E-Juice Calculator

E-liquid nicotine concentration is measured in milligrams per milliliter (mg/mL), also expressed as percentages where 1% equals 10 mg/mL. Common commercial strengths include: 0 mg/mL (0%) - nicotine-free, for users who have tapered to zero nicotine but enjoy vaping; 3 mg/mL (0.3%) - very low strength for light smokers or those nearly nicotine-free; 6 mg/mL (0.6%) - low strength for former light smokers (less than 10 cigarettes daily) using sub-ohm devices; 12 mg/mL (1.2%) - medium strength for moderate smokers (10-20 cigarettes daily) or light smokers using pod systems; 18 mg/mL (1.8%) - high strength for heavy smokers (pack-a-day) using standard devices; 24 mg/mL (2.4%) - very high strength for very heavy smokers during initial cessation; 50-59 mg/mL (5-5.9%) - nicotine salt formulations for pod systems, delivering rapid nicotine absorption similar to cigarettes. Calculating nicotine delivery: If you vape 5 mL daily of 6 mg/mL liquid, total nicotine = 5 × 6 = 30 mg nicotine per day. For comparison, one cigarette delivers approximately 1-2 mg absorbed nicotine, so 30 mg vaping roughly equals 15-30 cigarettes in nicotine exposure, though cigarettes contain additional harmful compounds absent in e-liquid. Device type matters significantly: Sub-ohm devices (resistance <1 ohm) produce massive vapor clouds and deliver nicotine very efficiently—users need 3-6 mg/mL to avoid nicotine overdose. Standard vape pens (1.0-2.5 ohm) use moderate wattage and work well with 6-12 mg/mL. Pod systems and mouth-to-lung devices produce less vapor, mimicking cigarette draw, and typically use 12-24 mg/mL freebase nicotine or 20-50 mg/mL nicotine salts. Strength adjustment example: A pack-a-day smoker switching to vaping might start with 18 mg/mL in a standard device, vaping 4-5 mL daily (72-90 mg total nicotine). After 2-3 months, reduce to 12 mg/mL, then 6 mg/mL over 6-12 months, eventually reaching 3 mg/mL or 0 mg/mL. The calculator helps users determine: (1) Total nicotine intake from current habits; (2) Required concentration when switching device types; (3) Dilution ratios when mixing different strengths to achieve target concentration.

E-liquids consist of two primary base ingredients: Propylene Glycol (PG) and Vegetable Glycerin (VG), with ratios expressed as PG:VG percentages that dramatically affect vaping experience. Propylene Glycol (PG) is a thin, flavorless liquid that provides: (1) Throat hit—the satisfying sensation in the throat similar to smoking; (2) Flavor carrier—excellent at dissolving and delivering flavor concentrates; (3) Less vapor production—creates smaller, less visible clouds; (4) Thinner consistency—wicks faster in coils, reducing dry hits. PG allergies affect 1-2% of users, causing throat irritation or skin reactions. Vegetable Glycerin (VG) is a thick, slightly sweet liquid providing: (1) Vapor production—creates large, dense clouds; (2) Smoothness—reduces throat hit and harshness; (3) Subtle sweetness—slightly mutes flavors but adds smoothness; (4) Thicker consistency—requires devices with larger wicking channels to prevent dry hits. Common PG/VG ratios and applications: 50/50 (50% PG, 50% VG) - balanced ratio providing moderate throat hit, good flavor, and moderate vapor. Ideal for beginners, pod systems, and mouth-to-lung devices. Example: 10 mL bottle contains 5 mL PG and 5 mL VG. 60/40 (60% PG, 40% VG) - higher PG for stronger throat hit and flavor emphasis. Preferred by former smokers using standard tanks. 30/70 (30% PG, 70% VG) - high VG for cloud chasing and sub-ohm devices. Smoother draw with less throat hit. Popular for 3-6 mg/mL nicotine strengths. Example: 30 mL bottle contains 9 mL PG and 21 mL VG. 20/80 or max VG (20% PG, 80% VG) - maximum vapor production for cloud competitions. Requires powerful devices (60+ watts) and sub-ohm coils (0.15-0.5 ohm). Calculating custom blends: To create 50 mL of 40/60 ratio from pure PG and VG: PG needed = 50 × 0.40 = 20 mL PG; VG needed = 50 × 0.60 = 30 mL VG. Adjusting existing ratios: You have 30 mL of 50/50 liquid (15 mL PG, 15 mL VG) and want 70% VG. Current VG percentage: 15/30 = 50%. To achieve 70% VG, add pure VG: Let x = mL of VG to add. New ratio: (15 + x)/(30 + x) = 0.70. Solving: 15 + x = 0.70(30 + x), 15 + x = 21 + 0.7x, 0.3x = 6, x = 20 mL VG to add, creating 50 mL total at 70% VG. Practical implications: High PG ratios work best in low-power devices and replicate smoking sensation; high VG ratios require high-power devices (40+ watts) and produce dramatic vapor but may cause coil gunking from VG's thickness. Users switching from cigarettes typically start with 50/50 or 60/40, then transition to higher VG as they adapt and potentially reduce nicotine strength.

Mixing e-liquids of different nicotine concentrations requires careful calculation to achieve the desired final strength, using the weighted average formula: Final Concentration = (Volume₁ × Concentration₁ + Volume₂ × Concentration₂) ÷ Total Volume. Example 1 - Two liquids mixed: Mixing 10 mL of 18 mg/mL with 20 mL of 6 mg/mL: Total volume = 10 + 20 = 30 mL. Total nicotine = (10 × 18) + (20 × 6) = 180 + 120 = 300 mg. Final concentration = 300 ÷ 30 = 10 mg/mL. Example 2 - Diluting high strength: You have 30 mL of 24 mg/mL and want to dilute to 12 mg/mL. How much 0 mg/mL base to add? Let x = mL of 0 mg/mL base. (30 × 24 + x × 0) ÷ (30 + x) = 12. Solving: 720 = 12(30 + x), 720 = 360 + 12x, 12x = 360, x = 30 mL. Add 30 mL of 0 mg/mL base to create 60 mL at 12 mg/mL. Example 3 - Creating specific strength from nicotine base: Making 100 mL of 6 mg/mL from 100 mg/mL nicotine base: Nicotine needed = 100 mL × 6 mg/mL = 600 mg total. Volume of 100 mg/mL base = 600 ÷ 100 = 6 mL nicotine base. Remaining volume = 100 - 6 = 94 mL of PG/VG/flavor. For 70% VG blend: VG = 94 × 0.70 = 65.8 mL; PG = 94 × 0.30 = 28.2 mL (includes flavor which is PG-based). Example 4 - Three liquid mixing: Combining 15 mL of 24 mg/mL, 10 mL of 12 mg/mL, and 25 mL of 3 mg/mL: Total nicotine = (15 × 24) + (10 × 12) + (25 × 3) = 360 + 120 + 75 = 555 mg. Total volume = 50 mL. Final concentration = 555 ÷ 50 = 11.1 mg/mL. Reverse calculation - Achieving target strength: You want 40 mL of 9 mg/mL using 18 mg/mL and 3 mg/mL liquids. Let x = mL of 18 mg/mL. Then (40-x) = mL of 3 mg/mL. Equation: (x × 18) + [(40-x) × 3] = 40 × 9. Solving: 18x + 120 - 3x = 360, 15x = 240, x = 16 mL of 18 mg/mL and 24 mL of 3 mg/mL. Safety critical points: (1) Never handle nicotine base above 100 mg/mL without protective equipment—nicotine is absorbed through skin and can be fatal at high concentrations. (2) Use gloves, eye protection, and work in ventilated area when mixing. (3) Always mix in well-lit area with accurate graduated cylinders or syringes for measurement. (4) Store nicotine base in child-proof containers in locked, cool, dark location. (5) A 10 mg error in a 30 mL bottle changes concentration by 0.33 mg/mL—potentially causing nicotine overdose symptoms (nausea, dizziness, rapid heart rate) if error is upward. (6) Label all mixed bottles with nicotine strength, date mixed, and PG/VG ratio. (7) When in doubt about calculations, use online calculators or start with commercial pre-mixed liquids rather than mixing high-concentration nicotine base.

Freebase nicotine and nicotine salts are chemically distinct forms affecting vaping experience, absorption, and appropriate concentrations: Freebase nicotine is the pure, de-protonated form of nicotine with pH 9-10 (alkaline). It provides: (1) Strong throat hit at higher concentrations (12+ mg/mL), which can be harsh; (2) Slower absorption into bloodstream, taking 10-20 minutes for peak blood levels; (3) Lower concentration tolerance—most users find 24+ mg/mL uncomfortably harsh in standard devices; (4) Best for sub-ohm and high-power devices at 3-12 mg/mL concentrations. Freebase is traditional e-liquid nicotine, ideal for producing large vapor clouds with moderate nicotine satisfaction. Nicotine salts are nicotine molecules combined with organic acids (typically benzoic acid), creating a pH-neutral compound (pH 5-7) that more closely resembles nicotine in tobacco leaves. Benefits include: (1) Smoother throat hit even at high concentrations—50 mg/mL nicotine salt feels similar to 12 mg/mL freebase in harshness; (2) Faster absorption into bloodstream, reaching peak levels in 5-7 minutes, mimicking cigarette nicotine delivery kinetics; (3) Higher concentration tolerance—users comfortably vape 20-59 mg/mL in pod systems; (4) Better satisfaction for smoking cessation—rapid nicotine delivery reduces cigarette cravings more effectively; (5) Lower vapor production—used in low-power pod systems (8-15 watts), creating discreet vapor. Concentration equivalencies (approximate): 50 mg/mL nicotine salt ≈ 18-24 mg/mL freebase in terms of perceived harshness, but 50 mg/mL delivers significantly more total nicotine due to higher concentration and faster absorption. Practical dosing: Light smokers (<10 cigarettes/day): 20-25 mg/mL nicotine salt or 6-12 mg/mL freebase. Moderate smokers (10-20 cigarettes/day): 35-45 mg/mL nicotine salt or 12-18 mg/mL freebase. Heavy smokers (pack+/day): 50-59 mg/mL nicotine salt or 18-24 mg/mL freebase. Calculation adjustments: Nicotine salts follow the same mathematical mixing formulas as freebase, but device and usage pattern differ. A user vaping 2 mL daily of 50 mg/mL nicotine salt receives 100 mg nicotine daily—equivalent to vaping 16.7 mL of 6 mg/mL freebase or smoking 50-100 cigarettes in terms of nicotine dose (though cigarettes contain additional harmful constituents). Safety considerations: High nicotine salt concentrations (50+ mg/mL) should ONLY be used in low-power pod systems (under 20 watts). Using 50 mg/mL in sub-ohm devices producing large vapor clouds can cause severe nicotine poisoning—symptoms include nausea, vomiting, dizziness, increased heart rate, sweating, confusion, and in severe cases, seizures. The LD50 (lethal dose for 50% of population) of nicotine is approximately 0.5-1 mg/kg, so a 70 kg adult's lethal dose is 35-70 mg ingested or absorbed—easily achievable by swallowing concentrated nicotine liquid or over-vaping high concentrations. Switching between types: Transitioning from 50 mg/mL nicotine salt in a pod system to freebase in a sub-ohm device requires dropping to 3-6 mg/mL freebase because sub-ohm devices vaporize 5-10× more liquid per puff, delivering similar total nicotine despite lower concentration. Always start with lower concentrations when changing device types and adjust based on satisfaction and absence of nicotine overdose symptoms.

E-liquid flavor concentrates are highly concentrated essences mixed at 5-20% of total e-liquid volume, varying by flavor type and manufacturer. Flavor percentage guidelines: Single fruit flavors: 8-15% (e.g., strawberry 10%, watermelon 12%). Bakery flavors: 12-20% (e.g., vanilla custard 15%, cinnamon roll 18%). Tobacco flavors: 5-10% (e.g., RY4 tobacco 8%). Menthol/mint: 3-8% (e.g., menthol 5%—very potent). Complex blends: 15-25% total when combining multiple flavors. Calculating flavor amounts: To make 30 mL e-liquid with 12% strawberry flavor: Flavor volume = 30 × 0.12 = 3.6 mL strawberry concentrate. Remaining 26.4 mL consists of nicotine base, PG, and VG. Example recipe - 100 mL of 6 mg/mL, 70% VG, with 15% total flavoring (10% vanilla custard + 5% caramel): Step 1: Nicotine - using 100 mg/mL nicotine base in PG: (100 × 6) ÷ 100 = 6 mL nicotine base. Step 2: Flavoring - 100 × 0.15 = 15 mL total flavor (10 mL vanilla custard + 5 mL caramel). Most flavor concentrates are PG-based. Step 3: PG total - Target 30% PG = 30 mL. Already have 6 mL (nicotine) + 15 mL (flavor) = 21 mL PG. Need 30 - 21 = 9 mL additional PG. Step 4: VG - Target 70% = 70 mL, so 70 mL VG. Total: 6 + 15 + 9 + 70 = 100 mL. Steep time requirements: After mixing, e-liquids require steeping (aging) for optimal flavor: Fruit flavors: 3-7 days (shake daily). Creamy/custard flavors: 2-4 weeks (complex molecules need time to meld). Tobacco flavors: 1-3 weeks. Speed steeping methods: Warm water bath (30-40°C for 1-2 hours), ultrasonic cleaner (15-30 minutes), or breathing (removing cap for 6-12 hours to allow volatile compounds to dissipate). Safety and quality practices: (1) Food-grade ingredients only—never use fragrance oils or essential oils containing carrier oils which cause lipoid pneumonia when inhaled. (2) Diacetyl-free flavors—diacetyl (butter flavoring) is linked to bronchiolitis obliterans ("popcorn lung") from occupational exposure; though risk from vaping is debated, many vendors offer diacetyl-free alternatives. (3) Clean mixing environment—sanitize bottles, syringes, and work surface; wash hands thoroughly. (4) Accurate measurements—use graduated cylinders or syringes marked in 0.1-0.5 mL increments for precision. A 1 mL error in 30 mL batch = 3.3% concentration change. (5) Proper storage—store mixed e-liquid in dark glass or LDPE plastic bottles in cool (<20°C), dark location. Nicotine oxidizes when exposed to light/heat, turning liquid pink or brown and creating harsh, peppery taste. Refrigeration extends shelf life to 1-2 years versus 6-12 months at room temperature. (6) Batch testing—mix small 10 mL test batches before scaling to larger volumes, adjusting flavor percentages based on personal preference. (7) Documentation—record recipes with exact measurements, steep times, and device used for repeatable results. (8) Childproofing—all e-liquids must be stored in child-resistant containers away from children and pets; nicotine ingestion is potentially fatal, especially concentrated solutions.

Nicotine overdose (also called nicotine poisoning or "nic sick") occurs when excessive nicotine is absorbed, causing toxic symptoms. Understanding your nicotine intake through proper calculations prevents this serious condition. Nicotine overdose symptoms (severity increases with dose): Mild symptoms (20-50 mg absorbed in non-tolerant adult): Nausea, dizziness, headache, increased salivation, abdominal discomfort, mild anxiety. These may occur when new vapers use too high nicotine concentration or take too many puffs too quickly. Moderate symptoms (50-100 mg absorbed): Vomiting, profuse sweating, increased heart rate (tachycardia 100-120 bpm), elevated blood pressure, tremors, confusion, pale skin. Medical attention advisable. Severe symptoms (>150 mg absorbed): Severe vomiting, respiratory depression, dangerous heart arrhythmias, seizures, loss of consciousness, respiratory arrest. This is a medical emergency requiring immediate emergency care. Lethal dose: Estimated at 0.5-1 mg/kg body weight (30-70 mg for average adult) when ingested, though vaping rarely delivers this level due to slower absorption and self-limiting nausea. However, accidental ingestion of high-concentration liquid or extended heavy vaping of 50+ mg/mL can approach dangerous levels. Calculating safe daily limits: Tolerant daily smoker: Can handle 40-60 mg nicotine daily via vaping without overdose symptoms (equivalent to 1-1.5 packs cigarettes). Example safe usage: 4 mL of 12 mg/mL = 48 mg daily, or 2 mL of 25 mg/mL = 50 mg daily. New vaper/non-smoker: Should limit to 10-20 mg daily maximum to avoid symptoms. Example: 3 mL of 3 mg/mL = 9 mg daily, or 1 mL of 12 mg/mL = 12 mg daily. Heavy vaper concern: Using 50 mg/mL nicotine salt at 3 mL daily = 150 mg nicotine—approaching toxic levels even in tolerant individuals. Symptoms of excessive intake may develop, requiring reduction to 35 mg/mL or 2 mL daily. Prevention strategies using calculations: (1) Track daily consumption—measure remaining liquid in tank/pod at day's end. If using 6+ mL daily at 12+ mg/mL (72+ mg nicotine), consider reducing concentration. (2) Match device to concentration—sub-ohm devices should use ≤6 mg/mL; pod systems can use up to 50 mg/mL. (3) Taper gradually—reduce concentration by 3-6 mg/mL every 2-4 weeks to minimize withdrawal while preventing overdose. (4) Recognize chain-vaping triggers—stress, boredom, or social situations may lead to excessive puffing. If experiencing mild symptoms (nausea, headache), stop vaping for 1-2 hours. (5) Proper mixing prevents concentrated hotspots—shake e-liquid thoroughly before use; poorly mixed liquids may have concentrated nicotine zones delivering unexpected doses. Treatment for overdose: Mild symptoms: Stop vaping immediately, drink water, rest in fresh air, symptoms resolve in 1-2 hours. Moderate symptoms: Seek medical evaluation, may require IV fluids and monitoring. Severe symptoms or ingestion: Call emergency services (911) immediately. Do not induce vomiting if nicotine liquid was swallowed; bring bottle for identification. Activated charcoal may be administered within 1 hour of ingestion. Special risk populations: Children, pregnant women, and individuals with cardiovascular disease are at higher risk. A toddler ingesting 1 mL of 50 mg/mL liquid (50 mg dose) could experience severe toxicity—child-resistant caps are mandatory but not foolproof; store all e-liquids locked and out of reach.