How We Calculate Your Sourdough Price

The calculator computes your cost per loaf as (Ingredients + Starter Maintenance + Active Labor × Hourly Rate + Overhead) ÷ Yield, then shows your profit margin and effective hourly wage at any selling price you choose. This page explains the formula behind the Sourdough Pricing Calculator, the design decisions we made, and the reasoning behind them.

The Core Formula

The calculator uses a straightforward cost-plus model. For each loaf, the total cost is:

Cost Per Loaf = (Ingredient Cost + Starter Maintenance + Labor Cost + Overhead) ÷ Yield

Each component breaks down like this:

Ingredient Cost

For each ingredient in your recipe, the calculator computes:

Per-ingredient cost = (package price ÷ package size) × amount used

All amounts are stored internally in grams for consistency. If you enter a package size in ounces or pounds, it’s converted to grams before calculation. The total ingredient cost for the batch is the sum of all individual ingredient costs. For tracking how flour and wheat prices change over time, the USDA Economic Research Service wheat data is a reliable public source.

Starter Maintenance

Most sourdough calculators ignore starter maintenance entirely. We don’t.

If you maintain a sourdough starter, you feed it regularly with flour and water, typically 50-100g of each, daily or several times per week. That flour costs money whether you bake or not. The calculator lets you enter your daily feeding amount and flour cost, then amortizes it across your bakes per month:

Starter cost per bake = (daily feed amount × flour cost per gram × 30) ÷ bakes per month

For a baker who feeds 100g of flour daily at $0.22/100g and bakes 8 times per month, the starter maintenance cost per bake is about $0.83. Sounds small, right? Over a year that’s roughly $100 in flour that many bakers never account for.

Labor Cost

Labor is where our calculator differs most from simple ingredient calculators. We ask you to log each step of your baking process and mark whether it’s active (hands-on work) or passive (waiting time like bulk fermentation).

Why the distinction matters: Mixing dough for 10 minutes isn’t the same as waiting 4 hours for bulk fermentation. During active time, you can’t do anything else. During passive time, your kitchen is occupied but you’re free. Charging the same hourly rate for both would either undervalue active work or overvalue passive waiting.

The calculator computes labor cost using only your active hours:

Labor cost per batch = active hours × hourly rate

You set the hourly rate. We suggest $20-$35/hour for home bakers depending on your local cost of living and how you value your skill. This isn’t arbitrary. It’s roughly in line with Bureau of Labor Statistics occupational wage data for bakers and skilled trades like carpentry or plumbing, once you account for the years of practice sourdough baking requires.

Overhead

Overhead includes all costs that aren’t ingredients or labor:

• Energy: The cost of running your oven at 450-500°F for 45-60 minutes per bake session
• Packaging: Bags, labels, stickers, and twist ties (per loaf)
• Other: Market fees, delivery costs, equipment depreciation, or any other per-bake expense you want to include

You enter each overhead item directly. The calculator sums them and divides by yield to get overhead per loaf.

Yield and Per-Loaf Math

Once all batch-level costs are computed, the calculator divides by yield (number of loaves per batch) to get the cost per loaf:

Cost per loaf = (ingredients + starter + labor + overhead) ÷ loaves per batch

This is why batch size has such a dramatic effect on cost. Going from 2 loaves to 4 loaves per batch nearly halves the labor and overhead cost per loaf, while ingredient cost per loaf stays almost the same.

The Gut-Check: What Are You Really Paying Yourself?

After you set your selling price, the calculator shows you two critical numbers:

1. Profit margin: (selling price − cost per loaf) ÷ selling price. This tells you what percentage of each sale is actual profit.
2. Effective hourly wage: (total revenue − non-labor costs) ÷ active hours. This tells you what you’re actually paying yourself per hour of work.

The effective hourly wage is the most important number the calculator produces. If you set your selling price at $8 and the calculator shows you’re earning $4/hour, that’s a clear signal. Raise your price, increase your batch size, or find ways to reduce active labor time.

Sourdough Pricing Benchmarks

For reference, these are the ranges we commonly see from bakers using the calculator:

Why We Built This

Most sourdough “pricing calculators” online are just ingredient cost calculators. They add up flour and salt and tell you your loaf costs $2. That number is accurate for ingredients, but it’s wildly misleading for actual cost. It ignores labor, starter maintenance, and overhead, which together represent 75-85% of the real cost per loaf.

We built the Sourdough Pricing Calculator to give home bakers the full picture: every cost line, a realistic labor model, and the gut-check hourly wage that tells you whether your price makes sense. It runs entirely in your browser, requires no account, and your data never leaves your device.

Frequently Asked Questions

Why is labor the biggest cost in sourdough bread?

Because ingredients are cheap and your time isn’t. Labor typically accounts for 55-70% of the total cost of a sourdough loaf. Ingredients? Only $2-$3. But active labor time (mixing, stretch-and-folds, shaping, scoring, oven management, packaging) adds up to 60-90 minutes per batch. At a fair hourly rate of $15-$25/hour, that’s $5-$10 in labor cost per loaf, far more than the flour and salt combined.

Should I count passive time when pricing sourdough?

Not at your full hourly rate. Our calculator separates active time (hands-on work like mixing, shaping, scoring) from passive time (bulk fermentation, proofing). You shouldn’t charge the same rate for both since you can do other things during passive time. That said, passive time isn’t free either. It constrains your schedule and limits how many batches you can run. Some bakers count passive time at 10-25% of their active rate.

How does starter maintenance factor into sourdough cost?

Maintaining a sourdough starter costs $2-$15 per month in flour and water, depending on feeding frequency and flour type. The calculator amortizes this cost across the number of loaves you bake per month. If you bake 10 loaves/month and spend $8/month on starter feeds, that adds $0.80 per loaf. Bakers who feed daily with expensive flour see the highest per-loaf impact.