1 ounce of Peanut Butter in grams

1 ounce of peanut butter = 28.3 grams. That's based on a 258 g per cup baseline. Use this as a practical baseline for repeatable recipe scaling when grind size and settling changes between brands.

Reviewed by CupOrGram Editorial TeamData methodology: NIST-derived density references + recipe testing notesMethodology
Answer
28.3 grams
Based on peanut butter density of 1.08 g/ml
Source: NIST-DB-72
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Ingredient Guide

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Quick Reference Table

ouncesgrams
1 ounces28.3 grams
2 ounces56.7 grams
4 ounces113 grams
8 ounces227 grams
16 ounces454 grams

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Ingredient-specific, density-based conversions for baking

28.3
grams
Ingredient-specific · density-based
Density-specific references, not generic cup charts · NIST-DB-72

Why this conversion varies

Peanut Butter measurements vary with grind, chop size, and packing.

  • Coarse pieces leave more air gaps than fine grinds.
  • Settling and compression can increase cup weight quickly.
  • This page uses a consistent 258 g per cup baseline for repeatable conversions.

Why this conversion matters

Peanut Butter can behave differently by brand and handling. Converting peanut butter with a consistent baseline gives you a more dependable starting point for scaling recipes.

Practical baking use

Ground roasted peanuts, sometimes with added salt, sugar, and oil. Dense and protein-rich. Use this conversion as a practical starting point for scaling recipes with peanut butter.

  • If consistency matters, verify with a small test batch first.
  • Use weight-based measurements when precision is critical.

FAQ

How much is 1 ounce of peanut butter in grams?

1 ounce of peanut butter is 28.3 grams using a 258 g per cup baseline.

Why do chopped and ground peanut butter measure differently?

Peanut Butter measurements vary with grind, chop size, and packing. In practice, grind size and settling can shift results between kitchens.

Can I use this conversion for recipe scaling?

Yes. This page is built for scaling, but check texture and hydration after the first test batch when grind size and settling changes.

Related links for Peanut Butter

Recipe Context for Peanut Butter

For nut flours: weigh to avoid dry or greasy texture swings.

For seed gels: hydration ratio directly affects binding strength.

For toppings: weight gives consistent coverage and bake color.

Common Pitfalls

  • Switching brands without re-checking weight can change texture and bake time.
  • Using volume-only measurements for dense ingredients can overshoot recipe targets.

Brand Variance Example

Baseline on this page: 1 cup peanut butter = 258g. Real-world range can shift by about 9% because cut size, grind consistency, and oil content alter packing behavior.

Example for 2 cups: baseline 516g, common range 470g-562g. If your bake is texture-sensitive, start with the lower bound and adjust after a test batch.

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