Gluten-Free Flour Conversion Formula

Understand the math behind the gluten-free flour conversion. Each variable explained with a worked example.

Use the Gluten-Free Flour Conversion

Formulas Used

Gluten-Free Flour

gf_flour_g = wheat_flour_g * blend_type

Xanthan Gum (if not in blend)

xanthan_tsp = wheat_flour_g / 125

Extra Liquid (coconut flour only)

extra_liquid_ml = (blend_type == 0.75) * wheat_flour_g * 0.5

Variables

VariableDescriptionDefault
wheat_flour_gWheat Flour Amount(g)250
blend_typeGF Blend Type1

How It Works

How to Convert to Gluten-Free Flour

General Rules

  • 1:1 GF blends: Replace wheat flour gram for gram. These blends include xanthan gum.
  • Rice flour blend: Use about 90% the weight. Add 1/2 tsp xanthan gum per cup.
  • Almond flour: Use 115% the weight. Results are denser and moister.
  • Coconut flour: Use 75% the weight but add 50% more liquid. Coconut flour is very absorbent.

    • Binding

    Gluten provides structure. Without it, add xanthan gum (1/2 tsp per cup of flour for cookies, 1 tsp for bread) unless the GF blend already contains it.

    Worked Example

    Convert 250 g wheat flour to a 1:1 GF blend.

    wheat_flour_g = 250blend_type = 1
    1. 01GF flour: 250 x 1 = 250 g (same weight).
    2. 02Xanthan gum (if needed): 250 / 125 = 2 tsp.
    3. 03Most commercial 1:1 blends already include xanthan gum.

    Frequently Asked Questions

    Can I just replace flour 1:1?

    With a commercial 1:1 GF blend (like Bob Red Mill 1-to-1), yes. With single flours (rice, almond, etc.), you need to adjust ratios and add binding agents.

    Why is xanthan gum needed?

    Xanthan gum mimics the binding and elasticity that gluten provides. Without it, GF baked goods tend to be crumbly.

    Does GF flour affect taste?

    Slightly. GF blends may taste slightly different or have a grittier texture. High-quality blends minimize this. Rice flour tends to be the most neutral.

    Ready to run the numbers?

    Open Gluten-Free Flour Conversion