Prague Powder #1 to Nitritpökelsalz (NPS) Converter
Translate American curing recipes calling for Prague Powder #1 (6.25% Nitrite) into European Nitritpökelsalz / Peklosol (0.6% Nitrite) with exact metric precision.
US Prague Powder #1 contains 6.25% sodium nitrite, while European Nitritpökelsalz (NPS / Peklosol) contains only 0.5% to 0.6% sodium nitrite. Using Cure #1 at European quantities causes toxic chemical poisoning, while using European NPS at American quantities leaves meat completely uncured.
Marianski osmotic diffusion model: Vacuum-sealed bag maintains 100% moisture contact for continuous inward salt absorption.
How the American vs. European Curing Systems Work
Home curers outside the United States (in the UK, Germany, Poland, Austria, and Australia) frequently encounter American BBQ recipes calling for Prague Powder #1. Here is the mathematical difference:
| Parameter | United States (Prague Powder #1) | European Union (Nitritpökelsalz / NPS) |
|---|---|---|
| Sodium Nitrite Concentration | 6.25% NaNO₂ (Concentrated) | 0.5% to 0.6% NaNO₂ (Pre-blended) |
| How It Is Added | Added as a micro-ingredient (0.25%) + standard salt | Used as the entire salt portion (2.2%–2.5%) |
| Dosage per 1,000g Meat | 2.50g Cure #1 + 19.7g Kosher Salt | 22.0g to 25.0g pure NPS (No extra salt!) |
| Resulting Ingoing Nitrite | ~156 PPM Nitrite | ~132 to 150 PPM Nitrite |
The Mathematical Conversion Formula
If an American recipe asks for 1,000g of pork belly with 20g salt and 2.5g Prague Powder #1, how do you convert it to European NPS?
Step 1: Discard the standard kosher/sea salt completely.
Step 2: Use Nitritpökelsalz (0.6%) as 100% of your salt target (e.g., for a 2.2% salt cure on 1,000g meat, use 22.0g NPS).
Step 3: Keep sugar and spice quantities unchanged.
Frequently Asked Questions (US vs EU Curing Salts)
Can I mix regular table salt with European NPS?
No. Because European NPS is already diluted to 0.6% sodium nitrite, it is engineered to be used as your sole salt source at 2.0% to 2.5% of total meat weight. If you mix standard salt with NPS, you dilute the nitrite concentration below the minimum statutory threshold needed to inhibit Clostridium botulinum.
Is Polish Peklosol the same as German Nitritpökelsalz?
Yes. Polish Peklosol, German Nitritpökelsalz (NPS), and French sel nitrité all comply with EU Regulation (EC) No 1333/2008, standardized between 0.5% and 0.6% sodium nitrite mixed into pure vacuum salt.
Why does Europe use 0.6% NPS while the US uses 6.25% Cure #1?
Safety regulations. European food authorities mandate that curing salts sold to home cooks and butchers be pre-diluted to 0.6%. At 0.6%, it is physically impossible to poison food with excess nitrite without making the meat so brutally over-salty that it is inedible. The US system requires cooks to accurately weigh concentrated Cure #1 (6.25%) on a 0.01g pocket scale.
Explore Curing Guides
View the Curing Salt Matrix, see our guide on Prague Powder #1 vs #2, or use the Bacon Cure Calculator.