This guide concerns practical decisions about supplement use. It does not establish that a fat burner treats a medical condition or produces weight loss.
The sticker price is a weak comparison
A bottle with 90 capsules looks larger than one with 60, but the first may require three capsules daily while the second uses one. One lasts 30 days, the other 60. A “save 30%” subscription can also have a higher later price and shipping fee. Comparing the front labels alone tells you little about the cash needed to follow each product's directions.
The cheap versus premium guide addresses value broadly. This page gives an arithmetic method that keeps sellers' different package sizes on the same footing.
First calculate usable days
Find the number of capsules, scoops or measured servings in the container and the recommended daily amount on the current label. Divide total quantity by daily use. If a bottle has 90 capsules and the label says three per day, it provides 30 days; if directions change with activity days, work from the actual planned schedule and show your assumption.
Do not count an impossible fraction of a day as a full day. If a proprietary blend hides ingredient doses, the cost calculation can still be done, but the product's evidence and safety remain uncertain. The label guide helps locate serving size.
Build the landed cost
Add product price, delivery charge, estimated taxes shown at checkout and any required fees. For a recurring plan, distinguish introductory from later shipments and compare a fixed period such as 90 days. Include only confirmed charges; if tax depends on your location, use the final checkout amount instead of inventing it. A coupon can reduce one order but not necessarily later ones.
Formula: total paid for the period divided by usable days equals cost per day. Multiply by 30 for an approximate 30-day cost. Always label the period so a one-time purchase is not silently compared with a discounted first subscription month. FTC advises checking renewal terms before signing up.
A simple worked comparison
Suppose Product A costs $42 for 60 capsules, with two taken daily and $6 delivery. Its 30 usable days cost $48 before any taxes, or $1.60 per day. Product B costs $54 for 90 capsules with three daily and free delivery. It also lasts 30 days, at $1.80 per day. The larger bottle is more expensive per usable day in this example. These are illustrative numbers, not current prices.
Now suppose A's second shipment rises to $49 with delivery. The introductory $1.60 figure no longer describes the ongoing plan. Make another row for the renewal and an average over the intended period. The subscription guide covers terms beyond arithmetic.
Bundles and unused bottles change the value
A bundle discount can lower cost per capsule while increasing the amount you pay today and the number of unused bottles if the product is not a fit. Compare a one-bottle trial and a bundle over the same planned use, including shipping and return terms. Do not assume an unopened bottle can be returned; check the actual seller policy. A warehouse-size package is not a saving if you stop after one week.
The single bottle versus bundle page explores that tradeoff. Price per usable day is most helpful after you have a realistic reason to expect you will use the product.
Cost per day is not benefit per day
A capsule can be inexpensive yet have no credible evidence of meaningful weight-loss benefit. Another can be costly without better proof. Calculate price and evaluate evidence separately. NIH ODS notes limited or mixed evidence for many weight-loss ingredients; a list of fashionable botanicals is not a trial of the finished formula. If the label obscures active amounts, you cannot compensate for that uncertainty with a low price.
The evidence checklist helps decide whether the outcome you want has actually been studied. A meaningful comparison asks both what you pay and what is known about results and harms.
Where Fat Burn Active fits
Our affiliate relationship should not turn a low introductory price into a reason to buy. If the benefit is uncertain for your needs, a cheaper daily cost may still be a poor use of money. Compare the complete decision, not one banner.
A reusable three-row worksheet
For each option, record the container quantity, units per day, usable days, initial landed price and ongoing landed price. Then calculate cost per day for the first order and over a shared 90-day period. Add a final row for return eligibility and the worst-case cost if you stop early. This simple worksheet can be kept in notes on your phone.
If a label changes, recalculate. An extra capsule in the daily directions can cut usable days substantially. A transparent comparison is valuable even when the final decision is to buy nothing and focus on ordinary food and activity habits.
Build a 90-day example with renewals
Suppose a seller advertises a first bottle for $30, then two monthly renewals at $45, plus $5 shipping each time. For a three-month window, the subtotal is $30 + $45 + $45 + $15 shipping = $135 before taxes. That is $45 per 30-day month if each bottle actually lasts 30 days. The first bottle's $30 headline would understate the average paid over the period. If each bottle lasts only 20 days at the recommended serving, three bottles cover 60 days, not 90, and another purchase is needed.
The point is to align units: same duration, same number of usable days and the real checkout charges. Taxes vary by location, so add the amount shown on your order rather than using a guessed rate. If a bundle has a free bottle, count it only if its shelf life and your likely use make it usable. A comparison that ignores unused inventory can make a bulk deal look better than it is.
If you stop early due to side effects or weak benefit, compute the amount actually spent and check the return policy. An inexpensive daily cost on paper is not what you paid if most capsules remain unopened and nonreturnable. This is why evidence and safety are part of the value calculation, even though they do not appear in the arithmetic formula.
Compare the whole formula before deciding
Check the current package, ingredients, serving directions, your other caffeine sources, and relevant health conditions. For an evidence-based starting point, read the full Fat Burn Active review. If this product still fits your circumstances, you can inspect its current offer. We may earn a commission if you buy through that link. Choosing no supplement is equally reasonable when the evidence or safety questions do not support a purchase.
Frequently asked questions
Is price per bottle enough?
No. First calculate usable days at the actual daily serving.
How do I compare a subscription?
Include later charges and use the same period for both options.
Should I include shipping and taxes?
Yes, use the amounts shown for your order.
Sources
- FTC: Trials and Auto-Renewals
- FTC: Online Shopping
- NIH ODS: Weight-Loss Supplements
- FDA: Dietary Supplement Labels
- NIDDK: Weight Management
Reviewed against the sources listed above. Educational information only; not medical advice.