Nitrite Residual Calculator

Work out nitrite residual instantly with clear inputs, formula shown and shareable results.

About Nitrite Residual Calculator

Ingoing nitrite in parts per million is nitrite mass divided by total batch mass. Most jurisdictions cap ingoing nitrite at 120-200 ppm depending on product. Nitrite depletes 60-80% during curing and cooking as it reacts with myoglobin and other meat components, so residual nitrite at sale is much lower than ingoing.

Formulas

Ingoing nitrite

Ingoing ppm = nitrite mass x 1,000,000 / total batch mass

Residual

Residual ppm = ingoing ppm x (1 - depletion %)

Worked example

With the default values below, Nitrite Residual Calculator returns Ingoing Nitrite of 1,524.39. Change any input above and every figure here is recalculated in your browser.

Inputs used

Meat Batch Massminimum 0 kg: 100 kg
Curing Salt Addedminimum 0 kg: 2.5 kg
Nitrite Content Of Curing Saltaccepts 0.01–100 %: 6.25 %
Nitrite Depletion During Processingaccepts 0–100 %: 70 %

Results

Ingoing Nitrite: 1,524.39
Residual Nitrite At Sale: 457.317
Nitrite Added: 156.2500
Curing Salt Level: 2.4390%

Step by step

1Values used
2Ingoing nitrite
3Residual
4Ingoing Nitrite= 1,524.39
5Residual Nitrite At Sale= 457.317
6Nitrite Added= 156.2500
7Curing Salt Level= 2.4390

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
Nitrite is toxic and its use is strictly limited by food law. Never exceed the permitted ingoing level for your product and jurisdiction, and always weigh cure accurately on a calibrated balance.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Nitrite is toxic and its use is strictly limited by food law. Never exceed the permitted ingoing level for your product and jurisdiction, and always weigh cure accurately on a calibrated balance.

Frequently Asked Questions

Why is nitrite used at all?

It inhibits Clostridium botulinum, develops cured colour and flavour, and retards rancidity. No single alternative replicates all four functions, which is why it remains permitted despite nitrosamine concerns.

What is the difference between the common cure salts?

Prague powder number 1 and similar cures are 6.25% sodium nitrite in salt, for cooked products. Cure number 2 adds nitrate for long dry-cured products where slow nitrite release is needed.