’ve included conversions going in the other direction as well, from US cups to grams. Sometimes you’ll use a recipe that lists an ingredient in cups but you’d rather use your scale—especially if you live outside the US.

Sourdough Starter Metric and US Equivalents - Zero-Waste Chef (2)

I worked out these conversions using my 100 percent hydration sourdough starter, which contains equal parts flour and water by weight. When I feed my sourdough starter (which I generally keep small), I’ll add 40 grams of flour and 40 grams of water to a spoonful of starter from the previous batch.

Metric to US

MetricUS
25 grams sourdough starter1 tablespoon + 1 generous teaspoon
50 grams sourdough starter3 tablespoons
100 grams sourdough starter1/3 cup + 1/2 tablespoon
150 grams sourdough starter1/2 cup + 1 tablespoon
320 grams sourdough starter1 cup + 2 1/2 tablespoons

US to Metric

MetricUS
1 tablespoon sourdough starter17 grams
2 tablespoons sourdough starter34 grams
1/4 cup sourdough starter69 grams
1/3 cup sourdough starter92 grams
1/2 cup sourdough starter138 grams
2/3 cup sourdough starter184 grams
1 cup sourdough starter276 grams

Go here for a post that converts the sourdough bread ingredients to US cups.

Sourdough Starter Metric and US Equivalents - Zero-Waste Chef (3)

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Sourdough Starter Metric and US Equivalents - Zero-Waste Chef (2024)

FAQs

Sourdough Starter Metric and US Equivalents - Zero-Waste Chef? ›

My spontaneous answer is that it doesn't really matter! As long as you keep your culture happy, feeding it regularly, every 1 or max. 2 weeks (if stored in the fridge), the exact amounts of sourdough, fresh flour, and water that you're going to use don't play a significant role.

Do you need exact measurements for sourdough starter? ›

My spontaneous answer is that it doesn't really matter! As long as you keep your culture happy, feeding it regularly, every 1 or max. 2 weeks (if stored in the fridge), the exact amounts of sourdough, fresh flour, and water that you're going to use don't play a significant role.

How many grams is 1 cup sourdough discard? ›

Hate discarding so much starter? See "tips," below. Remove however much starter you need for your recipe — typically no more than 227 grams, about 1 cup.

How many cups is 50 grams of starter? ›

Because my kitchen is cold for much of the year, I like using 100 g (1/2 cup) of starter as opposed to 50 g (1/4 cup).

How much is 30 grams of sourdough starter? ›

Dry-sourdough starter ingredients: 1 tablespoon (30 grams) starter, 1/3 cup water (I do 50 grams), 2/3 cup flour (I do 100 grams). A small piece of sourdough starter always carries on. Add in the water to the sourdough starter piece. Add in the flour to the sourdough starter + water.

What is the best ratio for sourdough starter? ›

The most common feeding ratio is 1:1:1 (sourdough starter: flour: water). This is also known as a 100% hydration starter. For example, let's say you have 40 g of sourdough starter in a jar. To feed it, you'll add 40 g of flour + 40 g of water.

How do I know if my sourdough starter is strong enough? ›

Typical signs your starter is ripe and ready to be used:
  1. Some rise.
  2. Bubbles on top and at the sides.
  3. A sour aroma.
  4. Loosening in consistency.
May 16, 2024

Why discard half of sourdough starter? ›

If you don't get rid of the excess, eventually you'll have more starter than your feedings can sustain. After a few days, your daily 1/4 cup flour and water won't be enough to sustain your entire jar of starter, and your starter will be slow and sluggish, not much better than discard itself.

How do you calculate sourdough starter? ›

Baker's Percentage of Sourdough Starter
  1. Fermented Flour to Total Flour: = (400/2)/(800+200) = 200 / 1,000 = 20%
  2. Fermented Flour to Non-Fermented Flour = (400/2)/800 = 200 / 800 = 25%
  3. Total Starter to Total Flour = 400 / (800+200) = 400 / 1,000 = 40%
  4. Total Starter to Non-fermented Flour = 400 / 800 = 50%
May 4, 2023

What is the best flour for sourdough starter? ›

The best flour blend for creating a new sourdough starter is 50% whole-meal flour (whole wheat or whole rye) and 50% bread flour or all-purpose flour. I recommend a 50/50 mix of whole wheat flour and bread flour. Why do you need to use these two types of flour?

What is 1 cup of sourdough starter? ›

To make 1 cup (227g) sourdough starter to use in a recipe, aim for at least 247g (we'll round it up to 250g) in order to have 20g left over to feed and maintain.

What is 100g of sourdough starter? ›

Metric to US
MetricUS
50 grams sourdough starter3 tablespoons
100 grams sourdough starter1/3 cup + 1/2 tablespoon
150 grams sourdough starter1/2 cup + 1 tablespoon
320 grams sourdough starter1 cup + 2 1/2 tablespoons
1 more row
Aug 5, 2020

How many cups is 60g starter? ›

To create the starter:
  1. 60 g (1/2 cup) whole wheat flour.
  2. 60 g (1/4 cup) water.
Mar 21, 2019

How to measure out sourdough starter? ›

Starter is difficult to measure by volume

Because starter volume can vary wildly, depending on how thick it is and whether or not it's fully stirred down before measuring. Weight will always be the most accurate way to measure starter — plus it saves cleaning a measuring cup!

Why use a stiff sourdough starter? ›

A stiff starter is a little more forgiving when it comes to refreshment (feeding) due to the delayed “falling” (when compared to a liquid starter which falls when food is exhausted) of the dome on top when rising.

Does sourdough have to be exact? ›

Although it is possible to bake familiar recipes based on look and feel, precision is essential when it comes to baking sourdough bread, The intended ratio of a recipe and its ingredients is a science that requires precise measurement and practice. If you resort to guesswork then you can quickly come unstuck.

Does the size of the jar matter for sourdough starter? ›

Once a starter is active, it will at least double in height. Thus, you need to use a jar that is at least twice the size of your starter. If you're maintaining a small sourdough starter, then a pint-sized jar will work. A quart-sized jar is good for larger starters.

Does the amount of sourdough starter matter? ›

The more starter you use, the faster your dough will ferment - resulting in a less sour loaf. Of course the amount of starter is actually a ratio in relation to the flour - so 50g of starter to 500g of flour will ferment at a much slower rate than 200g of starter to 500g of flour.

Do you need a kitchen scale for sourdough starter? ›

Skip the scale and just make a fantastic sourdough bread!

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