Original mass
Original ingredient · g
Allowed range: 0.001 to 10000000
Compare masses by entered fat content and show the nonfat difference.
Open this toolButter and oil contain different shares of fat. Matching fat mass can reveal why equal ingredient weights are not always equivalent.
Enter both fat percentages and compare the masses needed to match the fat amount. Review the nonfat difference before changing the recipe.
Original ingredient · g
Allowed range: 0.001 to 10000000
Original ingredient · %
Allowed range: 0 to 100
Replacement ingredient · %
Allowed range: 0.01 to 100
The comparison keeps fat content separate from ingredient mass, giving you a clearer basis for evaluating a substitution.
Matching fat mass is not a guaranteed baking substitution. Nonfat material is not automatically water, and texture and emulsification can differ.
Matching fat mass is not a guaranteed baking substitution. Nonfat material is not automatically water, and texture and emulsification can differ.
No. Water content, emulsification and texture may differ. Treat the result as a mass comparison rather than a complete substitution rule.
Check Original mass, Original fat content and Replacement fat content. Use the exact units shown beside the controls and replace any example values with your own inputs.
Source page last modified: 2026-10-01T16:12:30+00:00. This profile describes the tool; use its page to run it.
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