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Quart Mason Jar Capacity — 4 Cups (32 oz) Size Guide

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Quart Mason Jar = 32 fluid ounces

Quart Mason Jar = 4 cups (946 ml)

Overview

Quart Mason Jar holds 32 oz = 4 cups = 946 ml. Best for whole tomatoes, large batch soups, fruits. Complete canning jar size reference.

Key Details

  • Quart Mason Jar = 32 fluid ounces
  • Quart Mason Jar = 4 cups (946 ml)
  • Best used for: whole tomatoes, large batch soups, fruits
  • Requires longer processing time than pints — check tested recipes
  • Leave 1/4 to 1/2 inch headspace when filling jars for canning

Why This Matters

  • Canning recipes specify jar sizes for safe processing times
  • Knowing jar capacity helps calculate batch yields
  • Proper jar size ensures correct heat penetration during processing

How To

  1. 1Quart Mason Jar holds 32 oz (4 cups)
  2. 2Best for: whole tomatoes, large batch soups, fruits
  3. 3Requires longer processing time than pints — check tested recipes
  4. 4Always use tested recipes with correct jar sizes for food safety
  5. 5Check jar rims for chips before canning — damaged rims prevent sealing

Tags

unit-conversionsvolumecanningmason-jarpreservingjar-sizes

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Frequently Asked Questions

A quart mason jar holds 4 cups (32 oz / 946 ml).