AWP Labs · Chemistry
Chemical dosing calculator
Uses the pounds formula to convert a target dose into daily chemical use, feed pump rate and how long a drum or tote will last.
Your inputs
Sets a typical strength, specific gravity and starting dose. Adjust any of them below.
As active chemical, in the treated water.
Results
Product to feed
8.05gal/day
78.6 lb/day of product as delivered
- Active chemical
- 8.41lb/day
- 3.81 kg/day
- Feed pump rate
- 21.2mL/min
- 0.335 gal/hour
- Monthly use
- 245gal
- Annual use
- 2,939gal
- 28,677 lb
How long a container lasts
Hypochlorite loses strength in storage, so check the actual concentration of older stock. Suppliers quote 12.5% as trade percent (grams of available chlorine per litre ÷ 10). Enter strength as percent by weight.
How this is calculated
The pounds formula. lb/day = Flow (MGD) × Dose (mg/L) × 8.34.
Product. Product lb/day = Active lb/day ÷ (Strength % ÷ 100), then gal/day = Product lb/day ÷ (Specific gravity × 8.34).
Pump setting. mL/min = gal/day × 3,785 ÷ 1,440.
Assumptions
- Dose is expressed as active chemical in the treated flow.
- Strength is percent by weight of the delivered product.
- One gallon of water weighs 8.34 lb.
A preliminary estimate for planning. AWP confirms every figure against your water, site and permit before quoting.
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