How to Calculate Curing Salt: Prague Powder PPM Guide
By UpnixTools · Updated November 4, 2026 · 7 min read
Safety first: Curing salt contains sodium nitrite, which prevents botulism in cured meats — but the dose matters enormously. Too little and the cure may not protect you; too much and it is toxic. Always weigh curing salt on a precision scale (0.1 g) and never exceed the limits in this guide.
Making bacon, sausage, or salami at home is deeply satisfying — until you face the one question every charcuterie beginner dreads: how much pink curing salt do I actually use? Recipes disagree, forum answers contradict each other, and the stakes are real: nitrite is what keeps cured meat safe from Clostridium botulinum, but it is also toxic in excess. The good news is that the math is exact, simple, and the same every time.
Prague Powder #1 vs #2: which one do you need?
This is the first decision, and it matters more than the amount:
Prague Powder #1 (also called pink salt, Instacure #1): 6.25% sodium nitrite + 93.75% table salt. For short cures — bacon, fresh sausage, ham, pastrami — anything cooked, smoked, or eaten within days or weeks.
Prague Powder #2 (Instacure #2): 6.25% nitrite + 4% nitrate + salt. For long dry-cured products only — salami, prosciutto, coppa aged for months. The nitrate slowly converts to nitrite over the long aging period.
Rule of thumb: if you will eat it within a month, use #1. If it hangs in a curing chamber for months, use #2. Never substitute #2 for #1 in short cures.
The formula
Curing is measured in PPM (parts per million) of nitrite in the meat. The calculation:
The 0.0625 is the 6.25% nitrite concentration in Prague Powder. Worked example — 2.5 kg of pork belly for bacon at 156 PPM:
Meat in grams: 2.5 × 1,000 = 2,500 g
Nitrite needed: 2,500 × 156 ÷ 1,000,000 = 0.39 g of pure nitrite
Prague Powder #1 needed: 0.39 ÷ 0.0625 = 6.24 g
That is it — about a teaspoon and a quarter for 2.5 kg of belly. Notice how small the amount is: this is why a precision scale is non-negotiable.
Standard PPM targets
Product
Typical target
Notes
Fresh sausage
120 PPM
Cooked soon after making
Bacon (US standard)
156 PPM
The most common reference point
Ham, pastrami
156–200 PPM
Brined or injected cures
Dry-cured salami
156–200 PPM (#2)
Nitrate in #2 covers the long aging
USDA maximum (#1)
200 PPM
Never exceed for short cures
Common mistakes to avoid
Measuring by volume. A teaspoon of curing salt can weigh anywhere from 4 to 7 g depending on grain and packing. At these tiny quantities, that error is dangerous. Weigh everything.
Confusing curing salt with table salt. Prague Powder is dyed pink precisely so you never mistake it for regular salt. Keep it labeled and away from the cooking salt.
Scaling recipes blindly. "Double everything" works for the cure too — but only if you scale by meat weight, the way the formula does. Never scale cure by "feel."
Using #2 for bacon. The nitrate in #2 has no business in a product eaten in two weeks. It is for months-long dry aging only.
Skipping the cure "to be natural." Celery powder cures still contain nitrite (from the celery) in uncontrolled amounts. If you cure meat, use measured Prague Powder — it is the safer, more precise option.
A note on total salt
Prague Powder is only the nitrite delivery vehicle — it is not your total salt. A typical bacon cure is ~2.5% total salt by meat weight, of which the 6.24 g of Prague Powder is a small fraction; the rest is regular kosher/sea salt plus sugar and spices. Calculate the cure with the formula above, then build your total salt target around it.
At the standard 156 PPM bacon target, 2.5 g of Prague Powder #1 per kg of meat. The exact amount depends on your target PPM — use the calculator above for any target.
Can I use too much curing salt?
Yes, and it is dangerous. Never exceed 200 PPM ingoing nitrite with Prague Powder #1. Excess nitrite can cause methemoglobinemia. Always weigh with a 0.1 g precision scale.
What happens if I use too little?
The cure may fail to inhibit Clostridium botulinum, especially in low-oxygen environments like sealed sausages or thick cuts. Under-curing is a food safety risk — measure carefully.
Is pink salt the same as Himalayan pink salt?
No! "Pink salt" in charcuterie means Prague Powder (curing salt with nitrite). Himalayan pink salt is just colored table salt with no nitrite — it will not cure meat safely.
Do I need curing salt for jerky?
For jerky dried quickly at proper temperatures, many recipes skip nitrite. But for any ground-meat jerky or slow-dried product, cure is strongly recommended for botulism protection.