Bone Broth Cost Per Batch Calculator

Homemade bone broth looks like free food — you're using bones that would otherwise go in the trash. But once you add the electricity for a 24-hour simmer, the vinegar, aromatics, and glass jars, the real cost per quart is higher than most people expect. Plug in your actual numbers to see exactly what each batch costs and how it compares to store-bought.

$
$
hrs
W
$
$
qts
$

What This Calculator Measures — and Why the Numbers Surprise People

Most bone broth guides say the ingredient cost is close to zero because you use carcasses and scraps you saved in the freezer. That part is true, but it ignores electricity. A 24-hour stovetop simmer on a medium-low burner consumes roughly 2 to 3 kWh. A slow cooker running 24 hours uses about 1.4 kWh. At the US average of 16 cents per kWh, you're looking at 22 to 48 cents in electricity per batch — not huge, but it's real money that store-bought comparisons always miss. Add glass jars, apple cider vinegar, onion, garlic, and peppercorns, and a "free" batch actually costs $2 to $5 before you account for bones you purchased.

The Core Formula

Cost Per Quart = (Bone Cost + Aromatics + Electricity + Jar Cost) ÷ Quarts Yielded

Electricity = (Appliance Watts ÷ 1000) × Simmer Hours × Electric Rate. For a slow cooker at 200W running 20 hours at $0.16/kWh, that's 0.2 kWh × 20 × $0.16 = $0.64. For a stovetop burner at 1,200W, the same duration costs $3.84 — six times more. The appliance choice is the single biggest lever in this calculation once bones are free.

Typical Input Values to Use

  • Bone cost: $0 (saved freezer scraps) to $6 (retail beef soup bones). Chicken carcasses from a rotisserie bird run about $1-$2 each; 2-3 per batch is typical.
  • Aromatics and vinegar: $0.75 to $1.50 per batch. Onion, celery, carrot, a few peppercorns, a tablespoon of apple cider vinegar. The vinegar helps extract minerals and costs roughly 10 cents per batch.
  • Simmer time: Chicken broth 12-18 hours, beef/pork broth 18-36 hours. Pressure cooker cuts this to 3-4 hours with similar collagen extraction.
  • Appliance wattage: Slow cooker 150-250W, electric pressure cooker (Instant Pot) 700-1,000W but runs far fewer hours, stovetop burner 750-3,000W depending on setting.
  • Yield: A 6-quart slow cooker typically yields 3-5 quarts after reduction and straining. A 3-gallon stockpot yields 6-10 quarts.
  • Store-bought price: USDA organic bone broth runs $5-$9 per quart (Kettle & Fire, Bare Bones). Grocery store store-brand runs $2.50-$4.50. Compare apples to apples.

Common Mistakes That Skew the Numbers

  • Forgetting stovetop wattage: A stovetop burner at medium-low runs roughly 750-1,000W — four to five times a slow cooker. A 24-hour stovetop batch can cost $2.88 in electricity alone at average US rates, versus under $0.70 for a slow cooker.
  • Ignoring jar cost: Mason jars last years, so amortize them. 12 Ball wide-mouth pint jars cost about $12. Divide by 50+ batches and you get under 25 cents per batch. Still real money, just small.
  • Over-estimating yield: Beginners often expect a full pot to yield a full pot. Expect 15-30% loss to evaporation over long simmers. A tighter lid or Instant Pot eliminates most of this.
  • Comparing to the wrong product: If you make rich, collagen-heavy broth that gels when cold, compare to Kettle & Fire at $7+ per quart, not to watery store broth at $2.50.

Frequently Asked Questions

Are bones from the grocery store worth buying, or should I only use saved scraps?
Saved scraps are obviously the cheapest option. But beef knuckles, oxtail, and marrow bones bought at retail ($2-$5/lb) still produce broth that's cheaper per quart than premium store brands, as long as you use an efficient appliance like a slow cooker or pressure cooker and get a decent yield. Chicken feet ($1-$2/lb) are the single best value purchase for collagen: a pound of feet yields a deeply gelatinous broth with almost no flavor sacrifice.
Does an Instant Pot or pressure cooker change the economics significantly?
Yes, quite a bit. A pressure cooker draws 700-1,000W but runs only 3-4 hours for chicken or 4-6 for beef, compared to 18-36 hours in a slow cooker. Total electricity cost drops to $0.11-$0.38 vs $0.48-$0.96 for a slow cooker — but the slow cooker wins on electricity because its wattage is so low over many hours. The real advantage of a pressure cooker is time, not cost. The yield per batch is also typically lower because you use less water to stay under the fill line, so watch your quarts-per-batch closely.
How do I account for bones I would have thrown away anyway?
Enter $0 for bone cost. The calculator is designed for exactly this scenario. Your real cost is then aromatics (~$1.25), electricity ($0.30-$3.00 depending on appliance), and jars (~$0.25-$0.75). In this case, homemade bone broth almost always beats store-bought on cost — the question is just how much you save per quart.
What's a realistic quart yield from a standard slow cooker batch?
A 6-quart slow cooker filled to 5 quarts of water and 2-3 lbs of bones will yield 3.5-4.5 quarts after straining and a small amount of evaporation (slow cookers with a tight lid lose very little to steam). A 12-quart stockpot on the stovetop with 10 quarts of water can lose 2-3 quarts to evaporation over 24 hours, yielding 7-8 quarts. Enter your actual post-strain volume for the most accurate cost-per-quart figure.

Practical Guide for Bone Broth Cost Per Batch Calculator

The single biggest variable in homemade bone broth economics is whether your bones are free. If you save rotisserie chicken carcasses, pork rib bones, or beef roast bones in a freezer bag, your ingredient cost drops to nearly zero and the math almost always favors homemade. If you buy bones at retail from a standard grocery store, you need at least 4 quarts of yield per batch at premium store-bought prices to come out ahead. Most people land somewhere in between, mixing some purchased bones with saved scraps.

Appliance choice is the second-biggest lever and the one most people overlook entirely. A 200W slow cooker running 20 hours uses 4 kWh; a medium stovetop burner at 1,000W running the same 20 hours uses 20 kWh. At $0.16/kWh, that is $0.64 versus $3.20 — a $2.56 difference per batch. Over 50 batches per year, that gap is $128. If you currently simmer bone broth on the stovetop and switch to a slow cooker or Instant Pot, the appliance pays for itself in electricity savings within months for high-frequency brewers.

The hardest input to estimate accurately is jar cost. Glass mason jars are reusable for years, so the amortized cost per batch is low, but it is not zero. A 12-pack of wide-mouth quart jars costs roughly $14-$18. If each jar lasts 100 fill cycles before you retire it, that is $0.01-$0.02 per jar per use. Lids are the real consumable: standard flat lids should not be reused for pressure canning but can be reused for refrigerator storage. Budget $0.10-$0.15 per lid per batch for a realistic estimate.

Review Checklist

  • Use a slow cooker or Instant Pot instead of stovetop whenever possible — the wattage difference is the fastest way to cut cost.
  • Measure your actual post-strain yield (not estimated) and enter that number for an accurate cost-per-quart figure.
  • Compare your homemade cost only to store-bought broth of equivalent quality — gelatinous, organic, grass-fed broth is not the same product as $2.50 carton broth.
  • Track bone sources separately: log whether bones were free (saved) or purchased, so you can see your true average bone cost over time.