How to Use This Calculator
Add each supplement with a name, dose per serving, servings per day, container size and container price. Use the same unit for the dose and the container size, for example grams for both. Click Calculate stack cost to see how long each container lasts, the cost per day and per month for each item, the total for the whole stack and the date you will need to reorder first.
Why Stacks Are Easy to Plan Poorly One Item at a Time
A stack built up one product at a time rarely gets looked at as a whole. The total monthly cost creeps up, and containers run out on different days, so you end up placing small orders every week. Seeing every item together shows the real monthly spend and the first reorder date, so you can buy in one go.
Budgeting and Scheduling the Full Stack
For the cost side specifically, the Peptide Cycle Cost Estimator breaks down compound costs in more depth for a research cycle running alongside the stack. For timing across compounds specifically, the Multi-Peptide Weekly Schedule Builder lays out injection timing on its own colour-coded weekly calendar.
What a Two-Item Supplement Stack Costs Over Time
A supplement stack is simply the set of products you use together, so its cost is the sum of each product’s cost per day. The table uses the two-item example on this page: creatine at $0.25 per day and whey protein at $0.83 per day, which together come to $1.08 a day.
| Period | Creatine | Whey protein | Whole stack |
|---|---|---|---|
| 30 days | $7.50 | $24.75 | $32.25 |
| 90 days | $22.50 | $74.25 | $96.75 |
| 180 days | $45.00 | $148.50 | $193.50 |
The figures are cost per day multiplied by the number of days, so they show running cost, not when you pay. In the example the whey bag lasts 66.7 days and the creatine tub 100 days, so the whey is the first to reorder. Change the doses, sizes and prices in the planner above to see your own stack.
Who Should Use This
Anyone running several supplements who wants a monthly budget and a reorder date; researchers tracking consumable costs alongside a peptide cycle.
What This Calculator Does
The Supplement Stack Planner adds up the running cost of up to six supplements. For each one it works out how many days a container lasts and the cost per day and per month, then shows the stack's daily and monthly totals and the date the first container runs out.
Formula Used
Days per container = Container size ÷ (Dose per serving × Servings per day)Cost per day = (Container price ÷ Container size) × Dose per serving × Servings per dayCost per month = Cost per day × 30Example Calculation
Limitations
Dose and container size must use the same unit (both grams, or both capsules). Uses a 30-day month and assumes every serving is taken every day. It does not check for interactions between supplements.
Frequently Asked Questions
What is a supplement stack and how do I build an effective one?
A supplement stack combines multiple supplements taken together to achieve a specific performance, recovery, or health goal. Build one by first identifying your primary objective, then selecting evidence-based compounds that address it, checking for ingredient overlap, and calculating total daily intake and cost.
How do I avoid accidentally double-dosing ingredients across multiple supplements?
Read the full ingredient panel of every product in your stack and list the active compounds. Many pre-workouts, protein powders, and recovery products share ingredients like caffeine, creatine, and B vitamins. The Stack Planner helps you identify overlaps so you can consolidate or adjust.
Which supplements have the strongest scientific evidence for performance?
The most evidence-backed supplements for physical performance are: creatine monohydrate (strength and power output), caffeine (endurance, focus, and strength), beta-alanine (buffering lactic acid in high-intensity exercise), and whey protein (muscle protein synthesis). These form the core of most effective stacks.
Should I cycle off supplements periodically?
Most supplements do not require cycling. Exceptions include stimulants. Tolerance to caffeine develops after continuous use, and periodic breaks (1-2 weeks) restore sensitivity. Creatine, protein, vitamins, and minerals are safe and effective taken continuously without needing breaks.
How do I calculate the cost of a supplement stack?
Work out each supplement on its own: cost per day is the container price divided by the container size, multiplied by the dose and the servings per day. Multiply by 30 for a month, then add the items together. For example, a $25, 500 g creatine tub at 5 g a day is $0.25 per day, and a $55, 2,000 g whey bag at 30 g a day is $0.83 per day, so the two together cost $1.08 per day. The planner does this for up to six items.
How do I work out how many days a supplement container lasts?
Divide the container size by the amount you use per day, which is the dose per serving multiplied by the servings per day. A 500 g tub used at 5 g once a day lasts 500 / 5 = 100 days, and a 2,000 g bag used at 30 g a day lasts about 66.7 days. Use the same unit for the dose and the container size, for example grams for both.