Calculate exact amounts of sea salt, pink curing salt (Prague Powder No. 1), sugar, and water for perfect homemade bacon. Dry cure equilibrium method or wet brine — with USDA nitrite ppm display and curing time by meat thickness.
Equilibrium dry curing applies a precise percentage of salt to the meat weight. The meat absorbs exactly the calculated salt — no over-salting, no rinsing needed. Vacuum-seal and refrigerate for the full cure time.
Enter meat weight (min 100g).
Brown sugar, white sugar, or maple syrup
Required for food safety when cold smoking
Thickest point in mm (e.g. 50 for 2 inch belly)
Sea Salt Needed
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⚠️ Food Safety Disclaimer: Curing salt (sodium nitrite) is toxic in large quantities — always use a gram-accurate scale (0.1g resolution). Keep curing salts clearly labeled and away from children. These calculations are based on USDA guidelines for equilibrium curing. Always refrigerate curing meat at 1–4°C (34–40°F). Cook bacon to 70°C (160°F) internal temperature before eating.
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Wet brine curing submerges the pork belly in a salt solution. Faster cure penetration than dry cure. Water amount is calculated as a percentage of meat weight — adjust based on your container size.
Enter meat weight (min 100g).
Adjust to fully submerge meat in your container
For curing time calculation
Water for Brine
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⚠️ Food Safety Disclaimer: Always weigh curing salt with a gram-accurate scale. Never use iodized salt in curing — iodine inhibits curing reactions and produces off-flavors. Submerge meat fully and weight it down in the brine. Refrigerate throughout at 1–4°C.
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Calculate how many days to cure bacon based on meat thickness and curing method. Uses the standard 1 day per 6mm (1/4 inch) rule plus a 2-day safety buffer for equilibrium curing.
Measure thickest point of the slabEnter thickness between 5 and 250 mm.
Enter date to calculate ready date
Days to Cure
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⚠️ Safety Note: These are minimum recommended curing times. Never under-cure bacon — insufficient cure time means nitrite has not fully penetrated the center of thick cuts, creating food safety risk. When in doubt, add 1-2 extra days.
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Sources & Methodology
All curing salt calculations are based on USDA regulations for ingoing nitrite and equilibrium curing principles validated by the USDA Food Safety and Inspection Service. Pink curing salt percentage (0.25%) delivers approximately 156 ppm ingoing nitrite, meeting the USDA minimum requirement of 120 ppm.
Source
Coverage
Reference
USDA FSIS — 9 CFR 424.22
Maximum ingoing nitrite: 200 ppm cured bacon; minimum: 120 ppm
Equilibrium curing method, thickness-based curing time rule
Published culinary reference
// Bacon curing formulas Sea salt = Meat weight x Salt% Prague Powder No. 1= Meat weight x 0.0025 (always 0.25%) Ingoing nitrite ppm= (PP1 weight x 0.0625) / Meat weight x 1,000,000 Sugar = Meat weight x Sugar% Cure days (dry) = (Thickness mm / 6) + 2 buffer days Cure days (wet) = (Thickness mm / 6) x 0.7 + 1 buffer day
Complete Guide to Curing Bacon at Home
Making homemade bacon from a fresh pork belly is one of the most rewarding projects in home cooking and charcuterie. The result — deeply flavored, perfectly salted, freshly smoked bacon — bears no comparison to commercial bacon and requires only a few ingredients: pork belly, sea salt, pink curing salt, optional sugar, time, and a smoker or oven. The key to perfect results every time is using precise, weight-based measurements — which is exactly what this bacon curing calculator provides.
Equilibrium Curing: The Modern Method for Perfect Bacon
Traditional bacon curing used the "over-salt and rinse" approach — applying far more salt than needed, then soaking out the excess. This was inconsistent and produced unpredictable saltiness. Equilibrium curing, developed in professional charcuterie kitchens and now standard among home curers, solves this entirely. You apply a precisely calculated percentage of salt relative to the exact weight of the meat, vacuum-seal it in a bag, and refrigerate. The salt gradually migrates into the meat until equilibrium is reached — and the meat absorbs exactly the amount of salt you calculated, no more. When the cure time is up, there is no excess salt to rinse out. The result is consistently flavored bacon, every single time.
The equilibrium cure mix for standard bacon: 2.25% sea salt + 0.25% Prague Powder No. 1 + 1% sugar (all percentages of meat weight). For a 1kg (1000g) pork belly: 22.5g sea salt + 2.5g Prague Powder No. 1 + 10g sugar. Mix the dry ingredients, rub evenly over all surfaces, seal in a zip-lock or vacuum bag, and refrigerate for the calculated cure time — flipping daily is optional but helps even distribution.
Understanding Pink Curing Salt: Safety First
Pink curing salt (Prague Powder No. 1, Curing Salt No. 1, Instacure No. 1) is a mixture of 6.25% sodium nitrite and 93.75% table salt, dyed pink to prevent confusion with plain salt. Sodium nitrite is the active preservative — it inhibits the growth of Clostridium botulinum (botulism bacteria), prevents oxidation (lipid rancidity), develops the characteristic pink cured color (through reaction with myoglobin to form nitrosomyoglobin), and contributes the distinctive "cured" flavor.
The USDA standard for bacon requires a minimum of 120 ppm and maximum of 200 ppm of ingoing sodium nitrite. The equilibrium method at 0.25% Prague Powder No. 1 delivers approximately 156 ppm — safely within the legal and safe range. Sodium nitrite is toxic in large quantities, which is why precise measurement with a gram-accurate scale (0.1g resolution recommended) is non-negotiable. Never estimate, never use tablespoons for curing salt.
Bacon Curing Time: The Thickness Rule
Salt and nitrite penetrate meat at a predictable rate — approximately 6mm (1/4 inch) of depth per day. For a slab of pork belly that is 50mm (2 inches) thick at its thickest point, the calculation is: 50mm / 6mm per day = 8.3 days, rounded to 9 days, plus a 2-day safety buffer = 11 days total minimum cure. This ensures the salt and nitrite have fully penetrated the center of the meat for consistent flavor and food safety.
Skin-on pork belly requires approximately 15% more cure time because intact skin significantly slows salt penetration. A 50mm belly with skin on should cure for approximately 12–13 days. Wet brine curing penetrates slightly faster than dry curing because the liquid medium carries salt and nitrite into the meat more efficiently — use the dry cure time multiplied by 0.7 as your wet brine guideline.
Dry Cure vs Wet Brine: Which Method Is Right for You?
Dry cure equilibrium curing produces more concentrated flavor, better smoke surface adhesion, and less textural change from water absorption. It takes longer but produces most chefs' preferred bacon. Refrigerator space requirement is minimal — just the sealed bag flat on a shelf. Wet brine curing is faster, more forgiving with irregular shapes (the liquid covers every surface evenly), and produces a juicier finished product. The brine dilutes flavor slightly compared to dry cure. Both methods are equally safe when using correct nitrite amounts.
For beginners, dry cure equilibrium curing is recommended — it is simpler (no brine solution to mix), requires no heavy container, and the results are highly consistent. For large, bone-in pieces like a full ham, wet brine is often preferred because bones interfere with even dry cure application.
Smoking Bacon: Hot Smoke vs Cold Smoke
Hot smoking (65–80°C / 150–176°F chamber temperature) cooks the bacon as it smokes. Run for 2–6 hours depending on smoke intensity desired, until internal temperature reaches 65°C (149°F). The result is ready-to-eat bacon that still benefits from a quick pan-fry. Hot-smoked bacon has a slightly softer texture with a fully developed smoke flavor.
Cold smoking (below 30°C / 86°F) adds smoke flavor without cooking the meat. Cold-smoked bacon must be pan-fried before eating. CRITICAL: cold smoking creates warm, low-oxygen conditions that are ideal for Clostridium botulinum growth — which is why pink curing salt (nitrite) is non-negotiable for cold-smoked bacon. Never cold-smoke bacon without nitrite cure. Pellicle formation (air-drying the cured bacon unwrapped on a rack in the refrigerator for 8–24 hours before smoking) is essential for both methods to achieve good smoke adhesion and prevent case hardening.
Customizing Your Bacon Cure: Sugar, Spices, and Flavors
The base cure of salt and pink salt is the foundation. Sugar adds a counterpoint to saltiness and promotes caramelization during pan-frying — brown sugar, white sugar, maple syrup, and honey all work. Common additions: cracked black pepper (0.5% of meat weight), red pepper flakes (for spicy bacon), crushed juniper berries (for a European-style cure), dried herbs (rosemary, thyme, bay leaf), garlic powder (0.5%), and smoked paprika. For maple bacon, substitute maple syrup for sugar at 1.3x the sugar weight — maple syrup is approximately 66% sugar.
Frequently Asked Questions
Use 2.5g of Prague Powder No. 1 per 1kg (1000g) of pork belly. This is 0.25% of the meat weight. Always weigh on a gram-accurate scale — do not measure by volume. This delivers approximately 156 ppm ingoing nitrite, which is within the USDA safe range of 120–200 ppm. The formula: meat weight in grams x 0.0025 = grams of Prague Powder No. 1. For 2.5kg belly: 2500 x 0.0025 = 6.25g PP1.
Calculate: 1 day per 6mm (1/4 inch) of thickness at the thickest point, plus 2 days safety buffer. A 50mm (2 inch) thick pork belly takes (50/6) = 8.3 days + 2 days = minimum 10-11 days. A 38mm (1.5 inch) belly takes 6.3 + 2 = 8-9 days. Always cure for at least 7 days regardless of thickness. For skin-on bellies, add 15% more time. Never under-cure — insufficient cure means uneven salt and nitrite distribution.
Prague Powder No. 1 (Curing Salt No. 1, Instacure No. 1, Pink Salt): 6.25% sodium nitrite + 93.75% salt. Used for short cures under 30 days — bacon, ham, corned beef, sausages. Prague Powder No. 2: 6.25% sodium nitrite + 4% sodium nitrate + 89.75% salt. Used for long cures over 30 days — prosciutto, salami, bresaola. For bacon, ALWAYS use Prague Powder No. 1 — it is the correct product for under-30-day cures. Never use PP2 for bacon.
You can make salt-cured pork belly without nitrite, but it is not technically bacon and comes with important restrictions. Without nitrite: it lacks the characteristic pink color and cured flavor, it CANNOT be cold-smoked (botulism risk), it has a shorter refrigerator shelf life (5-7 days vs 3 weeks), and it should be cooked to full doneness. Salt-only cured belly is fine for fresh consumption when cooked thoroughly. For cold smoking or any recipe where bacon won't be cooked to 70°C, nitrite cure is essential.
With equilibrium curing, the calculated cure time guarantees full cure — no additional testing is needed. Visual verification: slice a thin piece from the thickest part and inspect the cross-section. Fully cured meat shows a consistent pink-red color from edge to center with no grey uncured core. The meat should have a firm, dense texture throughout. If you see a grey center, return to the cure for 2-3 more days and recheck. Taste test: fry the test slice — it should taste evenly salted throughout, not salty on the outside and bland inside.
Use fine or medium sea salt, kosher salt (not flaked), or non-iodized table salt. NEVER use iodized salt for curing — iodine inhibits the curing reactions, produces unpleasant metallic off-flavors, and can interfere with nitrite effectiveness. Avoid salt with anti-caking agents if possible, though small amounts are generally acceptable. Sea salt and kosher salt are the most common choices for home curers. Flaked kosher salt like Diamond Crystal is too light in volume — always weigh in grams, never measure by volume.
Cure at 1–4°C (34–40°F) — standard refrigerator temperature. This is critical: temperatures above 4°C accelerate bacterial growth and can cause spoilage before curing is complete. Temperatures at or near 0°C slow salt penetration but remain safe. Never cure at room temperature. The sealed bag should be flat on a shelf with no stacking of heavy items on top. Flip the bag daily to redistribute any liquid that accumulates and ensure even contact between cure and meat.
After curing is complete, remove the pork belly from the bag, rinse lightly if desired (many skip this step with equilibrium curing), and pat dry. Place it on a wire rack uncovered in the refrigerator for 8–24 hours. Air circulation forms a pellicle — a thin, tacky, slightly firm protein layer on the surface. The pellicle is essential for smoking: it provides a sticky surface for smoke particles to adhere, prevents case hardening, and reduces surface moisture that would create steam and produce a less effective smoke. Never skip pellicle formation before smoking.
For maple bacon, replace the sugar in the cure with pure maple syrup. Use approximately 1.3x the weight called for in sugar (maple syrup is about 66% sugar). For 1kg belly at 1% sugar: instead of 10g sugar, use 13g (about 1 tablespoon) of maple syrup. Mix with the dry cure ingredients into a paste and apply. The maple sugars caramelize beautifully during smoking and pan-frying. For stronger maple flavor, brush additional maple syrup on the belly surface during the last 30 minutes of hot smoking.
Yes — pork belly freezes and thaws well. Thaw completely in the refrigerator (24-48 hours per kg) before curing. The meat must be fully thawed — ice crystals prevent even salt penetration. After thawing, pat dry with paper towels before applying dry cure, as surface moisture dilutes the cure. Freezing does not affect the curing process once the meat is fully thawed. Many home curers buy pork belly in bulk, freeze in 1-2kg portions, and cure batches as needed.
Best woods for bacon: Apple (sweet, mild, universally liked — best for beginners), Hickory (strong classic American BBQ smoke, traditional for bacon), Cherry (slightly fruity, excellent color, popular in competition BBQ), Maple (sweet smoke, complements maple-glazed bacon), Pecan (mild, nutty, similar to hickory but smoother). Always avoid softwoods — pine, spruce, cedar, fir — they contain resins that produce acrid, turpentine-like flavors. Avoid mesquite — it is too intense and bitter for the delicate bacon flavor. Use small amounts of wood — smoke is best light to medium intensity for bacon.
Refrigerator: 2-3 weeks wrapped tightly in plastic wrap or vacuum-sealed. Freezer: up to 3 months for best quality (up to 6 months is safe but quality declines). Slice before freezing and separate portions with parchment paper. Once opened from vacuum seal, use within 1 week. Homemade bacon lacks the secondary preservatives in commercial bacon (sodium erythorbate, smoke flavor, sodium phosphate) so it has a shorter shelf life. Signs of spoilage: slimy texture, off odor, or visible mold — discard immediately.
Set smoker chamber temperature to 65–80°C (150–176°F). Smoke for 2–6 hours depending on desired smoke intensity — 2 hours for mild, 4 hours for medium, 6 hours for strong smoke flavor. Monitor internal meat temperature and remove from smoker when the thickest part reaches 65°C (149°F). This produces fully cooked, food-safe bacon. After smoking, cool completely at room temperature for 30 minutes, then refrigerate for at least 4 hours (ideally overnight) before slicing — the smoke flavor develops and the fat sets during this rest period.
American streaky bacon comes from pork belly — the fatty layered cut under the ribs. It is the most popular style with fat-to-lean ratio producing characteristic crispy strips. Canadian or back bacon comes from pork loin — leaner, thicker, round slices. British back bacon is similar but includes a small attached belly section, giving both a lean eye and a fat strip. Italian pancetta is also from pork belly, cured but not smoked, used in cooking. All use the same 0.25% Prague Powder No. 1 + 2.25% salt equilibrium cure formula regardless of cut.
With equilibrium curing, over-salting is nearly impossible when you calculate correctly. Use 2.0–2.25% sea salt for a milder result. If your previous batch was too salty: reduce the salt percentage by 0.25% next time, verify you calculated from meat weight (not total cure mix weight), and ensure you used the correct percentage and weighed accurately. With the traditional excess-salt method, soak the cured belly in cold water for 30-minute intervals until a test slice fries to your preferred saltiness. Equilibrium curing eliminates this problem entirely.