Cost of goods (COGS)
Every per-box variable cost
Fitness Box Calculator
Fitness and Supplement Subscription Box Calculator
Pre-filled with fitness and supplement box economics: $30-$50 price points, 6-8% monthly churn, and heavy product costs. Tune the inputs to model profit, pricing, LTV, and break-even before you start a fitness subscription box business.
- $30-$50Typical monthly priceMainstream fitness box range
- 18.0%Gross margin at $44.99About $53 reaches 30% in 2026
- 6-8%Monthly churnSubscribers reorder favorites direct
- 4-8Items per boxSupplements, gear, accessories
Compare with other categories
Three other box types worth modeling
Each linked calculator uses the same logic with category-specific defaults. Open one if your idea overlaps with these economics.
FAQ
Fitness Box questions answered
Common questions founders ask when modeling this category.
Q01How much does a fitness subscription box cost?
Most fitness and supplement subscription boxes charge $30 to $50 a month. Supplement boxes with full-size products sit at the top of that range, while boxes built around small accessories or samples sit at the bottom. The calculator above starts at $44.99, which is typical for a box with several full-size supplements.
Q02Are supplement subscription boxes profitable?
They can be, but product cost and weight are the traps. At the default inputs above ($18 in product, $11.57 to ship a 3 lb box with USPS Ground Advantage, and $3 packaging on a $44.99 box), gross profit is about $8.11 per box, an 18.0% margin. That is well under the 30% target. Cutting product cost to $12 through private-label or brand-sponsored products lifts the margin to about 31.6% at the same price.
Q03Why do fitness boxes lose subscribers to the brands they feature?
Subscribers try a protein powder or pre-workout in the box, like it, and then buy the full tub straight from the brand for less. Each successful discovery can end the subscription. The fixes are exclusive flavors or sizes, private-label products, and member pricing that makes reordering through your box the cheapest option.
Q04Should I start a supplement box or a gear box?
Supplement boxes usually retain better because subscribers run out and need more each month. Gear boxes feel exciting at first, but subscribers quickly own enough resistance bands and shaker bottles, so churn rises after a few months. Many successful fitness boxes combine one gear or accessory item with consumable supplements.
Q05What is a sustainable CAC for a fitness subscription box?
At the default inputs, gross profit is $8.11 per box and monthly churn is 7%, so an average subscriber stays about 14 months and is worth roughly $116 in gross profit. A $32 CAC gives an LTV:CAC ratio of about 3.6:1, just above the 3:1 line. If your margin is lower or churn is higher, keep CAC under a third of LTV.
Q06Do supplement boxes need special shipping or labeling?
Supplements are dense and heavy, so for most supplement boxes the actual weight, not the dimensional weight, sets the shipping price. Check expiry dates on every batch and add a spoilage buffer of 2-3% in the calculator. Only ship supplements from brands that follow FDA labeling rules, and never make health claims about the products yourself.
Keep going
Related calculators & tools
Build on the numbers above with these focused calculators.
Plan the launch
Ready to take your fitness box from numbers to launch?
Use the Launch Readiness Calculator to check operational and financial readiness, or the Niche Viability Scorer to test your supplement or gear niche before committing to inventory.