Wash Formula Calculator

Detergent dosing and cycle settings by load and soil level.

Inputs

Load size (lb)

Soil level (0-2)

Water hardness (gpg)

Water temp (F)

Tab to move between fields

Results

Detergent (oz)

19.88

Water (gal)50

Bleach (cups)0

Softener (oz)2.5

Cycle time (min)40

How to Use This Calculator

Enter the wash load weight in pounds.
Select the soil level (0=light, 1=medium, 2=heavy) to adjust chemistry dosage.
Input the water hardness in grains per gallon and wash temperature in °F.
Review the recommended detergent dose in ounces, along with water usage in gallons and fabric softener in ounces.
Check the bleach amount (added only for heavy soil loads) and the recommended cycle time in minutes.

How the result changes with Load size (lb)

Load size (lb)	Detergent (oz)
21	16.7
71	56.45
130	103.35
180	143.1

What each input means

Load size (lb): Weight of the laundry load in pounds.
Soil level (0-2): 0=Light, 1=Medium, 2=Heavy soiling.
Water hardness (gpg): Water hardness in grains per gallon.
Water temp (F): Wash water temperature in Fahrenheit.

What each result means

Detergent (oz): Recommended liquid detergent in ounces.
Water (gal): Approximate water usage per cycle.
Bleach (cups): Chlorine bleach cups (heavy soil only).
Softener (oz): Fabric softener in ounces.
Cycle time (min): Recommended wash cycle duration.

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Load size (lb) = 25, Soil level (0-2) = 1, Water hardness (gpg) = 8, Water temp (F) = 120 = 4 input(s) provided
Calculate Detergent
Detergent
19.88 = 19.88
Calculate Water
Water
50 = 50
Calculate Bleach
Bleach
0 = 0

Engine last updated August 6, 2026. Checked against 3 independently-derived tests — how we verify calculators.

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