NaDCC to HOCl Calculator

NADCC Tablet Calculator for Encampments | HOCl Disinfectant Guide

260,000+ Unsheltered People in U.S.

~50% With Skin Conditions

<$0.25 Cost Per Gallon

Interactive Dosing Calculator

Select your tablet brand, desired concentration, and bottle size to calculate exactly how many tablets you need. This tool helps you provide safe, effective HOCl solutions for various applications.

Tablet Size (Available Chlorine) — Brand

Application (Concentration)

Bottle Size

Dosing Instructions

— Tablets Required

— Cost Per Batch

Price per tablet: —

— Concentration (PPM)

NADCC Tablet Comparison

Compare different brands and tablet sizes to find the most cost-effective option for your needs. Prices are approximate and based on bulk purchases.

Understanding Tablet Types

UNICEF/Generic Tablets: Unbranded tablets that meet international standards (NSF/ANSI 60, EN 12931:2000). Used by UNICEF, WHO, Red Cross, and most humanitarian organizations. Most economical option for encampments.
Standard Sizes: The 1.67g generic tablet (5L at 200ppm for $0.20-0.35/gallon) and 167mg UNICEF tablet are the workhorses of humanitarian water treatment and disinfection.
PurTabs: EPA-registered, NSF D2 certified for food contact surfaces, minimal chlorine odor, designed for electrostatic sprayers. Higher cost but specialized certifications.
EZ-Bleach: EPA-registered sporicidal disinfectant, 3-year shelf life, pH neutral, less corrosive than traditional bleach.
Aquatabs (branded): Premium water purification brand, individually sealed, popular for camping and personal emergency kits. Branded versions cost more than generic equivalents.

Brand / Type	Tablet Weight	Available Chlorine	Makes (at 200 ppm)	Est. Price	Cost/Gallon
UNICEF/Generic Humanitarian Tablets (Most Economical)
UNICEF 8.5mg	8.5mg	5mg	25ml at 200ppm	$0.05-0.10/tablet	$7.60-15.20
UNICEF 33mg	33mg	20mg	100ml at 200ppm	$0.01-0.03/tablet	$0.38-1.14
UNICEF 67mg	67mg	40mg	200ml at 200ppm	$0.01-0.03/tablet	$0.19-0.57
UNICEF 167mg Mid-Scale	167mg	100mg	500ml at 200ppm	$0.01-0.02/tablet	$0.08-0.15
Generic 1.67g Most Common	1.67g	1000mg (1g)	5 liters	$0.03-0.05/tablet	$0.20-0.35
Generic 4g Bulk	4g	2400mg (2.4g)	12 liters	$0.10-0.15/tablet	$0.30-0.48
UNICEF 8.68g Large Scale	8.68g	5208mg (5.2g)	26 liters	$0.25-0.35/tablet	$0.37-0.51
Branded Commercial Tablets
Ef-Chlor 2.5g	2.5g	1500mg (1.5g)	7.5 liters	$0.05-0.08/tablet	$0.25-0.40
PurTabs Small Food Safe	334mg	104mg (31.1%)	520ml	$0.50-0.80/tablet	$3.65-5.85
PurTabs Medium	3.3g	1026mg (31.1%)	5.13 liters	$0.40-0.60/tablet	$0.30-0.44
PurTabs Large	13.1g	4074mg (31.1%)	20.37 liters	$1.10-1.55/tablet	$0.20-0.29
EZ-Bleach EPA Reg	5g	1450mg (29%)	7.25 liters	$0.40-0.45/tablet	$0.21-0.24
Aquatabs 49mg Camping	49mg	5mg	25ml at 200ppm	$0.15-0.30/tablet	$22.70-45.40

🔄 Reverse Calculator

Calculate how much water your tablets can treat

Tablet Size (Available Chlorine) — Brand

Number of Tablets

Application (Concentration)

Water Volume Results

— Liters of Water

— Gallons of Water

— Total Cost

💡 Use Case Examples

Bulk Planning: "I have 200 tablets of 1.67g - how many gallons of 200ppm disinfectant can I make?"
Inventory Management: "With 50 PurTabs 13.1g tablets at 5ppm, how much drinking water can I purify?"
Supply Distribution: "One box contains 100 tablets - how much solution will that provide per encampment?"

Applications & Recommended Concentrations

HOCl is a versatile, non-toxic disinfectant that can address multiple health needs in encampment settings. Different concentrations are appropriate for different uses.

💧

Water Purification

2-10 PPM

Clear water: 2-5 ppm (1 tablet per 200L clear water). Cloudy/turbid water: 5-10 ppm (filter first, then double dose). Allow 30 minutes contact time before drinking.

🧴

General Skin Care

50 PPM

Daily hygiene and preventive skin care. Safe for frequent use on intact skin to prevent infections and maintain skin health.

🧽

Surface Disinfection

100-200 PPM

For cleaning surfaces, utensils, and general disinfection. Effective against bacteria, viruses, and fungi without harsh chemical residue.

🩹

Wound Care

100-200 PPM

For cleaning and treating minor wounds, cuts, and skin infections. Promotes healing while preventing infection without stinging.

🫁

Respiratory Support

50-100 PPM

For nasal irrigation and respiratory hygiene when properly diluted. Can help with congestion and respiratory health maintenance.

🏥

Medical Equipment

500-1000 PPM

For disinfecting medical instruments, equipment, and materials. Higher concentrations ensure thorough sterilization for medical use.

Why NADCC Tablets for Encampments?

NADCC (sodium dichloroisocyanurate) tablets offer a practical, affordable solution for critical health needs in underserved communities. When dissolved in water, NADCC releases hypochlorous acid (HOCl) — a powerful, safe disinfectant.

Proven Effectiveness

HOCl is clinically proven and EPA-approved. It's safer than bleach, non-toxic, and effective against a broad spectrum of pathogens including bacteria, viruses, and fungi.

Extremely Affordable

At less than $0.25 per gallon when using bulk tablets, HOCl is one of the most cost-effective disinfectant solutions available, enabling widespread access.

Multi-Purpose Solution

A single solution addresses disinfection, wound care, skin care, and respiratory health — reducing the need for multiple products and simplifying supply logistics.

Easy to Use

Simply dissolve tablets in water. No special equipment required. Stable tablets have a 3-5 year shelf life, making storage and distribution straightforward.

Urgent Need

With 260,000+ unsheltered people in the U.S. and ~50% experiencing skin conditions, providing access to safe disinfection is a critical public health intervention.

Prevents Serious Complications

Skin infections are a leading cause of hospitalization among unhoused individuals and can lead to severe complications including sepsis and amputation.

Important Safety Information

Always dissolve tablets in clean water. For cloudy water, filter first or let sediment settle.
Allow tablets to fully dissolve before use (typically 1-2 minutes with effervescent tablets).
Store tablets in a cool, dry place away from direct sunlight. Keep out of reach of children.
Do not mix with acids (like urine or vinegar) as this releases toxic chlorine gas.
Do not swallow tablets directly. Only use dissolved solutions as directed.
Solution is most stable at pH 5-6.8. Higher pH (>7) becomes less effective.
For maximum shelf life, store solution in opaque containers away from sunlight. Refrigeration extends potency.
Test concentration with chlorine test strips if storing for more than 7 days.
Avoid breathing dust or vapors when handling tablets.
For wound care, start with lower concentrations (50-100 ppm) and consult healthcare providers for serious infections.

Learn More About HOCl Solutions

Visit CONSPIRE.to for comprehensive information about making and using HOCl, including research, best practices, and additional resources for community health.

Visit CONSPIRE.to/aid →